IGNIETFERRO-1816 Update Python 3 from 3.9.12 to 3.10.4

ref:9f96be6d02ee8044fdd6f124b799b270c20ce641

1 files changed, 361 insertions, 136 deletions

diff --git a/contrib/tools/python3/src/Python/symtable.c b/contrib/tools/python3/src/Python/symtable.c
index d192f31dee..07f9d1132c 100644
--- a/contrib/tools/python3/src/Python/symtable.c
+++ b/contrib/tools/python3/src/Python/symtable.c
@@ -1,7 +1,9 @@
 #include "Python.h"
-#include "pycore_pystate.h"   // _PyThreadState_GET()
-#include "symtable.h"
-#undef Yield   /* undefine macro conflicting with <winbase.h> */
+#include "pycore_ast.h"           // identifier, stmt_ty
+#include "pycore_compile.h"       // _Py_Mangle(), _PyFuture_FromAST()
+#include "pycore_parser.h"        // _PyParser_ASTFromString()
+#include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_symtable.h"      // PySTEntryObject
 #include "structmember.h"         // PyMemberDef
 
 /* error strings used for warnings */
@@ -43,9 +45,20 @@
 #define NAMED_EXPR_COMP_ITER_EXPR \
 "assignment expression cannot be used in a comprehension iterable expression"
 
+#define ANNOTATION_NOT_ALLOWED \
+"'%s' can not be used within an annotation"
+
+
+#define LOCATION(x) \
+ (x)->lineno, (x)->col_offset, (x)->end_lineno, (x)->end_col_offset
+
+#define ST_LOCATION(x) \
+ (x)->ste_lineno, (x)->ste_col_offset, (x)->ste_end_lineno, (x)->ste_end_col_offset
+
 static PySTEntryObject *
 ste_new(struct symtable *st, identifier name, _Py_block_ty block,
-        void *key, int lineno, int col_offset)
+        void *key, int lineno, int col_offset,
+        int end_lineno, int end_col_offset)
 {
     PySTEntryObject *ste = NULL;
     PyObject *k = NULL;
@@ -79,6 +92,8 @@ ste_new(struct symtable *st, identifier name, _Py_block_ty block,
     ste->ste_opt_col_offset = 0;
     ste->ste_lineno = lineno;
     ste->ste_col_offset = col_offset;
+    ste->ste_end_lineno = end_lineno;
+    ste->ste_end_col_offset = end_col_offset;
 
     if (st->st_cur != NULL &&
         (st->st_cur->ste_nested ||
@@ -87,7 +102,7 @@ ste_new(struct symtable *st, identifier name, _Py_block_ty block,
     ste->ste_child_free = 0;
     ste->ste_generator = 0;
     ste->ste_coroutine = 0;
-    ste->ste_comprehension = 0;
+    ste->ste_comprehension = NoComprehension;
     ste->ste_returns_value = 0;
     ste->ste_needs_class_closure = 0;
     ste->ste_comp_iter_target = 0;
@@ -128,7 +143,7 @@ ste_dealloc(PySTEntryObject *ste)
     Py_XDECREF(ste->ste_varnames);
     Py_XDECREF(ste->ste_children);
     Py_XDECREF(ste->ste_directives);
-    PyObject_Del(ste);
+    PyObject_Free(ste);
 }
 
 #define OFF(x) offsetof(PySTEntryObject, x)
@@ -188,8 +203,9 @@ PyTypeObject PySTEntry_Type = {
 
 static int symtable_analyze(struct symtable *st);
 static int symtable_enter_block(struct symtable *st, identifier name,
-                                _Py_block_ty block, void *ast, int lineno,
-                                int col_offset);
+                                _Py_block_ty block, void *ast,
+                                int lineno, int col_offset,
+                                int end_lineno, int end_col_offset);
 static int symtable_exit_block(struct symtable *st);
 static int symtable_visit_stmt(struct symtable *st, stmt_ty s);
 static int symtable_visit_expr(struct symtable *st, expr_ty s);
@@ -202,16 +218,21 @@ static int symtable_visit_excepthandler(struct symtable *st, excepthandler_ty);
 static int symtable_visit_alias(struct symtable *st, alias_ty);
 static int symtable_visit_comprehension(struct symtable *st, comprehension_ty);
 static int symtable_visit_keyword(struct symtable *st, keyword_ty);
-static int symtable_visit_params(struct symtable *st, asdl_seq *args);
-static int symtable_visit_argannotations(struct symtable *st, asdl_seq *args);
+static int symtable_visit_params(struct symtable *st, asdl_arg_seq *args);
+static int symtable_visit_annotation(struct symtable *st, expr_ty annotation);
+static int symtable_visit_argannotations(struct symtable *st, asdl_arg_seq *args);
 static int symtable_implicit_arg(struct symtable *st, int pos);
-static int symtable_visit_annotations(struct symtable *st, arguments_ty, expr_ty);
+static int symtable_visit_annotations(struct symtable *st, stmt_ty, arguments_ty, expr_ty);
 static int symtable_visit_withitem(struct symtable *st, withitem_ty item);
+static int symtable_visit_match_case(struct symtable *st, match_case_ty m);
+static int symtable_visit_pattern(struct symtable *st, pattern_ty s);
+static int symtable_raise_if_annotation_block(struct symtable *st, const char *, expr_ty);
+static int symtable_raise_if_comprehension_block(struct symtable *st, expr_ty);
 
 
 static identifier top = NULL, lambda = NULL, genexpr = NULL,
     listcomp = NULL, setcomp = NULL, dictcomp = NULL,
-    __class__ = NULL;
+    __class__ = NULL, _annotation = NULL;
 
 #define GET_IDENTIFIER(VAR) \
     ((VAR) ? (VAR) : ((VAR) = PyUnicode_InternFromString(# VAR)))
@@ -241,7 +262,7 @@ symtable_new(void)
     st->st_private = NULL;
     return st;
  fail:
-    PySymtable_Free(st);
+    _PySymtable_Free(st);
     return NULL;
 }
 
@@ -258,10 +279,10 @@ symtable_new(void)
 #define COMPILER_STACK_FRAME_SCALE 3
 
 struct symtable *
-PySymtable_BuildObject(mod_ty mod, PyObject *filename, PyFutureFeatures *future)
+_PySymtable_Build(mod_ty mod, PyObject *filename, PyFutureFeatures *future)
 {
     struct symtable *st = symtable_new();
-    asdl_seq *seq;
+    asdl_stmt_seq *seq;
     int i;
     PyThreadState *tstate;
     int recursion_limit = Py_GetRecursionLimit();
@@ -270,7 +291,7 @@ PySymtable_BuildObject(mod_ty mod, PyObject *filename, PyFutureFeatures *future)
     if (st == NULL)
         return NULL;
     if (filename == NULL) {
-        PySymtable_Free(st);
+        _PySymtable_Free(st);
         return NULL;
     }
     Py_INCREF(filename);
@@ -280,7 +301,7 @@ PySymtable_BuildObject(mod_ty mod, PyObject *filename, PyFutureFeatures *future)
     /* Setup recursion depth check counters */
     tstate = _PyThreadState_GET();
     if (!tstate) {
-        PySymtable_Free(st);
+        _PySymtable_Free(st);
         return NULL;
     }
     /* Be careful here to prevent overflow. */
@@ -292,8 +313,8 @@ PySymtable_BuildObject(mod_ty mod, PyObject *filename, PyFutureFeatures *future)
 
     /* Make the initial symbol information gathering pass */
     if (!GET_IDENTIFIER(top) ||
-        !symtable_enter_block(st, top, ModuleBlock, (void *)mod, 0, 0)) {
-        PySymtable_Free(st);
+        !symtable_enter_block(st, top, ModuleBlock, (void *)mod, 0, 0, 0, 0)) {
+        _PySymtable_Free(st);
         return NULL;
     }
 
@@ -323,7 +344,7 @@ PySymtable_BuildObject(mod_ty mod, PyObject *filename, PyFutureFeatures *future)
         goto error;
     }
     if (!symtable_exit_block(st)) {
-        PySymtable_Free(st);
+        _PySymtable_Free(st);
         return NULL;
     }
     /* Check that the recursion depth counting balanced correctly */
@@ -331,35 +352,23 @@ PySymtable_BuildObject(mod_ty mod, PyObject *filename, PyFutureFeatures *future)
         PyErr_Format(PyExc_SystemError,
             "symtable analysis recursion depth mismatch (before=%d, after=%d)",
             starting_recursion_depth, st->recursion_depth);
-        PySymtable_Free(st);
+        _PySymtable_Free(st);
         return NULL;
     }
     /* Make the second symbol analysis pass */
     if (symtable_analyze(st))
         return st;
-    PySymtable_Free(st);
+    _PySymtable_Free(st);
     return NULL;
  error:
     (void) symtable_exit_block(st);
-    PySymtable_Free(st);
+    _PySymtable_Free(st);
     return NULL;
 }
 
-struct symtable *
-PySymtable_Build(mod_ty mod, const char *filename_str, PyFutureFeatures *future)
-{
-    PyObject *filename;
-    struct symtable *st;
-    filename = PyUnicode_DecodeFSDefault(filename_str);
-    if (filename == NULL)
-        return NULL;
-    st = PySymtable_BuildObject(mod, filename, future);
-    Py_DECREF(filename);
-    return st;
-}
 
 void
-PySymtable_Free(struct symtable *st)
+_PySymtable_Free(struct symtable *st)
 {
     Py_XDECREF(st->st_filename);
     Py_XDECREF(st->st_blocks);
@@ -392,7 +401,7 @@ PySymtable_Lookup(struct symtable *st, void *key)
 static long
 _PyST_GetSymbol(PySTEntryObject *ste, PyObject *name)
 {
-    PyObject *v = PyDict_GetItem(ste->ste_symbols, name);
+    PyObject *v = PyDict_GetItemWithError(ste->ste_symbols, name);
     if (!v)
         return 0;
     assert(PyLong_Check(v));
@@ -400,7 +409,7 @@ _PyST_GetSymbol(PySTEntryObject *ste, PyObject *name)
 }
 
 int
-PyST_GetScope(PySTEntryObject *ste, PyObject *name)
+_PyST_GetScope(PySTEntryObject *ste, PyObject *name)
 {
     long symbol = _PyST_GetSymbol(ste, name);
     return (symbol >> SCOPE_OFFSET) & SCOPE_MASK;
@@ -417,9 +426,11 @@ error_at_directive(PySTEntryObject *ste, PyObject *name)
         assert(PyTuple_CheckExact(data));
         assert(PyUnicode_CheckExact(PyTuple_GET_ITEM(data, 0)));
         if (PyUnicode_Compare(PyTuple_GET_ITEM(data, 0), name) == 0) {
-            PyErr_SyntaxLocationObject(ste->ste_table->st_filename,
-                                       PyLong_AsLong(PyTuple_GET_ITEM(data, 1)),
-                                       PyLong_AsLong(PyTuple_GET_ITEM(data, 2)) + 1);
+            PyErr_RangedSyntaxLocationObject(ste->ste_table->st_filename,
+                                             PyLong_AsLong(PyTuple_GET_ITEM(data, 1)),
+                                             PyLong_AsLong(PyTuple_GET_ITEM(data, 2)) + 1,
+                                             PyLong_AsLong(PyTuple_GET_ITEM(data, 3)),
+                                             PyLong_AsLong(PyTuple_GET_ITEM(data, 4)) + 1);
 
             return 0;
         }
@@ -634,7 +645,7 @@ update_symbols(PyObject *symbols, PyObject *scopes,
         long scope, flags;
         assert(PyLong_Check(v));
         flags = PyLong_AS_LONG(v);
-        v_scope = PyDict_GetItem(scopes, name);
+        v_scope = PyDict_GetItemWithError(scopes, name);
         assert(v_scope && PyLong_Check(v_scope));
         scope = PyLong_AS_LONG(v_scope);
         flags |= (scope << SCOPE_OFFSET);
@@ -966,11 +977,12 @@ symtable_exit_block(struct symtable *st)
 
 static int
 symtable_enter_block(struct symtable *st, identifier name, _Py_block_ty block,
-                     void *ast, int lineno, int col_offset)
+                     void *ast, int lineno, int col_offset,
+                     int end_lineno, int end_col_offset)
 {
     PySTEntryObject *prev = NULL, *ste;
 
-    ste = ste_new(st, name, block, ast, lineno, col_offset);
+    ste = ste_new(st, name, block, ast, lineno, col_offset, end_lineno, end_col_offset);
     if (ste == NULL)
         return 0;
     if (PyList_Append(st->st_stack, (PyObject *)ste) < 0) {
@@ -988,8 +1000,17 @@ symtable_enter_block(struct symtable *st, identifier name, _Py_block_ty block,
     /* The entry is owned by the stack. Borrow it for st_cur. */
     Py_DECREF(ste);
     st->st_cur = ste;
+
+    /* Annotation blocks shouldn't have any affect on the symbol table since in
+     * the compilation stage, they will all be transformed to strings. They are
+     * only created if future 'annotations' feature is activated. */
+    if (block == AnnotationBlock) {
+        return 1;
+    }
+
     if (block == ModuleBlock)
         st->st_global = st->st_cur->ste_symbols;
+
     if (prev) {
         if (PyList_Append(prev->ste_children, (PyObject *)ste) < 0) {
             return 0;
@@ -1010,7 +1031,8 @@ symtable_lookup(struct symtable *st, PyObject *name)
 }
 
 static int
-symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _symtable_entry *ste)
+symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _symtable_entry *ste,
+                        int lineno, int col_offset, int end_lineno, int end_col_offset)
 {
     PyObject *o;
     PyObject *dict;
@@ -1026,9 +1048,9 @@ symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _s
         if ((flag & DEF_PARAM) && (val & DEF_PARAM)) {
             /* Is it better to use 'mangled' or 'name' here? */
             PyErr_Format(PyExc_SyntaxError, DUPLICATE_ARGUMENT, name);
-            PyErr_SyntaxLocationObject(st->st_filename,
-                                       ste->ste_lineno,
-                                       ste->ste_col_offset + 1);
+            PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                             lineno, col_offset + 1,
+                                             end_lineno, end_col_offset + 1);
             goto error;
         }
         val |= flag;
@@ -1048,9 +1070,9 @@ symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _s
         if (val & (DEF_GLOBAL | DEF_NONLOCAL)) {
             PyErr_Format(PyExc_SyntaxError,
                 NAMED_EXPR_COMP_INNER_LOOP_CONFLICT, name);
-            PyErr_SyntaxLocationObject(st->st_filename,
-                                       ste->ste_lineno,
-                                       ste->ste_col_offset + 1);
+            PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                             lineno, col_offset + 1,
+                                             end_lineno, end_col_offset + 1);
             goto error;
         }
         val |= DEF_COMP_ITER;
@@ -1071,9 +1093,12 @@ symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _s
         /* XXX need to update DEF_GLOBAL for other flags too;
            perhaps only DEF_FREE_GLOBAL */
         val = flag;
-        if ((o = PyDict_GetItem(st->st_global, mangled))) {
+        if ((o = PyDict_GetItemWithError(st->st_global, mangled))) {
             val |= PyLong_AS_LONG(o);
         }
+        else if (PyErr_Occurred()) {
+            goto error;
+        }
         o = PyLong_FromLong(val);
         if (o == NULL)
             goto error;
@@ -1092,8 +1117,11 @@ error:
 }
 
 static int
-symtable_add_def(struct symtable *st, PyObject *name, int flag) {
-    return symtable_add_def_helper(st, name, flag, st->st_cur);
+symtable_add_def(struct symtable *st, PyObject *name, int flag,
+                 int lineno, int col_offset, int end_lineno, int end_col_offset)
+{
+    return symtable_add_def_helper(st, name, flag, st->st_cur, 
+                        lineno, col_offset, end_lineno, end_col_offset);
 }
 
 /* VISIT, VISIT_SEQ and VIST_SEQ_TAIL take an ASDL type as their second argument.
@@ -1116,7 +1144,7 @@ symtable_add_def(struct symtable *st, PyObject *name, int flag) {
 
 #define VISIT_SEQ(ST, TYPE, SEQ) { \
     int i; \
-    asdl_seq *seq = (SEQ); /* avoid variable capture */ \
+    asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
     for (i = 0; i < asdl_seq_LEN(seq); i++) { \
         TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
         if (!symtable_visit_ ## TYPE((ST), elt)) \
@@ -1126,7 +1154,7 @@ symtable_add_def(struct symtable *st, PyObject *name, int flag) {
 
 #define VISIT_SEQ_TAIL(ST, TYPE, SEQ, START) { \
     int i; \
-    asdl_seq *seq = (SEQ); /* avoid variable capture */ \
+    asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
     for (i = (START); i < asdl_seq_LEN(seq); i++) { \
         TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
         if (!symtable_visit_ ## TYPE((ST), elt)) \
@@ -1136,7 +1164,7 @@ symtable_add_def(struct symtable *st, PyObject *name, int flag) {
 
 #define VISIT_SEQ_WITH_NULL(ST, TYPE, SEQ) {     \
     int i = 0; \
-    asdl_seq *seq = (SEQ); /* avoid variable capture */ \
+    asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
     for (i = 0; i < asdl_seq_LEN(seq); i++) { \
         TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
         if (!elt) continue; /* can be NULL */ \
@@ -1146,7 +1174,8 @@ symtable_add_def(struct symtable *st, PyObject *name, int flag) {
 }
 
 static int
-symtable_record_directive(struct symtable *st, identifier name, int lineno, int col_offset)
+symtable_record_directive(struct symtable *st, identifier name, int lineno,
+                          int col_offset, int end_lineno, int end_col_offset)
 {
     PyObject *data, *mangled;
     int res;
@@ -1158,7 +1187,7 @@ symtable_record_directive(struct symtable *st, identifier name, int lineno, int
     mangled = _Py_Mangle(st->st_private, name);
     if (!mangled)
         return 0;
-    data = Py_BuildValue("(Nii)", mangled, lineno, col_offset);
+    data = Py_BuildValue("(Niiii)", mangled, lineno, col_offset, end_lineno, end_col_offset);
     if (!data)
         return 0;
     res = PyList_Append(st->st_cur->ste_directives, data);
@@ -1177,20 +1206,20 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
     }
     switch (s->kind) {
     case FunctionDef_kind:
-        if (!symtable_add_def(st, s->v.FunctionDef.name, DEF_LOCAL))
+        if (!symtable_add_def(st, s->v.FunctionDef.name, DEF_LOCAL, LOCATION(s)))
             VISIT_QUIT(st, 0);
         if (s->v.FunctionDef.args->defaults)
             VISIT_SEQ(st, expr, s->v.FunctionDef.args->defaults);
         if (s->v.FunctionDef.args->kw_defaults)
             VISIT_SEQ_WITH_NULL(st, expr, s->v.FunctionDef.args->kw_defaults);
-        if (!symtable_visit_annotations(st, s->v.FunctionDef.args,
+        if (!symtable_visit_annotations(st, s, s->v.FunctionDef.args,
                                         s->v.FunctionDef.returns))
             VISIT_QUIT(st, 0);
         if (s->v.FunctionDef.decorator_list)
             VISIT_SEQ(st, expr, s->v.FunctionDef.decorator_list);
         if (!symtable_enter_block(st, s->v.FunctionDef.name,
-                                  FunctionBlock, (void *)s, s->lineno,
-                                  s->col_offset))
+                                  FunctionBlock, (void *)s,
+                                  LOCATION(s)))
             VISIT_QUIT(st, 0);
         VISIT(st, arguments, s->v.FunctionDef.args);
         VISIT_SEQ(st, stmt, s->v.FunctionDef.body);
@@ -1199,14 +1228,15 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
         break;
     case ClassDef_kind: {
         PyObject *tmp;
-        if (!symtable_add_def(st, s->v.ClassDef.name, DEF_LOCAL))
+        if (!symtable_add_def(st, s->v.ClassDef.name, DEF_LOCAL, LOCATION(s)))
             VISIT_QUIT(st, 0);
         VISIT_SEQ(st, expr, s->v.ClassDef.bases);
         VISIT_SEQ(st, keyword, s->v.ClassDef.keywords);
         if (s->v.ClassDef.decorator_list)
             VISIT_SEQ(st, expr, s->v.ClassDef.decorator_list);
         if (!symtable_enter_block(st, s->v.ClassDef.name, ClassBlock,
-                                  (void *)s, s->lineno, s->col_offset))
+                                  (void *)s, s->lineno, s->col_offset,
+                                  s->end_lineno, s->end_col_offset))
             VISIT_QUIT(st, 0);
         tmp = st->st_private;
         st->st_private = s->v.ClassDef.name;
@@ -1242,19 +1272,21 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
                 PyErr_Format(PyExc_SyntaxError,
                              cur & DEF_GLOBAL ? GLOBAL_ANNOT : NONLOCAL_ANNOT,
                              e_name->v.Name.id);
-                PyErr_SyntaxLocationObject(st->st_filename,
-                                           s->lineno,
-                                           s->col_offset + 1);
+                PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                                 s->lineno,
+                                                 s->col_offset + 1,
+                                                 s->end_lineno,
+                                                 s->end_col_offset + 1);
                 VISIT_QUIT(st, 0);
             }
             if (s->v.AnnAssign.simple &&
                 !symtable_add_def(st, e_name->v.Name.id,
-                                  DEF_ANNOT | DEF_LOCAL)) {
+                                  DEF_ANNOT | DEF_LOCAL, LOCATION(e_name))) {
                 VISIT_QUIT(st, 0);
             }
             else {
                 if (s->v.AnnAssign.value
-                    && !symtable_add_def(st, e_name->v.Name.id, DEF_LOCAL)) {
+                    && !symtable_add_def(st, e_name->v.Name.id, DEF_LOCAL, LOCATION(e_name))) {
                     VISIT_QUIT(st, 0);
                 }
             }
@@ -1262,7 +1294,10 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
         else {
             VISIT(st, expr, s->v.AnnAssign.target);
         }
-        VISIT(st, expr, s->v.AnnAssign.annotation);
+        if (!symtable_visit_annotation(st, s->v.AnnAssign.annotation)) {
+            VISIT_QUIT(st, 0);
+        }
+
         if (s->v.AnnAssign.value) {
             VISIT(st, expr, s->v.AnnAssign.value);
         }
@@ -1291,6 +1326,10 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
         if (s->v.If.orelse)
             VISIT_SEQ(st, stmt, s->v.If.orelse);
         break;
+    case Match_kind:
+        VISIT(st, expr, s->v.Match.subject);
+        VISIT_SEQ(st, match_case, s->v.Match.cases);
+        break;
     case Raise_kind:
         if (s->v.Raise.exc) {
             VISIT(st, expr, s->v.Raise.exc);
@@ -1318,7 +1357,7 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
         break;
     case Global_kind: {
         int i;
-        asdl_seq *seq = s->v.Global.names;
+        asdl_identifier_seq *seq = s->v.Global.names;
         for (i = 0; i < asdl_seq_LEN(seq); i++) {
             identifier name = (identifier)asdl_seq_GET(seq, i);
             long cur = symtable_lookup(st, name);
@@ -1337,21 +1376,24 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
                 }
                 PyErr_Format(PyExc_SyntaxError,
                              msg, name);
-                PyErr_SyntaxLocationObject(st->st_filename,
-                                           s->lineno,
-                                           s->col_offset + 1);
+                PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                                 s->lineno,
+                                                 s->col_offset + 1,
+                                                 s->end_lineno,
+                                                 s->end_col_offset + 1);
                 VISIT_QUIT(st, 0);
             }
-            if (!symtable_add_def(st, name, DEF_GLOBAL))
+            if (!symtable_add_def(st, name, DEF_GLOBAL, LOCATION(s)))
                 VISIT_QUIT(st, 0);
-            if (!symtable_record_directive(st, name, s->lineno, s->col_offset))
+            if (!symtable_record_directive(st, name, s->lineno, s->col_offset,
+                                           s->end_lineno, s->end_col_offset))
                 VISIT_QUIT(st, 0);
         }
         break;
     }
     case Nonlocal_kind: {
         int i;
-        asdl_seq *seq = s->v.Nonlocal.names;
+        asdl_identifier_seq *seq = s->v.Nonlocal.names;
         for (i = 0; i < asdl_seq_LEN(seq); i++) {
             identifier name = (identifier)asdl_seq_GET(seq, i);
             long cur = symtable_lookup(st, name);
@@ -1369,14 +1411,17 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
                     msg = NONLOCAL_AFTER_ASSIGN;
                 }
                 PyErr_Format(PyExc_SyntaxError, msg, name);
-                PyErr_SyntaxLocationObject(st->st_filename,
-                                           s->lineno,
-                                           s->col_offset + 1);
+                PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                                 s->lineno,
+                                                 s->col_offset + 1,
+                                                 s->end_lineno,
+                                                 s->end_col_offset + 1);
                 VISIT_QUIT(st, 0);
             }
-            if (!symtable_add_def(st, name, DEF_NONLOCAL))
+            if (!symtable_add_def(st, name, DEF_NONLOCAL, LOCATION(s)))
                 VISIT_QUIT(st, 0);
-            if (!symtable_record_directive(st, name, s->lineno, s->col_offset))
+            if (!symtable_record_directive(st, name, s->lineno, s->col_offset,
+                                           s->end_lineno, s->end_col_offset))
                 VISIT_QUIT(st, 0);
         }
         break;
@@ -1394,21 +1439,22 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
         VISIT_SEQ(st, stmt, s->v.With.body);
         break;
     case AsyncFunctionDef_kind:
-        if (!symtable_add_def(st, s->v.AsyncFunctionDef.name, DEF_LOCAL))
+        if (!symtable_add_def(st, s->v.AsyncFunctionDef.name, DEF_LOCAL, LOCATION(s)))
             VISIT_QUIT(st, 0);
         if (s->v.AsyncFunctionDef.args->defaults)
             VISIT_SEQ(st, expr, s->v.AsyncFunctionDef.args->defaults);
         if (s->v.AsyncFunctionDef.args->kw_defaults)
             VISIT_SEQ_WITH_NULL(st, expr,
                                 s->v.AsyncFunctionDef.args->kw_defaults);
-        if (!symtable_visit_annotations(st, s->v.AsyncFunctionDef.args,
+        if (!symtable_visit_annotations(st, s, s->v.AsyncFunctionDef.args,
                                         s->v.AsyncFunctionDef.returns))
             VISIT_QUIT(st, 0);
         if (s->v.AsyncFunctionDef.decorator_list)
             VISIT_SEQ(st, expr, s->v.AsyncFunctionDef.decorator_list);
         if (!symtable_enter_block(st, s->v.AsyncFunctionDef.name,
-                                  FunctionBlock, (void *)s, s->lineno,
-                                  s->col_offset))
+                                  FunctionBlock, (void *)s,
+                                  s->lineno, s->col_offset,
+                                  s->end_lineno, s->end_col_offset))
             VISIT_QUIT(st, 0);
         st->st_cur->ste_coroutine = 1;
         VISIT(st, arguments, s->v.AsyncFunctionDef.args);
@@ -1454,9 +1500,11 @@ symtable_extend_namedexpr_scope(struct symtable *st, expr_ty e)
             long target_in_scope = _PyST_GetSymbol(ste, target_name);
             if (target_in_scope & DEF_COMP_ITER) {
                 PyErr_Format(PyExc_SyntaxError, NAMED_EXPR_COMP_CONFLICT, target_name);
-                PyErr_SyntaxLocationObject(st->st_filename,
-                                            e->lineno,
-                                            e->col_offset);
+                PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                                  e->lineno,
+                                                  e->col_offset + 1,
+                                                  e->end_lineno,
+                                                  e->end_col_offset + 1);
                 VISIT_QUIT(st, 0);
             }
             continue;
@@ -1466,32 +1514,34 @@ symtable_extend_namedexpr_scope(struct symtable *st, expr_ty e)
         if (ste->ste_type == FunctionBlock) {
             long target_in_scope = _PyST_GetSymbol(ste, target_name);
             if (target_in_scope & DEF_GLOBAL) {
-                if (!symtable_add_def(st, target_name, DEF_GLOBAL))
+                if (!symtable_add_def(st, target_name, DEF_GLOBAL, LOCATION(e)))
                     VISIT_QUIT(st, 0);
             } else {
-                if (!symtable_add_def(st, target_name, DEF_NONLOCAL))
+                if (!symtable_add_def(st, target_name, DEF_NONLOCAL, LOCATION(e)))
                     VISIT_QUIT(st, 0);
             }
-            if (!symtable_record_directive(st, target_name, e->lineno, e->col_offset))
+            if (!symtable_record_directive(st, target_name, LOCATION(e)))
                 VISIT_QUIT(st, 0);
 
-            return symtable_add_def_helper(st, target_name, DEF_LOCAL, ste);
+            return symtable_add_def_helper(st, target_name, DEF_LOCAL, ste, LOCATION(e));
         }
         /* If we find a ModuleBlock entry, add as GLOBAL */
         if (ste->ste_type == ModuleBlock) {
-            if (!symtable_add_def(st, target_name, DEF_GLOBAL))
+            if (!symtable_add_def(st, target_name, DEF_GLOBAL, LOCATION(e)))
                 VISIT_QUIT(st, 0);
-            if (!symtable_record_directive(st, target_name, e->lineno, e->col_offset))
+            if (!symtable_record_directive(st, target_name, LOCATION(e)))
                 VISIT_QUIT(st, 0);
 
-            return symtable_add_def_helper(st, target_name, DEF_GLOBAL, ste);
+            return symtable_add_def_helper(st, target_name, DEF_GLOBAL, ste, LOCATION(e));
         }
         /* Disallow usage in ClassBlock */
         if (ste->ste_type == ClassBlock) {
             PyErr_Format(PyExc_SyntaxError, NAMED_EXPR_COMP_IN_CLASS);
-            PyErr_SyntaxLocationObject(st->st_filename,
-                                        e->lineno,
-                                        e->col_offset);
+            PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                              e->lineno,
+                                              e->col_offset + 1,
+                                              e->end_lineno,
+                                              e->end_col_offset + 1);
             VISIT_QUIT(st, 0);
         }
     }
@@ -1509,9 +1559,11 @@ symtable_handle_namedexpr(struct symtable *st, expr_ty e)
     if (st->st_cur->ste_comp_iter_expr > 0) {
         /* Assignment isn't allowed in a comprehension iterable expression */
         PyErr_Format(PyExc_SyntaxError, NAMED_EXPR_COMP_ITER_EXPR);
-        PyErr_SyntaxLocationObject(st->st_filename,
-                                    e->lineno,
-                                    e->col_offset);
+        PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                          e->lineno,
+                                          e->col_offset + 1,
+                                          e->end_lineno,
+                                          e->end_col_offset + 1);
         return 0;
     }
     if (st->st_cur->ste_comprehension) {
@@ -1534,6 +1586,9 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
     }
     switch (e->kind) {
     case NamedExpr_kind:
+        if (!symtable_raise_if_annotation_block(st, "named expression", e)) {
+            VISIT_QUIT(st, 0);
+        }
         if(!symtable_handle_namedexpr(st, e))
             VISIT_QUIT(st, 0);
         break;
@@ -1555,8 +1610,9 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
         if (e->v.Lambda.args->kw_defaults)
             VISIT_SEQ_WITH_NULL(st, expr, e->v.Lambda.args->kw_defaults);
         if (!symtable_enter_block(st, lambda,
-                                  FunctionBlock, (void *)e, e->lineno,
-                                  e->col_offset))
+                                  FunctionBlock, (void *)e,
+                                  e->lineno, e->col_offset,
+                                  e->end_lineno, e->end_col_offset))
             VISIT_QUIT(st, 0);
         VISIT(st, arguments, e->v.Lambda.args);
         VISIT(st, expr, e->v.Lambda.body);
@@ -1593,15 +1649,30 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
             VISIT_QUIT(st, 0);
         break;
     case Yield_kind:
+        if (!symtable_raise_if_annotation_block(st, "yield expression", e)) {
+            VISIT_QUIT(st, 0);
+        }
         if (e->v.Yield.value)
             VISIT(st, expr, e->v.Yield.value);
         st->st_cur->ste_generator = 1;
+        if (st->st_cur->ste_comprehension) {
+            return symtable_raise_if_comprehension_block(st, e);
+        }
         break;
     case YieldFrom_kind:
+        if (!symtable_raise_if_annotation_block(st, "yield expression", e)) {
+            VISIT_QUIT(st, 0);
+        }
         VISIT(st, expr, e->v.YieldFrom.value);
         st->st_cur->ste_generator = 1;
+        if (st->st_cur->ste_comprehension) {
+            return symtable_raise_if_comprehension_block(st, e);
+        }
         break;
     case Await_kind:
+        if (!symtable_raise_if_annotation_block(st, "await expression", e)) {
+            VISIT_QUIT(st, 0);
+        }
         VISIT(st, expr, e->v.Await.value);
         st->st_cur->ste_coroutine = 1;
         break;
@@ -1646,14 +1717,14 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
         break;
     case Name_kind:
         if (!symtable_add_def(st, e->v.Name.id,
-                              e->v.Name.ctx == Load ? USE : DEF_LOCAL))
+                              e->v.Name.ctx == Load ? USE : DEF_LOCAL, LOCATION(e)))
             VISIT_QUIT(st, 0);
         /* Special-case super: it counts as a use of __class__ */
         if (e->v.Name.ctx == Load &&
             st->st_cur->ste_type == FunctionBlock &&
             _PyUnicode_EqualToASCIIString(e->v.Name.id, "super")) {
             if (!GET_IDENTIFIER(__class__) ||
-                !symtable_add_def(st, __class__, USE))
+                !symtable_add_def(st, __class__, USE, LOCATION(e)))
                 VISIT_QUIT(st, 0);
         }
         break;
@@ -1669,12 +1740,62 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
 }
 
 static int
+symtable_visit_pattern(struct symtable *st, pattern_ty p)
+{
+    if (++st->recursion_depth > st->recursion_limit) {
+        PyErr_SetString(PyExc_RecursionError,
+                        "maximum recursion depth exceeded during compilation");
+        VISIT_QUIT(st, 0);
+    }
+    switch (p->kind) {
+    case MatchValue_kind:
+        VISIT(st, expr, p->v.MatchValue.value);
+        break;
+    case MatchSingleton_kind:
+        /* Nothing to do here. */
+        break;
+    case MatchSequence_kind:
+        VISIT_SEQ(st, pattern, p->v.MatchSequence.patterns);
+        break;
+    case MatchStar_kind:
+        if (p->v.MatchStar.name) {
+            symtable_add_def(st, p->v.MatchStar.name, DEF_LOCAL, LOCATION(p));
+        }
+        break;
+    case MatchMapping_kind:
+        VISIT_SEQ(st, expr, p->v.MatchMapping.keys);
+        VISIT_SEQ(st, pattern, p->v.MatchMapping.patterns);
+        if (p->v.MatchMapping.rest) {
+            symtable_add_def(st, p->v.MatchMapping.rest, DEF_LOCAL, LOCATION(p));
+        }
+        break;
+    case MatchClass_kind:
+        VISIT(st, expr, p->v.MatchClass.cls);
+        VISIT_SEQ(st, pattern, p->v.MatchClass.patterns);
+        VISIT_SEQ(st, pattern, p->v.MatchClass.kwd_patterns);
+        break;
+    case MatchAs_kind:
+        if (p->v.MatchAs.pattern) {
+            VISIT(st, pattern, p->v.MatchAs.pattern);
+        }
+        if (p->v.MatchAs.name) {
+            symtable_add_def(st, p->v.MatchAs.name, DEF_LOCAL, LOCATION(p));
+        }
+        break;
+    case MatchOr_kind:
+        VISIT_SEQ(st, pattern, p->v.MatchOr.patterns);
+        break;
+    }
+    VISIT_QUIT(st, 1);
+}
+
+static int
 symtable_implicit_arg(struct symtable *st, int pos)
 {
     PyObject *id = PyUnicode_FromFormat(".%d", pos);
     if (id == NULL)
         return 0;
-    if (!symtable_add_def(st, id, DEF_PARAM)) {
+    if (!symtable_add_def(st, id, DEF_PARAM, ST_LOCATION(st->st_cur))) {
         Py_DECREF(id);
         return 0;
     }
@@ -1683,7 +1804,7 @@ symtable_implicit_arg(struct symtable *st, int pos)
 }
 
 static int
-symtable_visit_params(struct symtable *st, asdl_seq *args)
+symtable_visit_params(struct symtable *st, asdl_arg_seq *args)
 {
     int i;
 
@@ -1692,7 +1813,7 @@ symtable_visit_params(struct symtable *st, asdl_seq *args)
 
     for (i = 0; i < asdl_seq_LEN(args); i++) {
         arg_ty arg = (arg_ty)asdl_seq_GET(args, i);
-        if (!symtable_add_def(st, arg->arg, DEF_PARAM))
+        if (!symtable_add_def(st, arg->arg, DEF_PARAM, LOCATION(arg)))
             return 0;
     }
 
@@ -1700,7 +1821,25 @@ symtable_visit_params(struct symtable *st, asdl_seq *args)
 }
 
 static int
-symtable_visit_argannotations(struct symtable *st, asdl_seq *args)
+symtable_visit_annotation(struct symtable *st, expr_ty annotation)
+{
+    int future_annotations = st->st_future->ff_features & CO_FUTURE_ANNOTATIONS;
+    if (future_annotations &&
+        !symtable_enter_block(st, GET_IDENTIFIER(_annotation), AnnotationBlock,
+                              (void *)annotation, annotation->lineno,
+                              annotation->col_offset, annotation->end_lineno,
+                              annotation->end_col_offset)) {
+        VISIT_QUIT(st, 0);
+    }
+    VISIT(st, expr, annotation);
+    if (future_annotations && !symtable_exit_block(st)) {
+        VISIT_QUIT(st, 0);
+    }
+    return 1;
+}
+
+static int
+symtable_visit_argannotations(struct symtable *st, asdl_arg_seq *args)
 {
     int i;
 
@@ -1717,8 +1856,15 @@ symtable_visit_argannotations(struct symtable *st, asdl_seq *args)
 }
 
 static int
-symtable_visit_annotations(struct symtable *st, arguments_ty a, expr_ty returns)
+symtable_visit_annotations(struct symtable *st, stmt_ty o, arguments_ty a, expr_ty returns)
 {
+    int future_annotations = st->st_future->ff_features & CO_FUTURE_ANNOTATIONS;
+    if (future_annotations &&
+        !symtable_enter_block(st, GET_IDENTIFIER(_annotation), AnnotationBlock,
+                              (void *)o, o->lineno, o->col_offset, o->end_lineno,
+                              o->end_col_offset)) {
+        VISIT_QUIT(st, 0);
+    }
     if (a->posonlyargs && !symtable_visit_argannotations(st, a->posonlyargs))
         return 0;
     if (a->args && !symtable_visit_argannotations(st, a->args))
@@ -1729,8 +1875,12 @@ symtable_visit_annotations(struct symtable *st, arguments_ty a, expr_ty returns)
         VISIT(st, expr, a->kwarg->annotation);
     if (a->kwonlyargs && !symtable_visit_argannotations(st, a->kwonlyargs))
         return 0;
-    if (returns)
-        VISIT(st, expr, returns);
+    if (future_annotations && !symtable_exit_block(st)) {
+        VISIT_QUIT(st, 0);
+    }
+    if (returns && !symtable_visit_annotation(st, returns)) {
+        VISIT_QUIT(st, 0);
+    }
     return 1;
 }
 
@@ -1747,12 +1897,12 @@ symtable_visit_arguments(struct symtable *st, arguments_ty a)
     if (a->kwonlyargs && !symtable_visit_params(st, a->kwonlyargs))
         return 0;
     if (a->vararg) {
-        if (!symtable_add_def(st, a->vararg->arg, DEF_PARAM))
+        if (!symtable_add_def(st, a->vararg->arg, DEF_PARAM, LOCATION(a->vararg)))
             return 0;
         st->st_cur->ste_varargs = 1;
     }
     if (a->kwarg) {
-        if (!symtable_add_def(st, a->kwarg->arg, DEF_PARAM))
+        if (!symtable_add_def(st, a->kwarg->arg, DEF_PARAM, LOCATION(a->kwarg)))
             return 0;
         st->st_cur->ste_varkeywords = 1;
     }
@@ -1766,7 +1916,7 @@ symtable_visit_excepthandler(struct symtable *st, excepthandler_ty eh)
     if (eh->v.ExceptHandler.type)
         VISIT(st, expr, eh->v.ExceptHandler.type);
     if (eh->v.ExceptHandler.name)
-        if (!symtable_add_def(st, eh->v.ExceptHandler.name, DEF_LOCAL))
+        if (!symtable_add_def(st, eh->v.ExceptHandler.name, DEF_LOCAL, LOCATION(eh)))
             return 0;
     VISIT_SEQ(st, stmt, eh->v.ExceptHandler.body);
     return 1;
@@ -1782,6 +1932,16 @@ symtable_visit_withitem(struct symtable *st, withitem_ty item)
     return 1;
 }
 
+static int
+symtable_visit_match_case(struct symtable *st, match_case_ty m)
+{
+    VISIT(st, pattern, m->pattern);
+    if (m->guard) {
+        VISIT(st, expr, m->guard);
+    }
+    VISIT_SEQ(st, stmt, m->body);
+    return 1;
+}
 
 static int
 symtable_visit_alias(struct symtable *st, alias_ty a)
@@ -1804,16 +1964,20 @@ symtable_visit_alias(struct symtable *st, alias_ty a)
         Py_INCREF(store_name);
     }
     if (!_PyUnicode_EqualToASCIIString(name, "*")) {
-        int r = symtable_add_def(st, store_name, DEF_IMPORT);
+        int r = symtable_add_def(st, store_name, DEF_IMPORT, LOCATION(a));
         Py_DECREF(store_name);
         return r;
     }
     else {
         if (st->st_cur->ste_type != ModuleBlock) {
-            int lineno = st->st_cur->ste_lineno;
-            int col_offset = st->st_cur->ste_col_offset;
+            int lineno = a->lineno;
+            int col_offset = a->col_offset;
+            int end_lineno = a->end_lineno;
+            int end_col_offset = a->end_col_offset;
             PyErr_SetString(PyExc_SyntaxError, IMPORT_STAR_WARNING);
-            PyErr_SyntaxLocationObject(st->st_filename, lineno, col_offset + 1);
+            PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                             lineno, col_offset + 1,
+                                             end_lineno, end_col_offset + 1);
             Py_DECREF(store_name);
             return 0;
         }
@@ -1850,7 +2014,7 @@ symtable_visit_keyword(struct symtable *st, keyword_ty k)
 
 static int
 symtable_handle_comprehension(struct symtable *st, expr_ty e,
-                              identifier scope_name, asdl_seq *generators,
+                              identifier scope_name, asdl_comprehension_seq *generators,
                               expr_ty elt, expr_ty value)
 {
     int is_generator = (e->kind == GeneratorExp_kind);
@@ -1863,13 +2027,27 @@ symtable_handle_comprehension(struct symtable *st, expr_ty e,
     /* Create comprehension scope for the rest */
     if (!scope_name ||
         !symtable_enter_block(st, scope_name, FunctionBlock, (void *)e,
-                              e->lineno, e->col_offset)) {
+                              e->lineno, e->col_offset,
+                              e->end_lineno, e->end_col_offset)) {
         return 0;
     }
+    switch(e->kind) {
+        case ListComp_kind:
+            st->st_cur->ste_comprehension = ListComprehension;
+            break;
+        case SetComp_kind:
+            st->st_cur->ste_comprehension = SetComprehension;
+            break;
+        case DictComp_kind:
+            st->st_cur->ste_comprehension = DictComprehension;
+            break;
+        default:
+            st->st_cur->ste_comprehension = GeneratorExpression;
+            break;
+    }
     if (outermost->is_async) {
         st->st_cur->ste_coroutine = 1;
     }
-    st->st_cur->ste_comprehension = 1;
 
     /* Outermost iter is received as an argument */
     if (!symtable_implicit_arg(st, 0)) {
@@ -1886,18 +2064,6 @@ symtable_handle_comprehension(struct symtable *st, expr_ty e,
     if (value)
         VISIT(st, expr, value);
     VISIT(st, expr, elt);
-    if (st->st_cur->ste_generator) {
-        PyErr_SetString(PyExc_SyntaxError,
-            (e->kind == ListComp_kind) ? "'yield' inside list comprehension" :
-            (e->kind == SetComp_kind) ? "'yield' inside set comprehension" :
-            (e->kind == DictComp_kind) ? "'yield' inside dict comprehension" :
-            "'yield' inside generator expression");
-        PyErr_SyntaxLocationObject(st->st_filename,
-                                   st->st_cur->ste_lineno,
-                                   st->st_cur->ste_col_offset + 1);
-        symtable_exit_block(st);
-        return 0;
-    }
     st->st_cur->ste_generator = is_generator;
     return symtable_exit_block(st);
 }
@@ -1934,3 +2100,62 @@ symtable_visit_dictcomp(struct symtable *st, expr_ty e)
                                          e->v.DictComp.key,
                                          e->v.DictComp.value);
 }
+
+static int
+symtable_raise_if_annotation_block(struct symtable *st, const char *name, expr_ty e)
+{
+    if (st->st_cur->ste_type != AnnotationBlock) {
+        return 1;
+    }
+
+    PyErr_Format(PyExc_SyntaxError, ANNOTATION_NOT_ALLOWED, name);
+    PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                     e->lineno,
+                                     e->col_offset + 1,
+                                     e->end_lineno,
+                                     e->end_col_offset + 1);
+    return 0;
+}
+
+static int
+symtable_raise_if_comprehension_block(struct symtable *st, expr_ty e) {
+    _Py_comprehension_ty type = st->st_cur->ste_comprehension;
+    PyErr_SetString(PyExc_SyntaxError, 
+            (type == ListComprehension) ? "'yield' inside list comprehension" :
+            (type == SetComprehension) ? "'yield' inside set comprehension" :
+            (type == DictComprehension) ? "'yield' inside dict comprehension" :
+            "'yield' inside generator expression");
+    PyErr_RangedSyntaxLocationObject(st->st_filename,
+                                     e->lineno, e->col_offset + 1,
+                                     e->end_lineno, e->end_col_offset + 1);
+    VISIT_QUIT(st, 0);
+}
+
+struct symtable *
+_Py_SymtableStringObjectFlags(const char *str, PyObject *filename,
+                              int start, PyCompilerFlags *flags)
+{
+    struct symtable *st;
+    mod_ty mod;
+    PyArena *arena;
+
+    arena = _PyArena_New();
+    if (arena == NULL)
+        return NULL;
+
+    mod = _PyParser_ASTFromString(str, filename, start, flags, arena);
+    if (mod == NULL) {
+        _PyArena_Free(arena);
+        return NULL;
+    }
+    PyFutureFeatures *future = _PyFuture_FromAST(mod, filename);
+    if (future == NULL) {
+        _PyArena_Free(arena);
+        return NULL;
+    }
+    future->ff_features |= flags->cf_flags;
+    st = _PySymtable_Build(mod, filename, future);
+    PyObject_Free((void *)future);
+    _PyArena_Free(arena);
+    return st;
+}