[arc][getopt]fix enforcment of RequiredArgument().DisableSpaceParse()

commit_hash:9c2ada5b95be3f810d2750406d74d839bd2598ff

1 files changed, 6 insertions, 1 deletions

diff --git a/library/cpp/getopt/small/last_getopt_parser.cpp b/library/cpp/getopt/small/last_getopt_parser.cpp
index 911c76f342..98c3951a1c 100644
--- a/library/cpp/getopt/small/last_getopt_parser.cpp
+++ b/library/cpp/getopt/small/last_getopt_parser.cpp
@@ -170,9 +170,14 @@ namespace NLastGetopt {
 
     bool TOptsParser::ParseOptParam(const TOpt* opt, size_t pos) {
         Y_ASSERT(opt);
-        if (opt->GetHasArg() == NO_ARGUMENT || opt->IsEqParseOnly()) {
+        if (opt->GetHasArg() == NO_ARGUMENT ||
+            opt->GetHasArg() == OPTIONAL_ARGUMENT && opt->IsEqParseOnly()) {
             return Commit(opt, nullptr, pos, 0);
         }
+        if (opt->IsEqParseOnly()) {
+            Y_ASSERT(opt->GetHasArg() == REQUIRED_ARGUMENT);
+            throw TUsageException() << "option " << opt->ToShortString() << " requires an argument but only accepts it over =";
+        }
         if (pos == Argc_) {
             if (opt->GetHasArg() == REQUIRED_ARGUMENT)
                 throw TUsageException() << "option " << opt->ToShortString() << " must have arg";