Issue #29319: Prevent RunMainFromImporter overwriting sys.path[0].

1 files changed, 12 insertions, 2 deletions

diff --git a/Parser/pgenmain.c b/Parser/pgenmain.c
index 0f055d6308..e386248c2f 100644
--- a/Parser/pgenmain.c
+++ b/Parser/pgenmain.c
@@ -27,7 +27,7 @@ int Py_VerboseFlag;
 int Py_IgnoreEnvironmentFlag;
 
 /* Forward */
-grammar *getgrammar(char *filename);
+grammar *getgrammar(const char *filename);
 
 void Py_Exit(int) _Py_NO_RETURN;
 
@@ -37,6 +37,15 @@ Py_Exit(int sts)
     exit(sts);
 }
 
+#ifdef WITH_THREAD
+/* Needed by obmalloc.c */
+int PyGILState_Check(void)
+{ return 1; }
+#endif
+
+void _PyMem_DumpTraceback(int fd, const void *ptr)
+{}
+
 int
 main(int argc, char **argv)
 {
@@ -71,12 +80,13 @@ main(int argc, char **argv)
         printf("Writing %s ...\n", graminit_h);
     printnonterminals(g, fp);
     fclose(fp);
+    freegrammar(g);
     Py_Exit(0);
     return 0; /* Make gcc -Wall happy */
 }
 
 grammar *
-getgrammar(char *filename)
+getgrammar(const char *filename)
 {
     FILE *fp;
     node *n;