bpo-39307: Fix memory leak on error path in parsetok (GH-17953)

alexhenrie · pablogsal · commit 7ba6f18de258 · 2020-01-13T10:35:47.000Z
diff --git a/Parser/parsetok.c b/Parser/parsetok.c
@@ -246,6 +246,7 @@ parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret,
 
     if ((ps = PyParser_New(g, start)) == NULL) {
         err_ret->error = E_NOMEM;
+        growable_comment_array_deallocate(&type_ignores);
         PyTokenizer_Free(tok);
         return NULL;
     }

Original file line number	Diff line number	Diff line change
`@@ -246,6 +246,7 @@ parsetok(struct tok_state tok, grammar g, int start, perrdetail *err_ret,`
`246`	`246`
`247`	`247`	`if ((ps = PyParser_New(g, start)) == NULL) {`
`248`	`248`	`err_ret->error = E_NOMEM;`
	`249`	`+ growable_comment_array_deallocate(&type_ignores);`
`249`	`250`	`PyTokenizer_Free(tok);`
`250`	`251`	`return NULL;`
`251`	`252`	`}`