[ruby/prism] Fix a possible null dereference

https://github.com/ruby/prism/commit/7dbb8c7e3e
2023-10-31 10:14:34 +01:00 · 2023-10-31 10:14:34 +01:00 · 322755a007
commit 322755a007
parent d8a9245513
1 changed files with 1 additions and 0 deletions
--- a/prism/prism.c
+++ b/prism/prism.c
@ -9738,6 +9738,7 @@ parse_write(pm_parser_t *parser, pm_node_t *target, pm_token_t *operator, pm_nod
            // expression.
            if (
                (call->call_operator_loc.start == NULL) &&
+                (call->message_loc.start != NULL) &&
                (call->message_loc.start[0] == '[') &&
                (call->message_loc.end[-1] == ']') &&
                (call->block == NULL)