[ruby/prism] fix: sigsegv on malformed shebang

Stranger6667 · matzbot · commit 4e5c8c19a722 · 2025-06-30T12:31:53.000Z
Signed-off-by: Dmitry Dygalo <dmitry@dygalo.dev> ruby/prism@e23292120e
diff --git a/prism/prism.c b/prism/prism.c
@@ -22676,7 +22676,7 @@ pm_parser_init(pm_parser_t *parser, const uint8_t *source, size_t size, const pm
             }
 
             search_shebang = false;
-        } else if (options->main_script && !parser->parsing_eval) {
+        } else if (options != NULL && options->main_script && !parser->parsing_eval) {
             search_shebang = true;
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -22676,7 +22676,7 @@ pm_parser_init(pm_parser_t parser, const uint8_t source, size_t size, const pm`
`22676`	`22676`	`}`
`22677`	`22677`
`22678`	`22678`	`search_shebang = false;`
`22679`		`- } else if (options->main_script && !parser->parsing_eval) {`
	`22679`	`+ } else if (options != NULL && options->main_script && !parser->parsing_eval) {`
`22680`	`22680`	`search_shebang = true;`
`22681`	`22681`	`}`
`22682`	`22682`	`}`