Fix infinite loop in parser_lex_magic_comment

kddnewton · kddnewton · commit ec3162cafc60 · 2026-03-17T11:14:11.000-04:00
diff --git a/prism/prism.c b/prism/prism.c
@@ -7562,7 +7562,7 @@ parser_lex_magic_comment(pm_parser_t *parser, bool semantic_token_seen) {
     cursor = start;
     while (cursor < end) {
         if (indicator) {
-            cursor += pm_strspn_whitespace(cursor, end - cursor);
+            while (cursor < end && (pm_char_is_magic_comment_key_delimiter(*cursor) || pm_char_is_whitespace(*cursor))) cursor++;
         }
 
         const uint8_t *key_start = cursor;

Original file line number	Diff line number	Diff line change
`@@ -7562,7 +7562,7 @@ parser_lex_magic_comment(pm_parser_t *parser, bool semantic_token_seen) {`
`7562`	`7562`	`cursor = start;`
`7563`	`7563`	`while (cursor < end) {`
`7564`	`7564`	`if (indicator) {`
`7565`		`- cursor += pm_strspn_whitespace(cursor, end - cursor);`
	`7565`	`+ while (cursor < end && (pm_char_is_magic_comment_key_delimiter(cursor) \|\| pm_char_is_whitespace(cursor))) cursor++;`
`7566`	`7566`	`}`
`7567`	`7567`
`7568`	`7568`	`const uint8_t *key_start = cursor;`