Fix bug in reading #line filename inside #if block

sgraham · May 6, 2024 · e02820c · e02820c
1 parent cc94458
commit e02820c
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/src/preprocess.c b/src/preprocess.c
@@ -844,7 +844,8 @@ static Token* include_file(Token* tok, char* path, Token* filename_tok) {
 // Read #line arguments
 static void read_line_marker(Token** rest, Token* tok) {
   Token* start = tok;
-  tok = preprocess(copy_line(rest, tok));
+  tok = preprocess2(copy_line(rest, tok));
+  convert_pp_tokens(tok);
 
   if (tok->kind != TK_NUM || tok->ty->kind != TY_INT)
     error_tok(tok, "invalid line marker");

diff --git a/test/line_directive_bug.c b/test/line_directive_bug.c
@@ -0,0 +1,4 @@
+#if 1
+#line 1 "file"
+#endif
+int main() {}