From e02820c9b18a867cf3f109bd62385d7450f70258 Mon Sep 17 00:00:00 2001
From: Scott Graham <scott.github@h4ck3r.net>
Date: Sun, 5 May 2024 19:13:39 -0700
Subject: [PATCH] Fix bug in reading #line filename inside #if block

---
 src/preprocess.c          | 3 ++-
 test/line_directive_bug.c | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 test/line_directive_bug.c

diff --git a/src/preprocess.c b/src/preprocess.c
index df0c993..a71257d 100644
--- 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
new file mode 100644
index 0000000..ddca712
--- /dev/null
+++ b/test/line_directive_bug.c
@@ -0,0 +1,4 @@
+#if 1
+#line 1 "file"
+#endif
+int main() {}