From d0a11e24e0639ba402be3dec522e0dfff9ba45fc Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Tue, 9 Apr 2024 17:58:50 +0200
Subject: fix

---
 io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io.c b/io.c
index d85d8d3..f58734c 100644
--- a/io.c
+++ b/io.c
@@ -818,7 +818,7 @@ vdiag(const struct span *span, enum diagkind kind, const char *fmt, va_list ap)
 
       /* find start of line */
       for (i = loc->off - 1; i + 1 > 0 && f->p[i] != '\n'; --i) ;
-      if (i) ++i;
+      if (i || f->p[i] == '\n') ++i;
 
       nmark = loc->len;
       while (i < loc->off + loc->len) {
-- 
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