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-rw-r--r--toys/posix/sed.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/toys/posix/sed.c b/toys/posix/sed.c
index 9bd05034..d5a4a833 100644
--- a/toys/posix/sed.c
+++ b/toys/posix/sed.c
@@ -443,7 +443,7 @@ static void sed_line(char **pline, long plen)
// If we're replacing only a specific match, skip if this isn't it
off = command->sflags>>4;
if (off && off != ++count) {
- memcpy(l2+l2used, rline, match[0].rm_eo);
+ if (l2) memcpy(l2+l2used, rline, match[0].rm_eo);
l2used += match[0].rm_eo;
rline += match[0].rm_eo;