I ran into a segfault with patch(1) in a port, here's a test case with a
minimal reproducer.
$ echo foo > test
$ perl -e 'print "--- test.orig\n+++ test\n@@ -1,1 +1,2 @@\n foo\n+" . 'x' x
32768 . "\n\\ No newline at end of file\n"' > test.patch
$ patch < test.patch
Hmm... Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|--- test.orig
|+++ test
--------------------------
Patching file test using Plan A...
Segmentation fault (core dumped)
$ egdb -q /usr/src/usr.bin/patch/obj/patch patch.core
Reading symbols from /usr/src/usr.bin/patch/obj/patch...
[New process 276205]
Core was generated by `patch'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00000f18920a76e0 in another_hunk () at /usr/src/usr.bin/patch/pch.c:1008
1008 s[p_len[filldst - 1]] =
0;
(gdb) list
1003 p_line[filldst] = s;
1004 p_len[filldst++] = strlen(s);
1005 if (fillsrc > p_ptrn_lines) {
1006 if (remove_special_line()) {
1007 p_len[filldst - 1] -= 1;
1008 s[p_len[filldst - 1]] =
0;
1009 }
1010 }
1011 break;
1012 default:
(gdb) quit
$
