Hi git, I've been seeing git segfault over the past few days. I'm on Mac OS X 10.12, 64-bit, compiling with clang (Apple LLVM version 8.0.0 (clang-800.0.40)).
I first noticed it during a checkout, then also during `log -u`. I'm still debugging, but wanted to give a heads-up in case anyone else is seeing this.
~/D/S/A/HLT $ git-log -u -n1000 >/dev/null
fish: 'git-log' terminated by signal SIGSEGV (Address boundary error)
~/D/S/A/HLT $ git fsck
Checking object directories: 100% (256/256), done.
fish: 'git fsck' terminated by signal SIGSEGV (Address boundary error)
~/D/S/A/HLT $ git --version
git version 2.10.0.129.g35f6318
Running git-fsck from 2.9.2 validates the repository data.
Bisect says:
8261e1f139db3f8aa6f9fd7d98c876cbeb0f927c is the first bad commit
commit 8261e1f139db3f8aa6f9fd7d98c876cbeb0f927c
Author: Jeff King <peff@xxxxxxxx>
Date: Mon Aug 22 18:00:07 2016 -0400
delta_base_cache: use hashmap.h
Backtrace for the `log -u` case is below. I'll follow up with my progress.
-Jonathon
$ lldb /Users/jmah/Documents/Streams/git/git-log -- -u
(lldb) target create "/Users/jmah/Documents/Streams/git/git-log"
Current executable set to '/Users/jmah/Documents/Streams/git/git-log' (x86_64).
(lldb) settings set -- target.run-args "-u"
(lldb) process launch -o /dev/null
Process 92815 launched: '/Users/jmah/Documents/Streams/git/git-log' (x86_64)
Process 92815 stopped
* thread #1: tid = 0x1c30677, 0x00000001001bba80 git-log`release_delta_base_cache(ent=0xffffffffffffffd0) + 16 at sha1_file.c:2171, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x10)
frame #0: 0x00000001001bba80 git-log`release_delta_base_cache(ent=0xffffffffffffffd0) + 16 at sha1_file.c:2171
2168
2169 static inline void release_delta_base_cache(struct delta_base_cache_entry *ent)
2170 {
-> 2171 free(ent->data);
2172 detach_delta_base_cache_entry(ent);
2173 }
2174
(lldb) bt
warning: could not load any Objective-C class information. This will significantly reduce the quality of type information available.
* thread #1: tid = 0x1c30677, 0x00000001001bba80 git-log`release_delta_base_cache(ent=0xffffffffffffffd0) + 16 at sha1_file.c:2171, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x10)
* frame #0: 0x00000001001bba80 git-log`release_delta_base_cache(ent=0xffffffffffffffd0) + 16 at sha1_file.c:2171
frame #1: 0x00000001001bcadf git-log`add_delta_base_cache(p=0x00000001006062f0, base_offset=1792781, base=0x000000015749a000, base_size=1617761, type=OBJ_BLOB) + 143 at sha1_file.c:2199
frame #2: 0x00000001001bc0d6 git-log`unpack_entry(p=0x00000001006062f0, obj_offset=1792781, final_type=0x00007fff5fbfe7fc, final_size=0x000000010185a5a0) + 1590 at sha1_file.c:2345
frame #3: 0x00000001001c2209 git-log`cache_or_unpack_entry(p=0x00000001006062f0, base_offset=2692554, base_size=0x000000010185a5a0, type=0x00007fff5fbfe7fc) + 73 at sha1_file.c:2162
frame #4: 0x00000001001bed8d git-log`read_packed_sha1(sha1="?c?????}\x0e'\x81҄MH;yP?, type=0x00007fff5fbfe7fc, size=0x000000010185a5a0) + 93 at sha1_file.c:2765
frame #5: 0x00000001001bcc17 git-log`read_object(sha1="?c?????}\x0e'\x81҄MH;yP?, type=0x00007fff5fbfe7fc, size=0x000000010185a5a0) + 119 at sha1_file.c:2813
frame #6: 0x00000001001be013 git-log`read_sha1_file_extended(sha1="?c?????}\x0e'\x81҄MH;yP?, type=0x00007fff5fbfe7fc, size=0x000000010185a5a0, flag=1) + 67 at sha1_file.c:2841
frame #7: 0x00000001001073ba git-log`read_sha1_file(sha1="?c?????}\x0e'\x81҄MH;yP?, type=0x00007fff5fbfe7fc, size=0x000000010185a5a0) + 42 at cache.h:1056
frame #8: 0x0000000100106ce6 git-log`diff_populate_filespec(s=0x000000010185a570, flags=2) + 1334 at diff.c:2845
frame #9: 0x0000000100106670 git-log`diff_filespec_is_binary(one=0x000000010185a570) + 160 at diff.c:2248
frame #10: 0x00000001001124bc git-log`builtin_diff(name_a="Applications/IDE/PlugIns/IDEPlugIns/IDEPlugIns.xcodeproj/project.pbxproj", name_b="Applications/IDE/PlugIns/IDEPlugIns/IDEPlugIns.xcodeproj/project.pbxproj", one=0x000000010185a570, two=0x0000000101878310, xfrm_msg="index e063d6f..288f95f 100644\n", must_show_header=0, o=0x00007fff5fbff4b8, complete_rewrite=0) + 1852 at diff.c:2383
frame #11: 0x00000001001116ce git-log`run_diff_cmd(pgm=0x0000000000000000, name="Applications/IDE/PlugIns/IDEPlugIns/IDEPlugIns.xcodeproj/project.pbxproj", other=0x0000000000000000, attr_path="Applications/IDE/PlugIns/IDEPlugIns/IDEPlugIns.xcodeproj/project.pbxproj", one=0x000000010185a570, two=0x0000000101878310, msg=0x00007fff5fbfed18, o=0x00007fff5fbff4b8, p=0x000000010186c130) + 734 at diff.c:3134
frame #12: 0x0000000100111350 git-log`run_diff(p=0x000000010186c130, o=0x00007fff5fbff4b8) + 720 at diff.c:3222
frame #13: 0x000000010010d75d git-log`diff_flush_patch(p=0x000000010186c130, o=0x00007fff5fbff4b8) + 157 at diff.c:4202
frame #14: 0x000000010010b9bc git-log`diff_flush(options=0x00007fff5fbff4b8) + 1148 at diff.c:4722
frame #15: 0x000000010014418b git-log`log_tree_diff_flush(opt=0x00007fff5fbfefc0) + 507 at log-tree.c:781
frame #16: 0x00000001001445fe git-log`log_tree_diff(opt=0x00007fff5fbfefc0, commit=0x0000000153506540, log=0x00007fff5fbfeed8) + 606 at log-tree.c:848
frame #17: 0x000000010014428e git-log`log_tree_commit(opt=0x00007fff5fbfefc0, commit=0x0000000153506540) + 238 at log-tree.c:877
frame #18: 0x0000000100064b89 git-log`cmd_log_walk(rev=0x00007fff5fbfefc0) + 185 at log.c:360
frame #19: 0x0000000100066405 git-log`cmd_log(argc=2, argv=0x00007fff5fbff9d0, prefix=0x0000000000000000) + 309 at log.c:682
frame #20: 0x000000010000274f git-log`run_builtin(p=0x0000000100264970, argc=2, argv=0x00007fff5fbff9d0) + 431 at git.c:352
frame #21: 0x0000000100001a9a git-log`handle_builtin(argc=2, argv=0x00007fff5fbff9d0) + 138 at git.c:539
frame #22: 0x00000001000017e4 git-log`cmd_main(argc=2, argv=0x00007fff5fbff9d0) + 116 at git.c:635
frame #23: 0x00000001000c9eb4 git-log`main(argc=2, argv=0x00007fff5fbff9d0) + 68 at common-main.c:40
frame #24: 0x00007fffd87ff255 libdyld.dylib`start + 1