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bug#49261: Segfault during loadup
From: |
Lars Ingebrigtsen |
Subject: |
bug#49261: Segfault during loadup |
Date: |
Thu, 08 Jul 2021 02:09:45 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
To reproduce:
make bootstrap; touch lisp/*.el; make
...
make[2]: *** [Makefile:279: ../lisp/cus-start.elc] Error 139
make[1]: *** [Makefile:765: ../lisp/cus-start.elc] Error 2
/bin/sh: line 2: 113032 Segmentation fault (core dumped)
I bisected this, and git bisect pointed me to:
commit 6cf62141c4467314f67c2ef75a4bf94d41ff050f
Author: Paul Eggert <eggert@cs.ucla.edu>
AuthorDate: Sat Sep 5 12:13:32 2020 -0700
Reinstall recent GC-related changes
The report that they broke macOS was a false alarm, as the
previous commit was also broken (Bug#43152#62).
Running under gdb after the "make" fails:
gdb ./bootstrap-emacs
run -batch --no-site-file --no-site-lisp --eval '(setq load-prefer-newer t)'
-l bytecomp -f byte-compile-refresh-preloaded -f batch-byte-compile
../lisp/abbrev.elb
#0 0x00005555557103a7 in AREF (idx=23456123314108, array=0x7ffff1a398cd)
at lisp.h:731
#1 HASH_KEY (idx=11728061657054, h=0x7ffff1a39848) at lisp.h:2374
#2 hash_lookup (h=0x7ffff1a39848, key=0x555555cae444, hash=hash@entry=0x0)
at fns.c:4479
...
There seems to be a corruption in the hash tables somewhere. It's
totally reproducible with the recipe, but I haven't found more
self-contained example to reproduce it.
This does not show up with -O0, but does show up with -O1 and -O2.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, (continued)
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: Segfault during loadup,
Lars Ingebrigtsen <=
- bug#49261: Segfault during loadup, Eli Zaretskii, 2021/07/08
- bug#49261: Segfault during loadup, Lars Ingebrigtsen, 2021/07/08
- bug#49261: Segfault during loadup, Paul Eggert, 2021/07/11
- bug#49261: Segfault during loadup, Eli Zaretskii, 2021/07/11
- bug#49261: Segfault during loadup, Eli Zaretskii, 2021/07/11
- bug#49261: Segfault during loadup, Paul Eggert, 2021/07/12
- bug#49261: Segfault during loadup, Eli Zaretskii, 2021/07/12
- bug#49261: Segfault during loadup, Paul Eggert, 2021/07/12
- bug#49261: Segfault during loadup, Andreas Schwab, 2021/07/12
- bug#49261: Segfault during loadup, Eli Zaretskii, 2021/07/12