Attached is a debdiff which fixes this problem on Bionic
** Also affects: libunwind (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: libunwind (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: libunwind (Ubuntu)
Status: New => Fix Released
** Changed in: libunwind (Ubuntu Bionic)
Status: New => In Progress
** Changed in: libunwind (Ubuntu Focal)
Status: New => In Progress
** Changed in: libunwind (Ubuntu Bionic)
Importance: Undecided => Medium
** Changed in: libunwind (Ubuntu Focal)
Importance: Undecided => Medium
** Changed in: libunwind (Ubuntu Bionic)
Assignee: (unassigned) => Matthew Ruffell (mruffell)
** Changed in: libunwind (Ubuntu Focal)
Assignee: (unassigned) => Matthew Ruffell (mruffell)
** Patch added: "Debdiff for libunwind on Bionic"
https://bugs.launchpad.net/ubuntu/+source/libunwind/+bug/1999104/+attachment/5635450/+files/lp1999104_bionic.debdiff
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https://bugs.launchpad.net/bugs/1999104
Title:
libunwind causes crashes on arm64
Status in libunwind package in Ubuntu:
Fix Released
Status in libunwind source package in Bionic:
In Progress
Status in libunwind source package in Focal:
In Progress
Bug description:
There is a bug in libunwind in both 18.04 and 20.04 on arm64 where
when linked with libunwind instead of catching an exception, the
program crashes. This was first seen on mcrouter, but attached is a
small reproducer where `main_unwind` will crash. The libunwind
shipping with 22.04 doesn't appear to have this problem, nor do
unmodified upstream versions (including the 1.2.1 which is the 18.04
and 20.04 version).
Attached is a small reproducer that demonstrates the problem.
Ubuntu 22.04:
```
$ ./main
int throws lib
int caught main
$ ./main_unwind
int throws lib
int caught main
```
Ubuntu 20.04:
```
$ ./main
int throws lib
int caught main
$ ./main_unwind
terminate called after throwing an instance of 'int'
terminate called recursively
Aborted (core dumped)
```
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libunwind/+bug/1999104/+subscriptions
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