https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119778
Bug ID: 119778
Summary: gcc gimple crashes on some setjmp/longjmp code
Product: gcc
Version: 13.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: izaberina at gmail dot com
Target Milestone: ---
Created attachment 61092
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61092&action=edit
the horrible code in question
so i wrote some horrible code: https://godbolt.org/z/v9fe1Mo98
as shown on godbolt:
- it behaves as intended with asan
- it doesn't print anything without asan
- it reliably crashes gcc with -Wall -O2 starting from gcc 13.3.0 up to at
least 14.2.0
```
during GIMPLE pass: uninit
<source>: In member function 'void tac::f()':
<source>:10:10: internal compiler error: Segmentation fault
10 | void f() {
| ^
```
crashing seems suboptimal, although one could argue that this code wasn't ever
supposed to work, and that crashing on it is a better result than building it
one could also argue that asan shouldn't change its behaviour this way
