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Regression: EXIT traps always run in global context


From: Ivan Shapovalov
Subject: Regression: EXIT traps always run in global context
Date: Thu, 28 Nov 2024 08:23:48 +0400
User-agent: Evolution 3.54.2

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -march=x86-64 -mtune=generic -O2 -pipe -fno-plt 
-fexceptions         -Wp,-D_FORTIFY_SOURCE=3 -Wformat -Werror=format-security   
      -fstack-clash-protection -fcf-protection         -fno-omit-frame-pointer 
-mno-omit-leaf-frame-pointer -g 
-ffile-prefix-map=/build/bash/src=/usr/src/debug/bash -flto=auto 
-DDEFAULT_PATH_VALUE='/usr/local/sbin:/usr/local/bin:/usr/bin' 
-DSTANDARD_UTILS_PATH='/usr/bin' -DSYS_BASHRC='/etc/bash.bashrc' 
-DSYS_BASH_LOGOUT='/etc/bash.bash_logout' -DNON_INTERACTIVE_LOGIN_SHELLS
uname output: Linux able 6.11.10-arch0pf5-1 #1 SMP PREEMPT_DYNAMIC Thu, 01 Jan 
1970 00:00:00 +0000 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 5.2
Patch Level: 37
Release Status: release

Description:
        Regression: When an EXIT trap runs, it runs in global context, i.e.
        does not see the locals defined in the function that was executing
        at the time of the exit.

Repeat-By:
        See the attached script.

        $ INNER_FAIL_EXIT=1 ./test.sh # or interrupt with ^C during "inner 
sleep 2")
        (observe 5 `inner-*`, `outer-*` and `main-*` messages printed upon exit)

        $ INNER_FAIL_2=1 ./test.sh
        (observe just one `main-*` message printed upon exit)

        Expected behavior in both cases is the same. It was the same until a
        recent bash release.

Thanks,
-- 
Ivan Shapovalov / intelfx /

Attachment: test.sh
Description: application/shellscript

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