Configuration Information [Automatically generated, do not change]: Machine: x86_64 OS: linux-gnu Compiler: gcc Compilation CFLAGS: -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection uname output: Linux lyra 5.19.14-200.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Oct 5 21:31:17 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux Machine Type: x86_64-redhat-linux-gnu
Bash Version: 5.2 Patch Level: 2 Release Status: release Description: Bash segfaults when using extglob on an empty var. Regression in 5.2.2 compared to 5.1.16 #0 __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:74 #1 0x000055cbe3eb4cd5 in pat_subst (string=string@entry=0x55cbe62cf690 "", pat=0x55cbe62cf821 "*([.])", rep=rep@entry=0x0, mflags=mflags@entry=65) at /usr/src/debug/bash-5.2.2-1.fc36.x86_64/subst.c:8960 #2 0x000055cbe3eb5737 in parameter_brace_patsub (varname=varname@entry=0x55cbe6296780 "foo", value=value@entry=0x55cbe62959b0 "", estatep=estatep@entry=0x7ffeada25340, patsub=<optimized out>, patsub@entry=0x55cbe62cf560 "#*([.])", quoted=quoted@entry=0, pflags=pflags@entry=8, flags=0) at /usr/src/debug/bash-5.2.2-1.fc36.x86_64/subst.c:9216 #3 0x000055cbe3eb6ffa in parameter_brace_expand (string=string@entry=0x55cbe6295c70 "${foo/#*([.])}", indexp=indexp@entry=0x7ffeada253f4, quoted=quoted@entry=0, pflags=pflags@entry=8, quoted_dollar_atp=quoted_dollar_atp@entry=0x7ffeada254d8, contains_dollar_at=contains_dollar_at@entry=0x7ffeada254d0) at /usr/src/debug/bash-5.2.2-1.fc36.x86_64/subst.c:9960 #4 0x000055cbe3eb92dd in param_expand (string=string@entry=0x55cbe6295c70 "${foo/#*([.])}", sindex=sindex@entry=0x7ffeada254dc, quoted=quoted@entry=0, expanded_something=expanded_something@entry=0x0, contains_dollar_at=contains_dollar_at@entry=0x7ffeada254d0, quoted_dollar_at_p=quoted_dollar_at_p@entry=0x7ffeada254d8, had_quoted_null_p=0x7ffeada254d4, pflags=8) at /usr/src/debug/bash-5.2.2-1.fc36.x86_64/subst.c:10522 Repeat-By: shopt -s extglob foo= foo=${foo/#*([.])} || echo sad # parens required to reproduce, but unnecessary otherwise.