[Bug sanitizer/80498] Simple program with address sanitizer and regex hangs

[gcc at zutt dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80498

--- Comment #7 from jonne <gcc at zutt dot org> ---
I compiled with -S and looked at m.s.
I'm not sure, but my main function could be this (I found this code in m.s, by
searching for 'main', lines 4058 - 4095):

lC6:
    .ascii "foo test 123\0"
    .space 51
    .text
    .globl _main
_main:
LASANPC4457:
LFB4457:
    .loc 20 19 0
    pushq   %rbp
LCFI156:
    movq    %rsp, %rbp
LCFI157:
    pushq   %rbx
    subq    $72, %rsp
LCFI158:
    movl    %edi, -68(%rbp)
    movq    %rsi, -80(%rbp)
LEHB2:
    .loc 20 20 0
    call    __Z4testv
LEHE2:
    .loc 20 21 0
    leaq    -49(%rbp), %rax
    movq    %rax, %rdi
    call    __ZNSaIcEC1Ev
    leaq    -49(%rbp), %rdx
    leaq    -48(%rbp), %rax
    leaq    lC6(%rip), %rsi
    movq    %rax, %rdi
LEHB3:
    call    __ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1EPKcRKS3_
LEHE3:
    .loc 20 21 0 is_stmt 0
    leaq    -48(%rbp), %rax
    movq    %rax, %rdi
LEHB4:
    call    __Z1aRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE