[Bug c++/66805] Crash in gcov_exit when combining --coverage, C++, #pragma pack

[jengelh at inai dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66805

--- Comment #1 from Jan Engelhardt <jengelh at inai dot de> ---
(gdb) r
Starting program: t 

Program received signal SIGSEGV, Segmentation fault.
compute_summary (max_length=<synthetic pointer>, this_prg=0x7fffffff9540,
list=0x7ffff7dda180)
    at ../../../libgcc/libgcov-driver.c:307
307     ../../../libgcc/libgcov-driver.c: No such file or directory.
(gdb) bt
#0  compute_summary (max_length=<synthetic pointer>, this_prg=0x7fffffff9540,
list=0x7ffff7dda180)
    at ../../../libgcc/libgcov-driver.c:307
#1  gcov_do_dump (list=0x7ffff7dda180, run_counted=0) at
../../../libgcc/libgcov-driver.c:837
#2  0x00007ffff7bd9112 in __gcov_dump_one (root=0x7ffff7ddb280 <__gcov_root>)
at ../../../libgcc/libgcov-driver.c:858
#3  gcov_exit () at ../../../libgcc/libgcov-driver.c:874
#4  0x00007ffff6fccf7f in __cxa_finalize (d=0x7ffff7dda120) at
cxa_finalize.c:56
#5  0x00007ffff7bd7173 in __do_global_dtors_aux () from ./pack.so
#6  0x00007fffffffde00 in ?? ()
#7  0x00007ffff7deaf3a in _dl_fini () at dl-fini.c:252
Backtrace stopped: frame did not save the PC