[Bug 234475] multimedia/dav1d

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234475

            Bug ID: 234475
           Summary: multimedia/dav1d
           Product: Ports & Packages
           Version: Latest
          Hardware: i386
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: jbeich at FreeBSD.org
          Reporter: mi at FreeBSD.org
             Flags: maintainer-feedback?(jbeich at FreeBSD.org)
          Assignee: jbeich at FreeBSD.org

I configured the port to automatically perform self-tests after building. The
very first of the tests dies from SIGBUS:

....
===>  Staging for dav1d-0.1.0
[1/13] /opt/bin/meson --internal vcstagger ../include/version.h.in
include/version.h 0.1.0
/var/ports/multimedia/dav1d/work/dav1d-a6b903fb6d78f1515b2c50ba17ae50ead8cf5b72-a6b903fb6d78f1515b2c50ba17ae50ead8cf5b72/include
@VCS_TAG@ '(.*)' /opt/bin/git --git-dir
/var/ports/multimedia/dav1d/work/dav1d-a6b903fb6d78f1515b2c50ba17ae50ead8cf5b72-a6b903fb6d78f1515b2c50ba17ae50ead8cf5b72/.git
describe --tags --long --match '?.*.*' --always
fatal: Not a git repository:
'/var/ports/multimedia/dav1d/work/dav1d-a6b903fb6d78f1515b2c50ba17ae50ead8cf5b72-a6b903fb6d78f1515b2c50ba17ae50ead8cf5b72/.git'
[1/2] /opt/bin/meson test --no-rebuild --print-errorlogs
  1/855 dav1d / checkasm                        FAIL     0.48 s (killed by
signal 10 SIGBUS)
  2/855 dav1d:testdata-8 / 00000000             OK       0.34 s
  3/855 dav1d:testdata-8 / 00000001             OK       1.51 s
....

The other 854 tests succeed.

The stack of the test-program (checkasm), as found in the core-dump, is:

(gdb) where
#0  0x0807170e in cdef_find_dir_c ()
#1  0xdb83381c in ?? ()
#2  0x28119620 in ?? ()
#3  0x00000001 in ?? ()
#4  0x28164f85 in check_deferred_signal (curthread=0x2811a600) at
/var/src/lib/libthr/thread/thr_sig.c:324
Previous frame inner to this frame (corrupt stack?)

Dump of assembler code for function cdef_find_dir_c:
0x08071700 <cdef_find_dir_c+0>: push   %ebp
0x08071701 <cdef_find_dir_c+1>: push   %ebx
0x08071702 <cdef_find_dir_c+2>: push   %edi
0x08071703 <cdef_find_dir_c+3>: push   %esi
0x08071704 <cdef_find_dir_c+4>: sub    $0x1cc,%esp
0x0807170a <cdef_find_dir_c+10>:        lds    (bad),%edi
0x0807170b <cdef_find_dir_c+11>:        clc
0x0807170c <cdef_find_dir_c+12>:        push   %edi
0x0807170d <cdef_find_dir_c+13>:        rol    $0xfc,%ch
0x08071710 <cdef_find_dir_c+16>:        sub    %eax,0xe0(%esp)
0x08071717 <cdef_find_dir_c+23>:        lds    (bad),%edi
0x08071718 <cdef_find_dir_c+24>:        cld
0x08071719 <cdef_find_dir_c+25>:        sub    %eax,0xc0(%esp)
0x08071720 <cdef_find_dir_c+32>:        lds    (bad),%esi
0x08071721 <cdef_find_dir_c+33>:        lock push %edi
0x08071723 <cdef_find_dir_c+35>:        leave
...

Forcing the optimization to -O0 -- or simply building WITH_DEBUG -- provides a
work-around. This is a FreeBSD-11.2/i386-STABLE machine.

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