Fix a crash affecting some mp3 files

10 jobs for master in 7 minutes and 32 seconds (queued for 8 seconds)
latest
Status Job ID Name Coverage
  Linting
passed #157274
linting:bandit

00:00:12

passed #157276
linting:codespell

00:00:10

passed #157293
linting:mypy

00:00:13

passed #157288
linting:pyflakes

00:00:11

passed #157279
linting:pylint

00:00:25

 
  Test
passed #157298
tests:archlinux

00:01:06

passed #157301
tests:debian

00:01:04

failed #157303
tests:debian_with_bubblewrap

00:01:24

passed #157308
tests:fedora

00:01:00

passed #157312
tests:gentoo

00:05:59

 
Name Stage Failure
failed
tests:debian_with_bubblewrap Test
  File "/builds/jvoisin/mat2/tests/test_libmat2.py", line 70, in test_ffmpeg_injection_complete_path
self.assertTrue(p.remove_all())
AssertionError: False is not true

----------------------------------------------------------------------
Ran 119 tests in 76.386s

FAILED (failures=4)
ERROR: Job failed: exit code 1