gnome-shell crashes due to segmentation fault due to setenv after starting threads

Note: I have no indication that this issue only affects the test suite.

Nis 09 20:58:22 amnesia gnome-shell[8965]: Using Wayland display name 'wayland-0'
Nis 09 20:58:22 amnesia kernel: traps: [pango] FcInit[8999] general protection fault ip:7d28ccc6514d sp:7d28a17ee5d0 error:0 in libc.so.6[7d28ccc4c000+155000]
Nis 09 20:58:22 amnesia systemd[6026]: org.gnome.Shell@wayland.service: Main process exited, code=killed, status=11/SEGV
Nis 09 20:58:22 amnesia systemd[6026]: org.gnome.Shell@wayland.service: Failed with result 'signal'.
Nis 09 20:58:22 amnesia systemd[6026]: Failed to start org.gnome.Shell@wayland.service - GNOME Shell on Wayland.

Failing test runs:

• https://jenkins.tails.boum.org/job/test_Tails_ISO_20328-fix-tps-frontend-error-message/1//cucumber-html-reports/report-feature_20_1315884850.html (screenshot, video, journal)