Hi, On i686-linux, the gstreamer gst_gstsystemclock test is failing: --8<---------------cut here---------------start------------->8--- 41/108 gst_gstsystemclock FAIL 1.26s exit status 2 >>> GST_PLUGIN_SYSTEM_PATH_1_0='' CK_DEFAULT_TIMEOUT=600 GST_STATE_IGNORE_ELEMENTS='' MALLOC_PERTURB_=230 GST_PLUGIN_SCANNER_1_0=/tmp/guix-build-gstreamer-1.20.3.drv-0/build/libs/gst/helpers/gst-plugin-scanner GST_PLUGIN_LOADING_WHITELIST=gstreamer GST_REGISTRY=/tmp/guix-build-gstreamer-1.20.3.drv-0/build/tests/check/gst_gstsystemclock.registry GST_PLUGIN_PATH_1_0=/tmp/guix-build-gstreamer-1.20.3.drv-0/build /tmp/guix-build-gstreamer-1.20.3.drv-0/build/tests/check/gst_gstsystemclock ????????????????????????????????????? ? ????????????????????????????????????? stdout: Running suite(s): GstSystemClock 75%: Checks: 8, Failures: 0, Errors: 2 ../gstreamer-1.20.3/tests/check/gst/gstsystemclock.c:263:E:waiting:test_stress_cleanup_unschedule:0: (after this point) Received signal 5 (Trace/breakpoint trap) ../gstreamer-1.20.3/tests/check/gst/gstsystemclock.c:263:E:waiting:test_stress_reschedule:0: (after this point) Received signal 5 (Trace/breakpoint trap) Check suite gst_systemclock ran in 1.236s (tests failed: 2) stderr: (gst_gstsystemclock:5546): GLib-ERROR **: 22:57:16.217: creating thread 'wait': Error creating thread: Resource temporarily unavailable (gst_gstsystemclock:6027): GLib-ERROR **: 22:57:16.340: creating thread 'wait': Error creating thread: Resource temporarily unavailable ?????????????????????????????????????????????????????????????????????????????? --8<---------------cut here---------------end--------------->8--- Full log output here: https://ci.guix.gnu.org/build/1305526/log/raw I'm not able to reproduce this locally. Any idea what might be going on here? Parallelism issue? Note: we have disabled these tests on i686 for a long time, but they were recently enabled again on 'staging'. I'll re-apply that hunk to disable the test, but wanted to have an issue to link to.