As part of the https://reproducible-builds.org/ effort, Debian packages are rebuilt in a environment where things are faked to test reproducibility. LuaSandbox's timer test fails when this happens.
tests/timer.log
---- EXPECTED OUTPUT Lua usage counted: yes (0.1s of %fs) PHP usage counted: yes (0.2s of %fs) Paused PHP usage counted: no (0.0s of %fs) Unpause works: yes (0.2s of %fs) Auto-unpause works: yes (0.1s of %fs) Reset limit unpauses: no (0.0s of %fs) Pause overrun prevented: yes (0.1s of %fs) PHP to Lua counted: yes (0.1s of %fs) PHP to paused-PHP counted: yes (0.2s of %fs) PHP to paused-PHP to paused-PHP counted: yes (0.2s of %fs) paused-PHP to Lua counted: yes (0.1s of %fs) paused-PHP to PHP counted: yes (0.2s of %fs) paused-PHP to paused-PHP counted: no (0.0s of %fs) paused-PHP to paused-PHP to paused-PHP counted: no (0.0s of %fs) paused-PHP to PHP to paused-PHP counted: yes (0.2s of %fs) ---- ACTUAL OUTPUT Lua usage counted: yes (0.1s of 0.1s) PHP usage counted: yes (0.2s of 0.2s) Paused PHP usage counted: Invalid clock_id for clock_gettime: -32962 ---- FAILED
On Debian Unstable, I reproduced this by installing the reprotest faketime packages (you might want to skip installing recommends since it pulls in a ton of stuff via diffoscope), and then ran reprotest 'make test' 'logs' in the luasandbox directory (after running phpize/configure).
Searching for the error message lead me to https://github.com/wolfcw/libfaketime/issues/127 but it wasn't obvious to me if this is an issue in libfaketime since it still doesn't appear to work.