Non-reproducible failure in RestartEventLogging test in `threaded1` way.
Summary
Running validate by hand the test typically succeeds, but on one run I got:
...
--- tests/rts/RestartEventLogging.run/RestartEventLogging.stdout.normalised 2021-04-20 21:29:06.924934000 -0400
+++ tests/rts/RestartEventLogging.run/RestartEventLogging.run.stdout.normalised 2021-04-20 21:29:06.925062000 -0400
@@ -8,6 +8,11 @@
stop
init
Event log started with EVENT_HEADER_BEGIN
+ERROR: event does not start with EVENT_HEADER_BEGIN
+0x0 != 0x68
+0x12 != 0x64
+0x0 != 0x72
+0x0 != 0x62
stop
init
Event log started with EVENT_HEADER_BEGIN
...
tests/rts/RestartEventLogging.run RestartEventLogging [bad stdout] (threaded1)The expected value is:
includes/rts/EventLogFormat.h:#define EVENT_HEADER_BEGIN 0x68647262 /* 'h' 'd' 'r' 'b' */but we got '\0\x12\0\0'.
Steps to reproduce
Not easily reproducible, could even be a hardware glitch, though that seems unlikely...
Expected behavior
The test should ideally pass consistently
Environment
- GHC version used: commit 4cfb6b89 (HEAD -> freebsd-tlsgd, v/freebsd-tlsgd) of MR !5561 (closed). The merge-base with head is: commit 0619fb0f (origin/master, origin/HEAD, master)
Optional:
- Operating System: FreeBSD 12.2
- System Architecture: X86_64