[Bug 50491] New: Detecting whether garbled lines are new

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50491

Bug ID: 50491
           Summary: Detecting whether garbled lines are new
           Product: Wine-Testbot
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Sometimes a failure line is garbled because of race conditions or a missing
'\n'. This typically looks something like this:

advpack.c:689: WTBS Garble 2advpack.c:691: WTBS Garble 3advpack.c:692: Test
failed: WTBS A test failure

The TestBot still detects these failures because it knows which test unit is
running at that point in the report and thus looks for something like
'advpack.c:\d+: Test failed: ...'.

But when it tries to detect whether this is a new error line it cannot compare
the whole line with past instances as the garbage part may change or not be
present in WineTest runs (particularly if it contains line numbers). That
suggests it should extract just the current failure string, that is:

advpack.c:692: Test failed: WTBS A test failure

This should maybe also be the string stored in the .errors file.