Revision 1881735

Merge r1880602, r1881396 from trunk: [under CTR for Travis changes]

Fail for more abort() errors in error_log.
Fail if a core dump is produced, and dump the backtrace if so.
(e.g. during parent or child process shutdown, core dumps will
not show up as test case failures so would not otherwise be caught)

Catch assert() failures.