This is a result that has been appearing for over a year. I ahd been hoping it would go away the same way it appeared - surprise surprise! But this seems to need some help - so I need your help to get a bit deeper. I ran a single configuration - which always fails - SMOKE results via:http://perl5.test-smoke.org/report/40597 Note: when DEBUGGING is not active, the test succeeds! Here are the results when run locally (after SMOKE finished) michael@lp03:[/data/smoker/perl-michael/t]./perl -I../lib re/pat_thr.t ... ok 686 - \98 works with 98 buffers 'aa'=~/...\98/ ok 687 - \98 works with 98 buffers 'aba'=~/...b\98/ Segmentation fault(coredump) michael@lp03:[/data/smoker/perl-michael/t]./perl -I../lib TEST re/pat_thr.t t/re/pat_thr ... FAILED--expected 776 tests, saw 687 Failed 1 test out of 1, 0.00% okay. re/pat_thr.t ### Since not all tests were successful, you may want to run some of ... So I guess test 688 is core-dumping. How to dig deeper? MichaelThread Next