check_exit_status.patch: test-sig was reproducibly segment faulting but this was not necessarily being captured. This patch causes the exit status of the debugger to be explicitly checked ths making the integration tetsing more reproducible.
test-sig.patch: Turn off those commands that case the SEGV and adjust sig-43.right. We do NOT expect this patch to be adopted but rather for the SEGV to be investigated.
SIGXFSZ.patch: We got the SIGXFSZ in some envionments. Here rather than just filtering out the signal handler from the test results we set a handler to make it reproducible.
SIGSYS.patch: We got this signal on the kfreebsd platform so we just filtered it out.
I've applied SIGSYS.patch and SIGXFSZ.patch in commit a784236. For the remaining open problems, please create a separate ticket with the check_exit_status.patch
If there is an unexpected SEGV, there is a chance this is (also?) a bash bug.