Hi,

https://bugzilla.redhat.com/show_bug.cgi?id=1099405

Program received signal SIGABRT, Aborted.
[...]
(gdb) gcore foobar
Couldn't get registers: No such process.
(gdb) info threads 
[...]
(gdb) gcore foobar
Saved corefile foobar
(gdb) 

gcore tries to access the exited thread:
[Thread 0x7ffff7fce700 (LWP 6895) exited]
ptrace(PTRACE_GETREGS, 6895, 0, 0x7fff18167dd0) = -1 ESRCH (No such process)

Without the TRY_CATCH protection testsuite FAILs for:
	FAIL: gdb.threads/gcore-thread.exp: save a zeroed-threads corefile
	FAIL: gdb.threads/gcore-thread.exp: core0file: re-load generated corefile (bad file format)
Maybe the TRY_CATCH could be more inside update_thread_list().

Similar update_thread_list() call is IMO missing in procfs_make_note_section()
but I do not have where to verify that change.


Jan