My Linux workstation is configured to write properly named core dumps to a dedicated directory.
Building both: current git version and latest release (CDE-2.2.2) provides similar core dump files:
-r--r--r-- 1 portage portage 425984 сен 13 09:59 core_30953.exe-6.31748
-rw------- 1 portage portage 425984 сен 13 10:51 core_5624.exe-6.6418
'core_' is standard prefix.
'30953.exe' || '5624.exe' are process' names.
And 6 is signal killed. I.e. SIGABRT.
Compressed core file is attached.
I can't do much with those... Please file a report when you find out what is coring (maybe try gdb and get a backtrace?), and where.