Cygwin/21.5-b32 bug?

I've recently been having my XEmacs (built from source under Cygwin, 21.5-b32) go into a full-cpu un-interruptable loop. Running under gdb shows this after the lockup: [main] xemacs-21.5-b32 13400 sig_send: wait for sig_complete event failed, signal -13, rc 258, Win32 error 0 gdb is also stuck at this point procexp shows gdb stuck waiting at ntdll.dll!NtWaitForDebugEvent+0xa XEmacs is splitting the cpu between two threads: wow64cpu.dll!CpuSimulate+0x16e ntdll.dll!NtQueryInformationThread+0x12 **cygwin1.dll!lfind+0x44ab** cygwin1.dll!getenv+0x48d2 cygwin1.dll!sigfillset+0x2df7 cygwin1.dll!setprogname+0x1cc5 cygwin1.dll!setprogname+0x224f cygwin1.dll!setprogname+0x2df1 and wow64cpu.dll!TurboDispatchJumpAddressEnd+0x6c0 wow64cpu.dll!TurboDispatchJumpAddressEnd+0x56b wow64.dll!Wow64SystemServiceEx+0x1ce wow64.dll!Wow64LdrpInitialize+0x429 ntdll.dll!RtlIsDosDeviceName_U+0x24c87 ntdll.dll!LdrInitializeThunk+0xe ntdll.dll!ZwDelayExecution+0x15 **cygwin1.dll!lfind+0x44d9** xemacs-21.5-b32.exe+0x201cf6 xemacs-21.5-b32.exe+0x7c6f9 xemacs-21.5-b32.exe+0x1e96ba xemacs-21.5-b32.exe+0x2302de xemacs-21.5-b32.exe+0x230319 WINMM.DLL!DriverCallback+0x4e WINMM.DLL!timeEndPeriod+0x54a WINMM.DLL!timeEndPeriod+0x449 cygwin1.dll!setprogname+0x319d The ** lines show the up (from the bottom) through which the stack is stable, the loop is somewhere above that. Any ideas? Suggestions as to how to debug this? Oh yes, the xemacs itself is in one of those semantic idle-timeout analysis phases: the message line says LALR/auth_ldap.inc: [####....] ... done which is some miscellanious cousin in the file-system of the PHP code whose buffer is showing at the moment. ht -- Henry S. Thompson, School of Informatics, University of Edinburgh 10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 650-4587, e-mail: ht(a)inf.ed.ac.uk URL: http://www.ltg.ed.ac.uk/~ht/ [mail from me _always_ has a .sig like this -- mail without it is forged spam] _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-beta