Re: Build hangs in lisp/gnus.

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sat, 4 Apr 2015 15:35:30 +0000
> Cc: emacs-devel@gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> I restarted the boot strap with
> 
>     CFLAGS="-g3 -O0" make bootstrap
> 
> (I don't normally have debugging info compiled), leaving out the -j5 flag
> for simplicity.  The make process then slogs away, then it hangs trying
> to byte-compile allout.el.
> 
> I have attached gdb from a running Emacs and typed bt.  The stack is 197
> function calls deep; the top few lines look like this:
> 
> #0  0x000000000054f45f in builtin_lisp_symbol (index=0) at lisp.h:1075
> #1  0x000000000054f5bb in CAR (c=0) at lisp.h:1213
> #2  0x00000000005fcfc2 in Fassq (key=1013312, list=0) at fns.c:1449
> #3  0x00000000005f2013 in Fmacroexpand (form=14866355, environment=0) at eval.c:1023
> #4  0x00000000005f5e5d in Ffuncall (nargs=3, args=0x7fff0f1dc3a8) at eval.c:2721
> #5  0x000000000063b0d3 in exec_byte_code (bytestr=9955060, vector=9955093, maxdepth=42, args_template=2058, nargs=2, args=0x7fff0f1dc938) at bytecode.c:919
> #6  0x00000000005f6668 in funcall_lambda (fun=9955013, nargs=2, arg_vector=0x7fff0f1dc928) at eval.c:2885
> #7  0x00000000005f60d6 in Ffuncall (nargs=3, args=0x7fff0f1dc920) at eval.c:2767
> #8  0x000000000063b0d3 in exec_byte_code (bytestr=9955252, vector=9955285, maxdepth=114, args_template=1030, nargs=1, args=0x7fff0f1dcf50) at bytecode.c:919
> #9  0x00000000005f6668 in funcall_lambda (fun=9955205, nargs=1, arg_vector=0x7fff0f1dcf48) at eval.c:2885
> 
> I've tried xbacktrace, as suggested in etc/DEBUG, but that didn't work.
> (I think I've missed some of the necessary prerequisites in skimming over
> the file too quickly.)  I'm not very practiced at gdb.
> 
> Is there anything else I could usefully do whilst my gdb is still
> running?

Type "finish" repeatedly s long as it displays the call-stack frames,
then tell here which frame was the last you saw, before it stopped
showing frames.