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Re: SEGV in Garbage collection during build
From: |
Stefan Monnier |
Subject: |
Re: SEGV in Garbage collection during build |
Date: |
Wed, 20 Oct 2004 13:56:27 GMT |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/21.3.50 (gnu/linux) |
Please take this to gnu.emacs.bug rather than gnu.emacs.help.
You'll hopefully get more info over there.
> CC-513 cc: WARNING File = frame.c, Line = 2118
> A value of type "unsigned char *" cannot be assigned to an entity of type
> "char *".
> color_name = XSTRING (value)->data;
> But I don't believe these are significant.
I don't know about the "indicated argument is incompatible with the
corresponding formal parameter", but the char-vs-unsigned-char should be
harmless (tho pesky abnd surprisingly difficult to fix).
> The problem occurs in the build when Emacs tries to load lisp. This problem
> is reproducable by running
> ./temacs -batch
> There is a failure in mark_object after it is recutsivly called about for
> the 31,000th time. It makes stack tracing a bit difficult.
How far through the dump process is it when it crashes?
Is that the first garbage collection?
> So any suggestions for getting to the bottom of this SEGV?
I suggest you take a look at the files in emacs/src/m/* and emacs/src/s/*.
If you can find there a machine or OS that you expect to be somewhat similar
to the X1, it might contain useful hints. See also emacs/etc/PROBLEMS.
Also, could it be that the SEGV is just a stack overflow (i.e. the stack
limit is too low)? Seems unlikely on a Cray, tho :-)
Your binary dos not seem to contain debugging info (at least your backtrae
shows no info about arguments, which is a pretty good sign that the debug
info is missing), so you should rebuild with debug info.
Stefan