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From: Eli Zaretskii <eliz@gnu.org>
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Subject: bug#16901: 24.3.50; emacs_backtrace.txt
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> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Fri, 28 Feb 2014 11:48:48 +0100
> Cc: Dmitry Antipov <antipov@dev.rtsoft.ru>, Drew Adams <drew.adams@oracle.com>, 16901@debbugs.gnu.org
> 
> >> compact_small_strings at alloc.c:1960
> >> sweep_strings at alloc.c:1890
> >> gc_sweep at alloc.c:6333
> >> Fgarbage_collect at alloc.c:5572
> >> maybe_gc at lisp.h:4518
> 
> What it is quite puzzling is that Drew is basically using the same
> builds than I do (in quite different ways, of course), and yet I've
> got very few gc crashes, perhaps a couple in the last month, while he
> seems to get them a lot.

Because it's some usage pattern that triggers this, not the way you
build Emacs.