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bug#52461: spontaneous crash with portable dumper

From: YAMAMOTO Mitsuharu
Subject: bug#52461: spontaneous crash with portable dumper
Date: Mon, 13 Dec 2021 10:44:04 +0900
User-agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (Gojō) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.2 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) 
On Mon, 13 Dec 2021 10:38:28 +0900,
YAMAMOTO Mitsuharu wrote:
> 
> Because cs_i >= charset_table_used, charset_table[cs_i] (i.e., *cs)
> contains uninitialized contents.  So writing to the area that
> cs->code_space_mask points to can cause crash or memory corruption.

Sorry, cs->code_space_mask was not the destination address but the
source address.  So it does not cause memory corruption, but still
crash can happen.

                                     YAMAMOTO Mitsuharu
                                mituharu@math.s.chiba-u.ac.jp
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