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Re: SIGSEGV -- redisplay bug


From: Richard Stallman
Subject: Re: SIGSEGV -- redisplay bug
Date: Mon, 17 Feb 2003 02:20:27 -0500

    I know nothing of aliasing...  so i don't know what you question is
    about.

It is inefficient to choose me for this job, since any C programmer
can explain it.  Please ask a C programmer.

    > Would  row->glyphs[area][i].charpos  ever have aliased with area?

    (gdb) i ad area
    Symbol "area" is a variable in register edx.

Since area is in a register, we know they cannot alias.

At this point, I am almost convinced it has to be a hardware fault (or
maybe a kernel bug that affects process switching).  However, I think
someone would have to study the assembler language before really
believing this conclusion, because there is also the chance it could
be a compiler bug.




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