On Sat, 20 Jun 2015, Douglas Carmichael wrote:

Jon:

I’ve also seen the same crash/coredump case in TermPrimBufferDelete() within 
TermPrimBuffer.c:

~~~~~~

#0  0x00001f5a61dcb90a in kill () at <stdin>:2
#1  0x00001f5a61e050b9 in abort () at /usr/src/lib/libc/stdlib/abort.c:53
#2  0x00001f5a61dda1d8 in memcpy (dst0=0xfb862, src0=0x6, length=0)

^^^ Well, all of those args to memcpy look pretty wrong, no wonder it
cores.  Is this with your patch applied?

Something is going pretty wrong here, though the damage has already
been done by the time this code is reached.

#3  0x00001f59be3404ee in _DtTermPrimBufferDelete (tb=0x1f5a3fba0600, 
row=Variable
"row" is not available.
)
   at TermPrimBuffer.c:1233


This code actually appears to be:

_DtTermDeleteEnhancement() defined in TermBuffer.c, line 688.  The
memcpy is being called there (at the end), if that helps to debug.
This also looks like a candidtate to call memmove rather than memcpy,
(as it appears to copy an overlapping buffer) but those args are still
pretty wrong.

[...]


~~~~

Does this give you any clues?

—Douglas


Not to the original cause, no -- though it's pretty clear why memcpy
is coring :)  Wonder what is so different from previous version of
OpenBSD...  I hadn't heard of any dtterm problems on BSD before.


--
Jon Trulson

"If we can hit that bull's-eye, the rest of the dominoes will fall
like a house of cards... Checkmate."
                                        -- Zapp Brannigan
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