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Re: 64-bit emacs crashes a lot


On 8/3/2013 3:05 PM, Ryan Johnson wrote:
On 02/08/2013 8:07 AM, Ryan Johnson wrote:
On 02/08/2013 7:04 AM, Ken Brown wrote:
On 8/2/2013 4:02 AM, Corinna Vinschen wrote:
On Aug  1 22:46, Ryan Johnson wrote:
Here's a new one... I started a compilation, but before it actually
invoked the command it started pegging the CPU. After ^G^G^G, it
crashed with the following:
Auto-save? (y or n) y
      0 [main] emacs 5076 C:\cygwin64\bin\emacs-nox.exe: *** fatal
error - Internal error: TP_NUM_W_BUFS too small 2268032 >= 10.

That looks like a memory overwrite.  2268032 is 0x229b80, which looks
suspiciously like a stack address.  And the overwritten value is on the
stack, too, well within the cygwin TLS area.  If *this* value gets
overwritten, the TLS is probbaly totally hosed at this point. There's
just no way to infer the culprit from this limited info.

Could this be BLODA?  Ryan, I noticed that you wrote in a different
thread, "I recently migrated to 64-bit cygwin...and so far have not
had to disable Windows Defender; the latter was a recurring source of
trouble for my previous 32-bit cygwin install on Win7/64."
This would be a whole new level of nasty from a BLODA... I thought
they only interfered with fork()?

However, this *is* Windows Defender we're talking about... service
disabled and all cygwin processes restarted. I'll let you know in a
day or so if the crashes go away.
Rats. I just had another crash, the "Fatal error 6" variety. Windows
Defender has not turned itself back on (it's been known to do that), and
a scan of the BLODA list didn't match anything else on my system.

So I don't think it's BLODA...

Ideas?

Not really, other than the obvious: (a) Find a reproducible way of making emacs-nox crash. (b) Catch the crash in gdb by setting a suitable break point.

Ken

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