Re: 64-bit emacs crashes a lot

[Eli Zaretskii]

> Date: Fri, 16 Aug 2013 07:37:53 -0400
> From: Ryan Johnson <address@hidden>
> CC: address@hidden
> 
> Re die as soon as possible: We're in violent agreement: I argued 
> that---if 5-byte UTF-8 is illegal---emacs should abort at the decoding 
> stage (= earlier) rather than at some later point when it discovers the 
> too-large value.

If Emacs can discover this when it decodes text, it does trigger an
error.  But sometimes the buffer is corrupted later, which I think
what happened in your case.