Re: Issue 1723 in lilypond: beam fails to extend over rest, intermittently

[David Kastrup]

"address@hidden" <address@hidden> writes:

> On Nov 17, 2011, at 3:22 PM, address@hidden wrote:
>
>> 
>> Comment #10 on issue 1723 by address@hidden: beam fails to extend over
>> rest, intermittently
>> http://code.google.com/p/lilypond/issues/detail?id=1723
>> 
>> Previous comment 9 was a wrong lead, just a case of obfuscate
>> programming.  I'll likely commit some programming comments to save
>> somebody else from wracking his brain, but that's about it for that
>> last hunch.  Search goes on.
>
> Using all of the suggestions proposed so far, I'm failing to reproduce
> the error in all but the occasional regtest.
> This has uninitialized variable written all over it.  If someone can
> get me a surefire buggy file, I can likely figure this out.  The
> challenge is getting the consistently buggy file.

Another idea of mine was order-dependency for iterating through a map or
other hashing structure (in particular an eq?-hashtable or its C++
equivalent) that might involve memory addresses in its hash generation.

-- 
David Kastrup