Re: [Lilypond-auto] Issue 2078 in lilypond: always-changing regtest: graphviz.log

[lilypond]

Comment #6 on issue 2078 by address@hidden: always-changing regtest:  
graphviz.log
http://code.google.com/p/lilypond/issues/detail?id=2078

Actually, no such luck: the graphviz changes apparently happen in  
connection with changes in input/regression.  Since the lybook-testdb  
hashes are derived from file contents and the test runs are split according  
to alphabet IIRC, any change in tests is likely to result in different  
tests being run before the graphviz test.

So either some test causes permanent changes in data structures affecting  
the graphviz test (which would be a bug), or the graphviz test itself  
depends on the memory layout of its data (one conceivable cause would be  
use of hash-fold or similar routines depending on the traversal order of an  
eq-based hashtable).