This sounds like a segment / Boundry issue... how far up does it repeat this action? or have you tried??? is it an even number of blocks that the error does not occur?

Chris

Hello,



when trying to fix an issue with Guitar Rig 3 on Wine (Bug 10129, "Guitar Rig 3 

crashes"), I found out something odd: The crash is affected by the size of the 

SUBHEAP structure in dlls/ntdll/heap.c. Just by adding 8 unused bytes to 

SUBHEAP, GR3 does not crash anymore. Add another 8 bytes, GR3 crashes again, yet 

another 8 bytes - no crash and so on.



The bug surfaced with this commit:



[1d063ae18d990343fc077dcbf650add797924018]

ntdll: Remove assumptions that the subheap is at the beginning of the memory 

block.



I don't think the commit is the cause of the problem. It merely changed the size 

of SUBHEAP to a problematic value.



I don't really understand the inner workings of heap.c. Does anyone have an idea 

what the cause might be, or20where to look for more information?



Cheers,

Martin



P.S. Link to the bug: http://bugs.winehq.org/show_bug.cgi?id=10129











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