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Hi, I've changed the title of the issue to "sbrk() saUnixSpurMemory patch" as the error that is raised : mmap() initialAlloc failed made me think at first that this is an mmap§) issue but as explained before it is rather an interaction between sbrk() and the alignment of the return value of that system call (or library function in Linux) and the loop sqAllocateMemorySegmentOfSizeAboveAllocatedSizeInto§) which is a specific purpose where it is not certain that the return value of sbrk() is correctly aligned for that purpose.
Also by the way I submitted a PR (pull request) as user "dcstes" (dcstes is a another github account of user "cstes") which hopefully can be considered for fixing this on all UNIX and Linux platforms, which may be helpful for example for BSD variants of UNIX.
The issue has become clearer to me and probably this change or PR will not break anything and only increase portability of the Cog VM.
Regards
David Stes
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