Couldn't reserve space for cygwin's heap
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After pushing to Stash results in the following intermittent error on Git clients:
H:\> git push Counting objects: 10, done. Delta compression using up to 4 threads. Compressing objects: 100% (7/7), done. Writing objects: 100% (10/10), 1.31 KiB | 0 bytes/s, done. Total 10 (delta 4), reused 0 (delta 0) remote: 0 [main] us 0 init_cheap: VirtualAlloc pointer is null, Win32 error 487 remote: AllocationBase 0x0, BaseAddress 0x68570000, RegionSize 0x300000, State 0x10000 remote: D:\Sysdata\Git\bin\env.exe: *** Couldn't reserve space for cygwin's heap, Win32 error 0 To ssh://firstname.lastname@example.org/com/composer-bt-app.git ! [remote rejected] project/composer_nov_2015/dev -> project/composer_nov_2015/dev (pre-receive hook declined) error: failed to push some refs to 'ssh://email@example.com/com/composer-bt-app.git'
The full explanation for such issue can be found on this Stackoverflow answer.
It's Cygwin code failing to allocate a ~5 MB large chunk of memory for its heap at this fixed address 0x68570000, while only a hole ~2.5 MB large was apparently available there. The relevant code can be seen in msysgit source.
Both current Cygwin and the new version of MSYS - MSYS2 - already have different logic in place, which is hopefully more robust. It's only old versions of Git for Windows which have been still built using the old broken MSYS system.
- Install Git for Windows 2 - it is built with the new, properly maintained MSYS2 and also has many new features, plenty of bug fixes and so on. There is also a 64-bit version available which would lower the chance of address space clashes considerably even if this problem was not fixed.
- On our Supported Platforms we outline the Git versions that should work well with your environment.