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Git bash Error : Could not fork child process : Resource temporarily unavailable

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動作環境

Windows

Edition : Windows 10 Enterprise
Version : 1809
OS build : 17763.1217
System : 64bit Operating system, x64 base processor

Git for windows

Git-2.26.2-64-bit.exe

TortoiseGit

TortoiseGit-2.10.0.2-64bit.msi

不具合現象

Git Bash起動時

Git for windowsインストール後にGit Bashを起動すると
Error : Could not fork child process : Resource temporarily unavailable (-1).
DLL rebasing may be required; see rebaseall / rebase --help.
というエラーが発生し起動できず
Git GUIとGit CMDは正常に起動する。
git_bash_error.png

TortoiseGitでgit clone時

下記エラーが発生。レポジトリのクローンは一応できている様子。

0 [main] sh (12996) C:\Program Files\Git\usr\bin\sh.exe: *** fatal error - cygheap base mismatch detected - 0x12C7408/0x1317408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version. The most recent version should
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution. Rebooting is also suggested if you
are unable to find another cygwin DLL.
0 [main] sh 130 dofork: child -1 - forked process 12996 died unexpectedly, retry 0, exit code 0xC0000142, errno 11
C:/Program Files/Git/mingw64/libexec/git-core\git-submodule: fork: retry: Resource temporarily unavailable
.....
.....
C:/Program Files/Git/mingw64/libexec/git-core\git-submodule: fork: Resource temporarily unavailable

git did not exit cleanly (exit code 254) (195687 ms @ 2020/05/22 10:15:15)

解決策

Windows10 Exploit protectionの「イメージのランダム化を強制する(必須ASLR)をオフに設定することで回避できる。私のPCはなぜかオンに設定されていた。なぜこの設定を切り替えればできるのかは今のところ不明。

コントロールパネルで「アプリとブラウザ-コントロール」と検索して開く
Exploit protectionの設定をクリック

exploit1.PNG

イメージのランダム化を強制する(必須ASLR)がオンになっている
exploit2.PNG

規定値を使用する(オフ)に設定して、再起動する
exploit3.PNG

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