Bash Failed to run: /usr/bin/bash: Exit 126. Failed to run '/usr/bin/bash': Exec format error

[HerbM]

Cannot start shell

Console appears with following message displayed (almost unreadable due to colors):

• How to troubleshoot? *

/usr/bin/bash: Exit 126.
Failed to run '/usr/bin/bash': Exec format error

Actions prior:

1. Updated MSys2 using pacman last night
2. Ran script from MSys2 "package list" page used to find package list.

Result:

• Console closed and now won't start fully
• Shortcut popup (mintty.exe) displays with shell choice
• None of Bash MSys2, Mingw-w64 32 bit, or Mingw-w64 bit from shortcut work.
• Running mintty.exe from it's directory (using PowerShell) gives same results, popup but shells fail with same error as above.

• Running on Windows 7: Microsoft Windows [Version 6.1.7601] *
• Version from mintty.exe * "product" and "file" of executable, and all *.exe and *.dll in the msys64\usr\bin directory where it lives:

Product File    FullName
------- ----    --------
2.9.3   2.9.3.0 C:\Build\msys64\usr\bin\mintty.exe 

Product  File     FullName
-------  ----     --------
2.11.1   2.11.1   C:\Build\msys64\usr\bin\msys-2.0.dll
1.0.2p   1.0.2p   C:\Build\msys64\usr\bin\msys-crypto-1.0.0.dll
1.15     1.15     C:\Build\msys64\usr\bin\msys-iconv-2.dll
0.19.8.1 0.19.8.1 C:\Build\msys64\usr\bin\msys-intl-8.dll
5.2.4    5.2.4    C:\Build\msys64\usr\bin\msys-lzma-5.dll
1.0.2p   1.0.2p   C:\Build\msys64\usr\bin\msys-ssl-1.0.0.dll
0.19.8.1 0.19.8.1 C:\Build\msys64\usr\bin\envsubst.exe
0.19.8.1 0.19.8.1 C:\Build\msys64\usr\bin\gettext.exe
1.15     1.15     C:\Build\msys64\usr\bin\iconv.exe
5.2.4    5.2.4    C:\Build\msys64\usr\bin\lzcat.exe
5.2.4    5.2.4    C:\Build\msys64\usr\bin\lzma.exe
5.2.4    5.2.4    C:\Build\msys64\usr\bin\lzmadec.exe
5.2.4    5.2.4    C:\Build\msys64\usr\bin\lzmainfo.exe
2.9.3    2.9.3.0  C:\Build\msys64\usr\bin\mintty.exe
0.19.8.1 0.19.8.1 C:\Build\msys64\usr\bin\ngettext.exe

FYI: Doesn't seem to be anything named bash*.exe or bash*.dll in the msys64 tree.

sh.exe and ash.exe seem to run but I don't know if run manually from the bin directory.

Running msys64\msys2_shell.cmd also fails with same error.

[andrew-grechkin]

As just an idea for your troubleshooting,
I had similar issue (as i remember) when I had something wrong in my windows environment variables (something like '*' symbol in one of env var). Check your environment for user and for system, or maybe even try creating fresh clean user and start msys there.

[cdqncn]

仅作为您进行故障排除的一个主意，
当我在Windows环境变量中有问题（例如env var中的“ *”符号）时，我遇到了类似的问题（我记得）。检查用户和系统的环境，或者甚至尝试创建新的干净用户并在那里启动msys。

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