Debian x64 builds failing

[richardlau]

All builds on test-digitalocean-debian11-x64-1 and test-rackspace-debian11-x64-1 are failing.

The build logs show Failed to exec spawn helper errors, e.g. https://ci.nodejs.org/job/node-test-commit-linux/nodes=debian11-x64/61338/console

10:00:27  > git rev-parse --resolve-git-dir /home/iojs/build/workspace/node/.git # timeout=10
10:00:27 ERROR: Workspace has a .git repository, but it appears to be corrupt.
10:00:27 hudson.plugins.git.GitException: Error performing git command: git rev-parse --resolve-git-dir /home/iojs/build/workspace/node/.git
10:00:27 	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2862)
...
10:00:27 Caused by: java.io.IOException: Cannot run program "git" (in directory "/home/iojs/build/workspace/node"): error=0, Failed to exec spawn helper: pid: 2835118, exit value: 1
10:00:27 	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1143)
...
10:00:27 Caused by: java.io.IOException: error=0, Failed to exec spawn helper: pid: 2835118, exit value: 1
10:00:27 	at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
...

https://ci.nodejs.org/job/node-test-node-addon-api-new/nodes=debian11-x64/9476/console

[debian11-x64] $ /bin/bash /tmp/jenkins4721305701979205576.sh
FATAL: command execution failed
java.io.IOException: error=0, Failed to exec spawn helper: pid: 1613199, exit value: 1
	at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
...
Caused: java.io.IOException: Cannot run program "/bin/bash" (in directory "/home/iojs/build/workspace/node-test-node-addon-api-new/nodes/debian11-x64"): error=0, Failed to exec spawn helper: pid: 1613199, exit value: 1
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1143)
...