Unable to rund `brew doctor` or `brew list --cask` due to Cask error

Question

I just installed a new Cask and afterwards, I ran brew doctor, which returns Error: Cask 'java' is unreadable: undefined method undent' for #String:0x00007f8d77a0ae40`.

Java doesn't appear under brew list, so I tried brew list --cask, but got the same error message again. Running /usr/libexec/java_home -V returns:

Matching Java Virtual Machines (1):
    1.8.0_121, x86_64:  "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home

/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home

I'm not sure what the issue is. Do I need to re-install Java?

Answer 1

I cleared the error by deleting the update .pkg file in /usr/local/Caskroom/java/1.8.0_121-b13,e9e7ea248e2c4826b92b3f075a80e441/