Certain syntaxes in ruby cause extraction errors

[wonda-tea-coffee]

The following ruby code causes an extraction error when parsed.

def foo(bar: nil) = raise NotImplementedError

The error message is as follows.

Error: Extraction failed in [filepath] with error A parse error occurred. Check the syntax of the file. If the file is invalid, correct the error or exclude the file from analysis.

This code is correct ruby syntax.
This problem was reproduced with CodeQL version 2.4.5.

[aibaars]

You're absolutely right, thanks for reporting. This is a problem with the underlying ruby parser that CodeQL uses. I raised an issue on tree-sitter-ruby: tree-sitter/tree-sitter-ruby#242

The parse error is unlikely to cause problems with the CodeQL analysis because the parser should be able to recover and analyze the rest of the code normally. As a workaround you could use a parenthesized argument list in the one-line method def:

def foo(bar: nil) = raise(NotImplementedError)

[wonda-tea-coffee]

Thank you very much!
I appreciate your prompt reply.