PHP Warning when configuring referencedMethod

[Chi-teck]

Problem

I have the following in my psalm.xml file.

<issueHandlers>
    <UndefinedInterfaceMethod>
        <errorLevel type="suppress">
            <referencedMethod name="ask"/>
        </errorLevel>
    </UndefinedInterfaceMethod>
</issueHandlers>

When running psalm the following error shows up.

PHP Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /var/www/project/vendor/vimeo/psalm/src/Psalm/Config/FileFilter.php on line 440

After checking the corresponding code I think the idea was to suppress the warnings while validating the regexp. However, it doesn't work because the temporary error handler returns false which causes the default error handler to continue.

Proposed solution

Return true from the error handler or use @ to suppress any errors from preg_match().

[psalm-github-bot]

Hey @Chi-teck, can you reproduce the issue on https://psalm.dev ?

[weirdan]

Return true from the error handler

Yeah, I believe this was the idea. Feel free to PR.