fix(moncaco/validate): handle metadata being undefined #202
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Description
It's possible for an error returned from the
validateDSL
method inlanguage
to return no metadata (1, 2), based on documentation/the source code from ANTRL this would indicate that the error arose from the lexer but unfortunately I've not been able to come up with a case where I can reproduce this to write a test from.That said, based on the error shown in Sentry and the surrounding code this is a fairly certain fix for the issue.
References
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