Have a look at if-elsif weirdness (and the explanation at Re: if-elsif weirdness) where the same issue was addressed some time ago.

It looks like it's either a well known bug or a behavior which most of the people are happy living with. :)

In reply to Re: Error messages point to wrong line number in if-elsif construct by cchampion
in thread Error messages point to wrong line number in if-elsif construct by Sandy

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