Attempting to reindent code results in error

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Hello.

When working on Ada sources and trying to re-indent a region or simply
pressing TAB anywhere I get:

wisi--run-parse: error: CONSTRAINT_ERROR :
sal-gen_definite_doubly_linked_lists.adb:167 access check failed

It sounds more like the problem in the code of Ada parser rather than
my configuration error. Is this something you are aware of? Anything I
can do to get automatic indenting work?

Thanks!