[BoundsSafety] Fix dynamic-count-invalid-rhs.c test (NFC) #10871
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Since recently, Clang does not attach an invalid statement to function body. In the modified test, the function body won't have
p3->len = asdf;
statement. This makes our dynamic count pointer assignment analysis think that the assignment top3->len
is missing.We could check
Sema::hasAnyUnrecoverableErrorsInThisFunction()
and not run our analysis if there is any error. But, we still want to diagnose problems in other blocks. I am not sure if there is a good way to check if a given block has already any unrecoverable error.rdar://153756387