Fix handling of for loops in regionck #18780
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When establishing region links within a pattern, use the mem-cat of the type the pattern matches against (that is, the result of `iter.next()`) rather than that of the iterator type. Closes rust-lang#17068 Closes rust-lang#18767
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cc @eddyb |
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Use the mem-cat of the iterator element type rather than the iterator itself when processing the for loop pattern.
Closes #17068
Closes #18767