Tomasz Miąsko 8a8ee1a3ed inliner: Use substs_for_mir_body
Changes from 68965 extended the kind of instances that are being
inlined. For some of those, the `instance_mir` returns a MIR body that
is already expressed in terms of the types found in substitution array,
and doesn't need further substitution.

Use `substs_for_mir_body` to take that into account.
2020-11-06 00:00:00 +00:00
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2020-11-06 00:00:00 +00:00