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8df58ae03a
Always record reference to binding in match if guards When encountering a binding from a `match` pattern in its `if` guard when computing a generator's interior types, we must always record the type of a reference to the binding because of how `if` guards are lowered to MIR. This was missed in #75213 because the binding in that test case was autorefed and we recorded that adjusted type anyway. Fixes #78366
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.