The `CHECK` for `(int)` was too strict. On macOS the type prints as:
```
08:46:24 29: (lldb) v -T ExpectedRef
08:46:24 30: (llvm::Expected<int &>) ExpectedRef = {
08:46:24 next:14'0 X error: no match found
08:46:24 31: (std::__1::reference_wrapper<int>::type) value = 100
08:46:24 next:14'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
08:46:24 next:14'1 ? possible intended match
08:46:24 32: }
08:46:24 next:14'0 ~~
```
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