error[E0308]: mismatched types
  --> $DIR/issue-81943.rs:7:9
   |
LL |   f(|x| lib::d!(x));
   |         ^^^^^^^^^^ expected `()`, found `i32`
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0308]: mismatched types
  --> $DIR/issue-81943.rs:8:28
   |
LL |   f(|x| match x { tmp => { g(tmp) } });
   |         -------------------^^^^^^----
   |         |                  |
   |         |                  expected `()`, found `i32`
   |         expected this to be `()`
   |
help: consider using a semicolon here
   |
LL |   f(|x| match x { tmp => { g(tmp); } });
   |                                  ^
help: consider using a semicolon here
   |
LL |   f(|x| match x { tmp => { g(tmp) } };);
   |                                      ^

error[E0308]: mismatched types
  --> $DIR/issue-81943.rs:10:38
   |
LL |     ($e:expr) => { match $e { x => { g(x) } } }
   |                    ------------------^^^^----
   |                    |                 |
   |                    |                 expected `()`, found `i32`
   |                    expected this to be `()`
LL |   }
LL |   f(|x| d!(x));
   |         ----- in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider using a semicolon here
   |
LL |     ($e:expr) => { match $e { x => { g(x); } } }
   |                                          ^
help: consider using a semicolon here
   |
LL |     ($e:expr) => { match $e { x => { g(x) } }; }
   |                                              ^

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0308`.