error: no rules expected the token `,`
  --> tests/ui/compile-fail/zeroable/with_comma.rs:11:13
   |
11 |       let _ = init!(Foo {
   |  _____________^
12 | |         a: 0,
13 | |         ..Zeroable::zeroed(),
14 | |     });
   | |______^ no rules expected this token in macro call
   |
note: while trying to match `)`
  --> src/macros.rs
   |
   |         @munch_fields($(..Zeroable::zeroed())? $(,)?),
   |                                                     ^
   = note: this error originates in the macro `$crate::__init_internal` which comes from the expansion of the macro `init` (in Nightly builds, run with -Z macro-backtrace for more info)

error: no rules expected the token `,`
  --> tests/ui/compile-fail/zeroable/with_comma.rs:11:13
   |
11 |       let _ = init!(Foo {
   |  _____________^
12 | |         a: 0,
13 | |         ..Zeroable::zeroed(),
14 | |     });
   | |______^ no rules expected this token in macro call
   |
note: while trying to match `)`
  --> src/macros.rs
   |
   |         @munch_fields(..Zeroable::zeroed() $(,)?),
   |                                                 ^
   = note: this error originates in the macro `$crate::__init_internal` which comes from the expansion of the macro `init` (in Nightly builds, run with -Z macro-backtrace for more info)