Vec::with_capacity(u64) panics when built

[JesperAxelsson]

Vec::with_capacity(u64) panics.
Error message:

rustc main.rs -v
error: internal compiler error: ../src/librustc_typeck\check/mod.rs:4396: unexpected definition: PrimTy(TyUint(u64))

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

thread 'rustc' panicked at 'Box<Any>', ../src/librustc_errors/lib.rs:423
note: Run with `RUST_BACKTRACE=1` for a backtrace.

Minimal program:
fn main() { let vec = Vec::with_capacity(u64); }

[Stebalien]

Duplicate of #38155 and #38188, fixed in #38154. /cc @petrochenkov

[steveklabnik]

Closing as a duplicate, thank you!