Compile panic on Rust nightly when compiling Rocket version 0.5.0-rc.1

[Bernie]

Code

Compile panic occurred while compiling Rocket version 0.5.0-rc.1
(rocket = "0.5.0-rc.1")

Meta

rustc --version --verbose:

rustc 1.60.0-nightly (0c292c966 2022-02-08) running on x86_64-unknown-linux-gnu

Error output

error: internal compiler error: encountered ambiguity selecting `Binder(<response::stream::reader::ReaderStream<impl futures::Stream<Item = response::stream::raw_sse::RawLinedEvent>> as std::convert::From<impl futures::Stream<Item = response::stream::raw_sse::RawLinedEvent>>>, [])` during codegen, presuming due to overflow or prior type error
  |
  = note: delayed at compiler/rustc_trait_selection/src/traits/codegen.rs:54:32

error: internal compiler error: unexpected panic

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

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.60.0-nightly (0c292c966 2022-02-08) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -Z macro-backtrace

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: could not compile `rocket`

Backtrace

``` thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:1176:13 stack backtrace: 0: rust_begin_unwind at /rustc/0c292c9667f1b202a9150d58bdd2e89e3e803996/library/std/src/panicking.rs:584:5 1: core::panicking::panic_fmt at /rustc/0c292c9667f1b202a9150d58bdd2e89e3e803996/library/core/src/panicking.rs:143:14 2: core::panicking::panic_display::<&str> 3: ::flush_delayed 4: ::drop 5: core::ptr::drop_in_place:: 6: as core::ops::drop::Drop>::drop 7: core::ptr::drop_in_place:: 8: rustc_span::with_source_map::, rustc_interface::interface::create_compiler_and_run, rustc_driver::run_compiler::{closure#1}>::{closure#1}> 9: rustc_interface::interface::create_compiler_and_run::, rustc_driver::run_compiler::{closure#1}> note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace. ```

[ehuss]

Thanks for the report! Closing as a duplicate of #93831. This should be fixed on the latest nightly.