First time filing a bug report, apologies if i missed anything or if this is a duplicate. Encountered this bug while writing some non-sensical associated function types. Searched around for any similar issues and the closest i found was #70291, seems closely related?
Minimal example:
pub trait MyTrait {
type AssocFn: std::ops::Fn(_);
}
fn main() {}Playground link:
https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=02cf6fb6aed04c3058b258f5f41200d2
The ICE happens on all channels it seems
Backtrace
thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', src/librustc_errors/lib.rs:366:17
stack backtrace:
0: backtrace::backtrace::libunwind::trace
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
1: backtrace::backtrace::trace_unsynchronized
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
2: std::sys_common::backtrace::_print_fmt
at src/libstd/sys_common/backtrace.rs:78
3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
at src/libstd/sys_common/backtrace.rs:59
4: core::fmt::write
at src/libcore/fmt/mod.rs:1076
5: std::io::Write::write_fmt
at src/libstd/io/mod.rs:1537
6: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:62
7: std::sys_common::backtrace::print
at src/libstd/sys_common/backtrace.rs:49
8: std::panicking::default_hook::{{closure}}
at src/libstd/panicking.rs:198
9: std::panicking::default_hook
at src/libstd/panicking.rs:218
10: rustc_driver::report_ice
11: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:490
12: std::panicking::begin_panic
13: <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop
14: core::ptr::drop_in_place
15: <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop
16: core::ptr::drop_in_place
17: rustc_interface::interface::run_compiler_in_existing_thread_pool
18: rustc_ast::attr::with_globals
note: rustc 1.45.0 (5c1f21c3b 2020-07-13) running on x86_64-unknown-linux-gnu
note: compiler flags: -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 --crate-type bin
First time filing a bug report, apologies if i missed anything or if this is a duplicate. Encountered this bug while writing some non-sensical associated function types. Searched around for any similar issues and the closest i found was #70291, seems closely related?
Minimal example:
Playground link:
https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=02cf6fb6aed04c3058b258f5f41200d2
The ICE happens on all channels it seems
Backtrace