Compiling playground v0.0.1 (/playground) error: internal compiler error: no errors encountered even though `delay_span_bug` issued error: internal compiler error: broken MIR in Item(WithOptConstParam { did: DefId(0:8 ~ playground[3faf]::{impl#0}::add), const_param_did: None }) (end of phase transition to Optimized) at bb0[2]: Cannot perform arithmetic on type WrapInt8 --> src/main.rs:12:9 | 12 | wrapping_add(self, other) | ^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: delayed at compiler/rustc_const_eval/src/transform/validate.rs:127:36 thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1368:13 stack backtrace: 0: 0x7f216626ffcd - std::backtrace_rs::backtrace::libunwind::trace::h9dd319c001cd5d5b at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5 1: 0x7f216626ffcd - std::backtrace_rs::backtrace::trace_unsynchronized::h5cdb9413f7b7f703 at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7f216626ffcd - std::sys_common::backtrace::_print_fmt::h62e01fe71d2f0609 at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/sys_common/backtrace.rs:66:5 3: 0x7f216626ffcd - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb568664ce7d28696 at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/sys_common/backtrace.rs:45:22 4: 0x7f21662cbe5c - core::fmt::write::hff09181fc8f150c2 at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/core/src/fmt/mod.rs:1196:17 5: 0x7f21662616c1 - std::io::Write::write_fmt::h77801493f17dbb5a at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/io/mod.rs:1654:15 6: 0x7f2166272cb5 - std::sys_common::backtrace::_print::hace3cc1f256ece45 at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/sys_common/backtrace.rs:48:5 7: 0x7f2166272cb5 - std::sys_common::backtrace::print::hc1b81d3f2867b83b at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/sys_common/backtrace.rs:35:9 8: 0x7f2166272cb5 - std::panicking::default_hook::{{closure}}::he802b1e81f85775c at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/panicking.rs:295:22 9: 0x7f21662729d6 - std::panicking::default_hook::h57b0d510bf2c9fe7 at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/panicking.rs:314:9 10: 0x7f2166a3c211 - rustc_driver[8a2d58f6f4bf431a]::DEFAULT_HOOK::{closure#0}::{closure#0} 11: 0x7f216627338a - std::panicking::rust_panic_with_hook::hdd373bc6c22fa56f at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/panicking.rs:702:17 12: 0x7f2167bdb181 - std[aa967257b9f8f73b]::panicking::begin_panic::<rustc_errors[1ed68885dba1d6d1]::ExplicitBug>::{closure#0} 13: 0x7f2167bd9e06 - std[aa967257b9f8f73b]::sys_common::backtrace::__rust_end_short_backtrace::<std[aa967257b9f8f73b]::panicking::begin_panic<rustc_errors[1ed68885dba1d6d1]::ExplicitBug>::{closure#0}, !> 14: 0x7f2167bedd56 - std[aa967257b9f8f73b]::panicking::begin_panic::<rustc_errors[1ed68885dba1d6d1]::ExplicitBug> 15: 0x7f2167bf1ec6 - std[aa967257b9f8f73b]::panic::panic_any::<rustc_errors[1ed68885dba1d6d1]::ExplicitBug> 16: 0x7f21694638e1 - <rustc_errors[1ed68885dba1d6d1]::HandlerInner as core[8467f2214112d7a4]::ops::drop::Drop>::drop 17: 0x7f2168bcf7a8 - core[8467f2214112d7a4]::ptr::drop_in_place::<rustc_session[f5a33ef05da8b8fa]::parse::ParseSess> 18: 0x7f2168bd1ac3 - <alloc[e5cd0633e65a6c1f]::rc::Rc<rustc_session[f5a33ef05da8b8fa]::session::Session> as core[8467f2214112d7a4]::ops::drop::Drop>::drop 19: 0x7f2168bce36d - core[8467f2214112d7a4]::ptr::drop_in_place::<rustc_interface[b93c8180971df832]::interface::Compiler> 20: 0x7f2168bcdd94 - rustc_span[4bbade9624b8160a]::with_source_map::<core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>, rustc_interface[b93c8180971df832]::interface::create_compiler_and_run<core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>, rustc_driver[8a2d58f6f4bf431a]::run_compiler::{closure#1}>::{closure#1}> 21: 0x7f2168bba454 - rustc_interface[b93c8180971df832]::interface::create_compiler_and_run::<core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>, rustc_driver[8a2d58f6f4bf431a]::run_compiler::{closure#1}> 22: 0x7f2168ba4792 - <scoped_tls[6dc72d687799c0be]::ScopedKey<rustc_span[4bbade9624b8160a]::SessionGlobals>>::set::<rustc_interface[b93c8180971df832]::interface::run_compiler<core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>, rustc_driver[8a2d58f6f4bf431a]::run_compiler::{closure#1}>::{closure#0}, core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>> 23: 0x7f2168bbbb3f - std[aa967257b9f8f73b]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[b93c8180971df832]::util::run_in_thread_pool_with_globals<rustc_interface[b93c8180971df832]::interface::run_compiler<core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>, rustc_driver[8a2d58f6f4bf431a]::run_compiler::{closure#1}>::{closure#0}, core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>>::{closure#0}, core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>> 24: 0x7f2168bbbc79 - <<std[aa967257b9f8f73b]::thread::Builder>::spawn_unchecked_<rustc_interface[b93c8180971df832]::util::run_in_thread_pool_with_globals<rustc_interface[b93c8180971df832]::interface::run_compiler<core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>, rustc_driver[8a2d58f6f4bf431a]::run_compiler::{closure#1}>::{closure#0}, core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>>::{closure#0}, core[8467f2214112d7a4]::result::Result<(), rustc_errors[1ed68885dba1d6d1]::ErrorGuaranteed>>::{closure#1} as core[8467f2214112d7a4]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 25: 0x7f216627d2a3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf3233b13e94151c3 at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/alloc/src/boxed.rs:1872:9 26: 0x7f216627d2a3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4e8ef0a8db850d9e at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/alloc/src/boxed.rs:1872:9 27: 0x7f216627d2a3 - std::sys::unix::thread::Thread::new::thread_start::haa7458da1d6aafbd at /rustc/ebbcbfc236ced21d5e6a92269edb704692ff26b8/library/std/src/sys/unix/thread.rs:108:17 28: 0x7f21661a3609 - start_thread 29: 0x7f21660c6133 - clone 30: 0x0 - <unknown> 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 1.63.0-nightly (ebbcbfc23 2022-05-27) running on x86_64-unknown-linux-gnu note: compiler flags: --crate-type bin -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2 note: some of the compiler flags provided by cargo are hidden query stack during panic: end of query stack error: could not compile `playground`