Description
While in the course of writing some code I happened across the following ICE when running cargo check with the current stable version of the compiler. I tried the same on a nightly build and got the same error.
This code is not at all anything I'd consider remotely presentable, but it seems attempts to try and minimize don't trigger the ICE. Similarly, fixing either of the compilation errors prior to the ICE also prevent its occurrence. This leads me to think this is some wild corner case, but hopefully will be useful.
stable compiler: rustc 1.19.0 (0ade339 2017-07-17)
nightly compiler: rustc 1.20.0-nightly (ae98ebf 2017-07-20)
$ uname -a
Linux mogul 4.12.4-1-ARCH #1 SMP PREEMPT Fri Jul 28 18:54:18 UTC 2017 x86_64 GNU/Linux
Please let me know if you are unable to reproduce. Thanks
rustic.zip
Error:
error: internal compiler error: /checkout/src/librustc_typeck/check/mod.rs:1984: no type for node 443: expr Err(::fmt::format(<::std::fmt::Arguments>::new_v1({
static __STATIC_FMTSTR:
&'static [&'static str]
=
&["not implemented (",
":", ")"];
__STATIC_FMTSTR
},
&match (&"src/git/repo.rs",
&47u32) {
(__arg0, __arg1) =>
[<::std::fmt::ArgumentV1>::new(__arg0,
::std::fmt::Display::fmt),
<::std::fmt::ArgumentV1>::new(__arg1,
::std::fmt::Display::fmt)],
})).into()) (id=443) in fcx 0x7fce723f36e0
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
note: rustc 1.20.0-nightly (ae98ebf 2017-07-20) running on x86_64-unknown-linux-gnu
note: run with RUST_BACKTRACE=1 for a backtrace
thread 'rustc' panicked at 'Box', /checkout/src/librustc_errors/lib.rs:489:8
note: Some details are omitted, run with RUST_BACKTRACE=full for a verbose backtrace.
stack backtrace:
0: std::sys::imp::backtrace::tracing::imp::unwind_backtrace
at /checkout/src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
1: std::sys_common::backtrace::_print
at /checkout/src/libstd/sys_common/backtrace.rs:71
2: std::panicking::default_hook::{{closure}}
at /checkout/src/libstd/sys_common/backtrace.rs:60
at /checkout/src/libstd/panicking.rs:380
3: std::panicking::default_hook
at /checkout/src/libstd/panicking.rs:390
4: std::panicking::rust_panic_with_hook
at /checkout/src/libstd/panicking.rs:611
5: std::panicking::begin_panic_new
6: rustc_errors::Handler::bug
7: rustc::session::opt_span_bug_fmt::{{closure}}
8: rustc::session::opt_span_bug_fmt
9: rustc::session::bug_fmt
10: rustc_typeck::check::FnCtxt::node_ty
11: <rustc_typeck::check::regionck::RegionCtxt<'a, 'gcx, 'tcx> as rustc::hir::intravisit::Visitor<'gcx>>::visit_expr
12: <rustc_typeck::check::regionck::RegionCtxt<'a, 'gcx, 'tcx> as rustc::hir::intravisit::Visitor<'gcx>>::visit_expr
13: rustc::hir::intravisit::walk_expr
14: <rustc_typeck::check::regionck::RegionCtxt<'a, 'gcx, 'tcx> as rustc::hir::intravisit::Visitor<'gcx>>::visit_expr
15: rustc_typeck::check::regionck::RegionCtxt::visit_fn_body
16: rustc_typeck::check::typeck_tables_of::{{closure}}
17: rustc_typeck::check::typeck_tables_of
18: rustc::dep_graph::graph::DepGraph::with_task
19: rustc::ty::maps::<impl rustc::ty::maps::queries::typeck_tables_of<'tcx>>::try_get
20: rustc::ty::maps::TyCtxtAt::typeck_tables_of
21: rustc::ty::maps::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::typeck_tables_of
22: rustc_typeck::check::typeck_item_bodies
23: rustc::dep_graph::graph::DepGraph::with_task
24: rustc::ty::maps::<impl rustc::ty::maps::queries::typeck_item_bodies<'tcx>>::try_get
25: rustc::ty::maps::TyCtxtAt::typeck_item_bodies
26: rustc::ty::maps::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::typeck_item_bodies
27: rustc_typeck::check_crate
28: rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}
29: rustc_driver::driver::phase_3_run_analysis_passes
30: rustc_driver::driver::compile_input
31: rustc_driver::run_compiler