ICE when trying to execute a turbofish method of an error value

[kennytm]

Repro:

fn main() {
    please.crash::<u8>();
}

This crashes on 1.22+ (no repro on 1.21 or below):

error[E0425]: cannot find value `please` in this scope
 --> 1.rs:2:5
  |
2 |     please.crash::<u8>();
  |     ^^^^^^ not found in this scope

error: internal compiler error: src/librustc_typeck/check/mod.rs:2015: no type for node 7: type u8 (id=7) in fcx 0x70000b83c4a8

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 1.22.0-nightly (26015da01 2017-09-23) running on x86_64-apple-darwin

note: run with `RUST_BACKTRACE=1` for a backtrace

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:492:8
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
   1: std::sys_common::backtrace::_print
   2: std::panicking::default_hook::{{closure}}
   3: std::panicking::default_hook
   4: std::panicking::rust_panic_with_hook
   5: std::panicking::begin_panic
   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::writeback::WritebackCx<'cx, 'gcx, 'tcx> as rustc::hir::intravisit::Visitor<'gcx>>::visit_ty
  12: rustc::hir::intravisit::walk_path_parameters
  13: <rustc_typeck::check::writeback::WritebackCx<'cx, 'gcx, 'tcx> as rustc::hir::intravisit::Visitor<'gcx>>::visit_expr
  14: <rustc_typeck::check::writeback::WritebackCx<'cx, 'gcx, 'tcx> as rustc::hir::intravisit::Visitor<'gcx>>::visit_block
  15: <rustc_typeck::check::writeback::WritebackCx<'cx, 'gcx, 'tcx> as rustc::hir::intravisit::Visitor<'gcx>>::visit_expr
  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::ty::context::TyCtxt::create_and_enter
  29: rustc_driver::driver::compile_input
  30: rustc_driver::run_compiler

---

[kennytm]

cc @petrochenkov WritebackCx::visit_ty was added in #44633.

[nikomatsakis]

triage: P-high

Assigning to @petrochenkov as this is believed to be due to #44633.

[nikomatsakis]

@petrochenkov -- let us know if you don't have time to tackle this right now!

[petrochenkov]

@nikomatsakis
I'm on vacation until Oct. 5
I occasionally have access to an old PC, but I'm not sure it will be able to build rustc, I'll try.