ICE: No `move_errors` should be allowed in MIR borrowck

[jurkstas]

I get an ICE when I try to build evolvim:

error: internal compiler error: No `move_errors` should be allowed in MIR borrowck
   --> evolvim-lib\./src/lib\neat\genome\mod.rs:100:13
    |
100 |             InputType::Eye(EYE[2]).clone(),
    |             ^^^^^^^^^^^^^^^^^^^^^^

error: internal compiler error: No `move_errors` should be allowed in MIR borrowck
  --> evolvim-lib\./src/lib\neat\genome\mod.rs:99:13
   |
99 |             InputType::Eye(EYE[1]).clone(),
   |             ^^^^^^^^^^^^^^^^^^^^^^

error: internal compiler error: No `move_errors` should be allowed in MIR borrowck
  --> evolvim-lib\./src/lib\neat\genome\mod.rs:98:13
   |
98 |             InputType::Eye(EYE[0]).clone(),
   |             ^^^^^^^^^^^^^^^^^^^^^^

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', src\librustc_errors\lib.rs:357:17
stack backtrace:
   0: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
   1: core::fmt::write
   2: <std::io::IoSliceMut as core::fmt::Debug>::fmt
   3: std::panicking::take_hook
   4: std::panicking::take_hook
   5: rustc_driver::report_ice
   6: std::panicking::rust_panic_with_hook
   7: <rustc_errors::snippet::Style as core::fmt::Debug>::fmt
   8: <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop
   9: rustc_driver::pretty::print_after_hir_lowering
  10: rustc_driver::pretty::print_after_hir_lowering
  11: rustc_driver::pretty::print_after_hir_lowering
  12: rustc_driver::pretty::print_after_hir_lowering
  13: <env_logger::filter::inner::Filter as core::fmt::Display>::fmt
  14: <env_logger::filter::inner::Filter as core::fmt::Display>::fmt
  15: <env_logger::filter::inner::Filter as core::fmt::Display>::fmt
  16: _rust_maybe_catch_panic
  17: rustc_driver::pretty::print_after_hir_lowering
  18: ZN244_$LT$std..error..$LT$impl$u20$core..convert..From$LT$alloc..string..String$GT$$u20$for$u20$alloc..boxed..Box$LT$dyn$u20$std..error..Error$u2b$core..marker..Sync$u2b$core..marker..Send$GT$$GT$..from..StringError$u20$as$u20$core..fmt..Display$GT$3fmt17
  19: std::sys::windows::thread::Thread::new
  20: BaseThreadInitThunk
  21: RtlUserThreadStart
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

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

I tried stable, beta and nightly. All ended with an ICE.

>rustc --version --verbose
rustc 1.42.0 (b8cedc004 2020-03-09)
binary: rustc
commit-hash: b8cedc00407a4c56a3bda1ed605c6fc166655447
commit-date: 2020-03-09
host: x86_64-pc-windows-msvc
release: 1.42.0
LLVM version: 9.0

[jonas-schievink]

Important detail: Only happens on the develop branch, not master

[jonas-schievink]

(bisecting)

[jurkstas]

Important detail: Only happens on the develop branch, not master

It happens with master branch as well if I do cargo update before building. Without it, it fails due to nalgebra issue before it even gets to evolvim-lib.

[jonas-schievink]

Ah, I see

[jonas-schievink]

regression in nightly-2019-08-17

f7af19c...bdfd698

[spastorino]

@jonas-schievink great :). Unsure if you're bisecting this further, anyway pinging cleanup crew in case you are not doing it further and also to see if someone is able to get an mcve.

@rustbot ping cleanup

[rustbot]

Hey Cleanup Crew ICE-breakers! This bug has been identified as a good
"Cleanup ICE-breaking candidate". In case it's useful, here are some
instructions for tackling these sorts of bugs. Maybe take a look?
Thanks! <3

cc @AminArria @chrissimpkins @contrun @DutchGhost @elshize @ethanboxx @h-michael @HallerPatrick @hdhoang @hellow554 @imtsuki @jakevossen5 @kanru @KarlK90 @LeSeulArtichaut @MAdrianMattocks @matheus-consoli @mental32 @nmccarty @Noah-Kennedy @pard68 @PeytonT @pierreN @Redblueflame @RobbieClarken @RobertoSnap @robjtede @SarthakSingh31 @senden9 @shekohex @sinato @spastorino @turboladen @woshilapin @yerke