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ICE: When using an associated type as the type parameter of a bound #19081

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japaric opened this issue Nov 18, 2014 · 0 comments · Fixed by #19780
Closed

ICE: When using an associated type as the type parameter of a bound #19081

japaric opened this issue Nov 18, 2014 · 0 comments · Fixed by #19780
Labels
A-associated-items Area: Associated items (types, constants & functions) E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

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@japaric
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japaric commented Nov 18, 2014

Found this ICE while trying to convert the S in Hasher<S> into an associated type. (FWIW, I also hit #18611 in the process)

STR

#![feature(associated_types)]

pub trait Hasher{
    type State;

    fn hash<T: Hash< <Self as Hasher>::State>>(&self, value: &T) -> u64;
}

trait Hash<S> {
    fn hash(&self, state: &mut S);
}

Output

task 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 0', /var/tmp/paludis/build/dev-lang-rust-scm/work/rust-scm/src/librustc/middle/subst.rs:388

stack backtrace:
   1:     0x7f702c7a9560 - rt::backtrace::imp::write::h2fa8e210cbdd14ecdUs
   2:     0x7f702c7ac5f0 - <unknown>
   3:     0x7f702cf5b320 - unwind::begin_unwind_inner::h2bf101b14ceccda8Pad
   4:     0x7f702cf5afa0 - unwind::begin_unwind_fmt::hc4fd72ddd00fb220h8c
   5:     0x7f702cf5af60 - rust_begin_unwind
   6:     0x7f702cf978b0 - panicking::panic_fmt::he52a5729773324b60Nl
   7:     0x7f702cf9cca0 - panicking::panic_bounds_check::h71560967a4c6e019yMl
   8:     0x7f702bb315a0 - middle::typeck::collect::is_associated_type_valid_for_param::h82471e75169a62c6R7D
   9:     0x7f702bb40370 - <unknown>
  10:     0x7f702bb23ea0 - <unknown>
  11:     0x7f702b910790 - <unknown>
  12:     0x7f702bb22670 - <unknown>
  13:     0x7f702bb221d0 - <unknown>
  14:     0x7f702bb220d0 - <unknown>
  15:     0x7f702bb21f20 - <unknown>
  16:     0x7f702bb1e750 - <unknown>
  17:     0x7f702baf86d0 - middle::typeck::collect::convert::hb88dec01b4ea2521NwE
  18:     0x7f702baf1f60 - middle::typeck::collect::collect_item_types::hcb8bf5c174f5a33bTvD
  19:     0x7f702bd08a50 - <unknown>
  20:     0x7f702bd07bc0 - middle::typeck::check_crate::ha3047a37f1357500XhJ
  21:     0x7f702d4420c0 - driver::driver::phase_3_run_analysis_passes::h4b7343c1d32e3d38RLR
  22:     0x7f702d436ee0 - driver::driver::compile_input::h5f97124b77daf0b6BsR
  23:     0x7f702d4b7a30 - <unknown>
  24:     0x7f702d4b7920 - <unknown>
  25:     0x7f702d2da520 - <unknown>
  26:     0x7f702d2da310 - <unknown>
  27:     0x7f702d7d9b90 - <unknown>
  28:     0x7f702cfaa680 - <unknown>
  29:     0x7f702cfaa670 - rust_try
  30:     0x7f702cf58c80 - unwind::try::h00b99ef8aa34ae99rZc
  31:     0x7f702cf58b10 - task::Task::run::h5f5b9665aeb0e846h5b
  32:     0x7f702d7d98d0 - <unknown>
  33:     0x7f702cf5a330 - <unknown>
  34:     0x7f7027b521d0 - start_thread
  35:     0x7f702cc311b9 - clone
  36:                0x0 - <unknown>

Version

rustc 0.13.0-dev (618bd5d1c 2014-11-18 15:26:43 +0000)

cc @nikomatsakis

@huonw huonw added I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ A-associated-items Area: Associated items (types, constants & functions) labels Nov 20, 2014
@ghost ghost added the E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. label Dec 12, 2014
bors added a commit that referenced this issue Dec 18, 2014
Closes #5988.
Closes #10176.
Closes #10456.
Closes #12744.
Closes #13264.
Closes #13324.
Closes #14182.
Closes #15381.
Closes #15444.
Closes #15480.
Closes #15756.
Closes #16822.
Closes #16966.
Closes #17351.
Closes #17503.
Closes #17545.
Closes #17771.
Closes #17816.
Closes #17897.
Closes #17905.
Closes #18188.
Closes #18232.
Closes #18345.
Closes #18389.
Closes #18400.
Closes #18502.
Closes #18611.
Closes #18783.
Closes #19009.
Closes #19081.
Closes #19098.
Closes #19127.
Closes #19135.
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Labels
A-associated-items Area: Associated items (types, constants & functions) E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
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