Closed
Description
STR
use std::marker::PhantomData;
struct A<T> {
x: PhantomData<T>,
}
impl A<()> {
fn foo() -> A<()> {
<A<()> as A<()>>::foo()
}
}
impl<T> A<T> {
fn foo() -> A<T> {
A { x: PhantomData }
}
}
fn main() {}Output
error[E0404]: `A` is not a trait
--> x.rs:9:19
|
9 | <A<()> as A<()>>::foo()
| ^^^^^^^^^^^ expected trait, found struct
error: internal compiler error: unexpected panic
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
thread 'rustc' panicked at 'assertion failed: `(left == right)` (left: `Some(A<()>)`, right: `None`)', ../src/librustc_typeck/astconv.rs:1449
note: Run with `RUST_BACKTRACE=1` for a backtrace.
Backtrace
1: 0x7fcca1ecb7ba - std::sys::imp::backtrace::tracing::imp::write::hbea47d9dd19b523c
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:42
2: 0x7fcca1eda68f - std::panicking::default_hook::{{closure}}::h6875a2976258b020
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:247
3: 0x7fcca1eda22d - std::panicking::default_hook::h88ffbc5922643264
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:257
4: 0x7fcca1edab37 - std::panicking::rust_panic_with_hook::hc790e47d4ecc86cd
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:451
5: 0x7fcca1eda9c4 - std::panicking::begin_panic::hc066339e2fdc17d1
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:413
6: 0x7fcca1eda8e9 - std::panicking::begin_panic_fmt::h5912b2d2df332044
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:397
7: 0x7fcc9f96fc96 - <rustc_typeck::astconv::AstConv<'gcx, 'tcx> + 'o>::def_to_ty::hbf810e97ae799c31
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/astconv.rs:1449
8: 0x7fcc9f971288 - <rustc_typeck::astconv::AstConv<'gcx, 'tcx> + 'o>::ast_ty_to_ty::hf6fefe4765e7b7a7
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/astconv.rs:1658
9: 0x7fcc9f95ab27 - rustc_typeck::check::FnCtxt::resolve_ty_and_def_ufcs::h7e53e5221dc15256
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:1869
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:4066
10: 0x7fcc9f94ac58 - rustc_typeck::check::FnCtxt::check_expr_kind::hfeeca7568cc99087
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:3627
11: 0x7fcc9f949a32 - rustc_typeck::check::FnCtxt::check_expr_with_expectation_and_lvalue_pref::h5d7f5141d7386bb8
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:3460
12: 0x7fcc9f91b5d4 - rustc_typeck::check::callee::<impl rustc_typeck::check::FnCtxt<'a, 'gcx, 'tcx>>::check_call::h762a25d0c9a1f5b4
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:2801
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:2805
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/callee.rs:51
13: 0x7fcc9f94aaca - rustc_typeck::check::FnCtxt::check_expr_kind::hfeeca7568cc99087
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:3813
14: 0x7fcc9f949a32 - rustc_typeck::check::FnCtxt::check_expr_with_expectation_and_lvalue_pref::h5d7f5141d7386bb8
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:3460
15: 0x7fcc9f95b6ae - rustc_typeck::check::FnCtxt::check_block_with_expected::he90dd72b6855e5e4
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:2801
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:4208
16: 0x7fcc9f949f02 - rustc_typeck::check::FnCtxt::check_expr_kind::hfeeca7568cc99087
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:3810
17: 0x7fcc9f949a32 - rustc_typeck::check::FnCtxt::check_expr_with_expectation_and_lvalue_pref::h5d7f5141d7386bb8
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:3460
18: 0x7fcc9f930c4d - rustc_typeck::check::check_fn::h96bd864b4d4fc711
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:2801
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:2795
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:2788
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:824
19: 0x7fcc9f92f87b - rustc_typeck::check::check_bare_fn::h87386ea43f4e272e
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:661
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:502
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/infer/mod.rs:441
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1033
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/thread/local.rs:245
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1030
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:846
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/infer/mod.rs:441
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:502
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:651
20: 0x7fcc9f9325ec - rustc_typeck::check::check_item_body::h1e039ede2f960fb9
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:938
21: 0x7fcc9f92d0cd - rustc_typeck::check::check_item_bodies::hd22adb7703cc56d7
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:565
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/dep_graph/visit.rs:45
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/hir/mod.rs:456
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/dep_graph/visit.rs:67
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/mod.rs:2681
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:591
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/session/mod.rs:232
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/check/mod.rs:589
22: 0x7fcc9f998a92 - rustc_typeck::check_crate::h92f6bdfe03b6afba
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/lib.rs:350
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/util/common.rs:34
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_typeck/lib.rs:350
23: 0x7fcca2281a51 - rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}::hd97ec26bf3a98036
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:896
24: 0x7fcca226a628 - rustc_driver::driver::phase_3_run_analysis_passes::h6d446abb74c09795
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1033
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/thread/local.rs:245
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1030
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1017
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/thread/local.rs:245
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1014
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:782
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:866
25: 0x7fcca225a3d2 - rustc_driver::driver::compile_input::h8e119234b60571d5
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:172
26: 0x7fcca22a0418 - rustc_driver::run_compiler::h57c4f233cd1a0c04
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/lib.rs:221
27: 0x7fcca21ba938 - std::panicking::try::do_call::hf679f17bf3b43b0b
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/lib.rs:1117
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/lib.rs:137
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/lib.rs:1051
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panic.rs:295
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:356
28: 0x7fcca1ee507a - __rust_maybe_catch_panic
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libpanic_unwind/lib.rs:97
29: 0x7fcca21dd558 - <F as alloc::boxed::FnBox<A>>::call_box::h21b5b32059700da6
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:332
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panic.rs:351
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/thread/mod.rs:287
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/liballoc/boxed.rs:595
30: 0x7fcca1ed94f4 - std::sys::imp::thread::Thread::new::thread_start::h8084b1107992ae5b
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/liballoc/boxed.rs:605
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/sys_common/thread.rs:21
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/sys/unix/thread.rs:84
31: 0x7fcc9a0ff433 - start_thread
32: 0x7fcca1ba328c - clone
33: 0x0 - <unknown>
Meta
rustc 1.15.0-nightly (daf8c1dfc 2016-12-05)
binary: rustc
commit-hash: daf8c1dfce3b448fc581cc319f64632ec22bd0e1
commit-date: 2016-12-05
host: x86_64-unknown-linux-gnu
release: 1.15.0-nightly
LLVM version: 3.9