'rustc' panicked at 'failed to create span for type arguments'

[PSeitz]

Hi,
this code leads to a panic in the compiler with cargo clippy:

#[derive(Clone)]
pub struct HashMap<V, S> {
    hash_builder: S,
    table: RawTable<V>,
}

#[derive(Clone)]
pub struct RawTable<V> {
    size: usize,
    val: V
}

I did put the code in a small repo:

• git clone https://github.com/PSeitz/span_err
• cargo clippy (I don't know how to see all compiler flags from clippy for the rustc command)

note: rustc 1.30.0-nightly (f8d3459 2018-08-30) running on x86_64-unknown-linux-gnu
note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib

rustc 1.30.0-nightly (f8d34596f 2018-08-30)
binary: rustc
commit-hash: f8d34596ff74da91e0877212a9979cb9ca13eb7e
commit-date: 2018-08-30
host: x86_64-unknown-linux-gnu
release: 1.30.0-nightly
LLVM version: 7.0

[PSeitz]

Probably related: rust-lang/rust-clippy#2306

[PSeitz]

Edit I'll close this. By the stacktrace it seems to be cause by a clippy plugin:

thread 'rustc' panicked at 'failed to create span for type arguments', libcore/option.rs:1000:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::sys_common::backtrace::print
             at libstd/sys_common/backtrace.rs:71
             at libstd/sys_common/backtrace.rs:59
   2: std::panicking::default_hook::{{closure}}
             at libstd/panicking.rs:211
   3: std::panicking::default_hook
             at libstd/panicking.rs:227
   4: rustc::util::common::panic_hook
   5: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:481
   6: std::panicking::continue_panic_fmt
             at libstd/panicking.rs:391
   7: rust_begin_unwind
             at libstd/panicking.rs:326
   8: core::panicking::panic_fmt
             at libcore/panicking.rs:77
   9: core::option::expect_failed
             at libcore/option.rs:1000
  10: <clippy_lints::types::ImplicitHasher as rustc::lint::LateLintPass<'a, 'tcx>>::check_item
  11: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item
  12: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod
  13: rustc::hir::intravisit::walk_crate
  14: rustc::lint::context::check_crate
  15: rustc::util::common::time
  16: rustc::ty::context::tls::enter_context
  17: <std::thread::local::LocalKey<T>>::with
  18: rustc::ty::context::TyCtxt::create_and_enter
  19: rustc_driver::driver::compile_input
  20: rustc_driver::run_compiler_with_pool
  21: <scoped_tls::ScopedKey<T>>::set
  22: rustc_driver::run_compiler
  23: <scoped_tls::ScopedKey<T>>::set