Crash in decoder.rs: 'called Option::unwrap() on a None value', compiler\rustc_metadata\src\rmeta\decoder.rs:1565:75

[Nanduhirion]

Code

I suppose it has something to do with "clone_into" since this was the last line I added. Before that compiling was successful.

         let w: u32 = (b.width - b.x).ceil() as u32;
            let h: u32 = (b.height - b.y).ceil() as u32;
            let mut pixels = vec![127 as u8; (w * h * 4) as usize];
            let fractal: Fractal = calculation::Fractal::new(
                0.0,
                0.0,
                3.0,
                512,
                4.0,
                w as i32,
                h as i32,
                calculation::Fractal::c_modulo,
                4,
                w as i32 *4,
            );
            let p: Arc<Mutex<FractalParams>> = Arc::clone(&fractal.params);
            let p2: MutexGuard<FractalParams> = p.lock().unwrap();
            p2.calculate_fractal();
            let p3 = p2.pixels.lock().unwrap();
            p3.clone_into(&mut pixels);
            let image_handle: Handle = image::Handle::from_pixels(w, h, pixels);

            (
                Primitive::Image { handle: image_handle, bounds: b },

Meta

rustc --version --verbose:

rustc 1.50.0-nightly (e792288df 2020-12-05)
binary: rustc
commit-hash: e792288df31636ca28108516c63a00ce4267063a
commit-date: 2020-12-05
host: x86_64-pc-windows-msvc
release: 1.50.0-nightly

Error output

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler\rustc_metadata\src\rmeta\decoder.rs:1565:75

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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.50.0-nightly (e792288df 2020-12-05) running on x86_64-pc-windows-msvc

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental -C target-feature=+adx,+aes,+amx-bf16,+amx-int8,+amx-tile,+avx,+avx2,+avx512bf16,+avx512bitalg,+avx512bw,+avx512cd,+avx512dq,+avx512er,+avx512f,+avx512ifma,+avx512pf,+avx512vbmi,+avx512vbmi2,+avx512vl,+avx512vnni,+avx512vp2intersect,+avx512vpopcntdq,-bmi,-bmi2,+branchfusion,+clflushopt,+clwb,+cmov,+cx16,+cx8,+enqcmd,+ermsb,+f16c,+fast-11bytenop,+fast-15bytenop,+fast-7bytenop,-fast-bextr,+fast-gather,+fast-hops,+fast-lzcnt,+fast-scalar-fsqrt,+fast-scalar-shift-masks,+fast-shld-rotate,+fast-variable-shuffle,+fast-vector-fsqrt,+fast-vector-shift-masks,+fma,+fma4,+fsgsbase,+fxsr,+gfni,+idivl-to-divb,+idivq-to-divl,+lwp,+lzcnt,+macrofusion,+merge-to-threeway-branch,+mmx,+movbe,+movdir64b,+movdiri,+mwaitx,+nopl,+pad-short-functions,+pclmul,+pconfig,+popcnt,+prefer-256-bit,+prefer-mask-registers,+prfchw,+ptwrite,+rdpid,+rdrnd,+rdseed,+rtm,+sahf,+serialize,+sha,+shstk,+sse,+sse-unaligned-mem,+sse2,+sse3,+sse4.1,+sse4.2,+sse4a,+ssse3,-tbm,+tsxldtrk,+use-aa,+use-glm-div-sqrt-costs,+vaes,+vpclmulqdq,+vzeroupper,+waitpkg,+wbnoinvd,+xop,+xsave,+xsavec,+xsaveopt,+xsaves --crate-type bin

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [codegen_fn_attrs] computing codegen attributes of `futures_task::future_obj::if_alloc::<impl iced_native::futures::future::UnsafeFutureObj<'a, T> for std::boxed::Box<F>>::into_raw`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack

Backtrace

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler\rustc_metadata\src\rmeta\decoder.rs:1565:75
stack backtrace:
   0:     0x7ffcaebbb865 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h106ca6f8fb6a294d
   1:     0x7ffcaebe727b - core::fmt::write::h6390b994d95aebdb
   2:     0x7ffcaebacefd - <std::io::IoSlice as core::fmt::Debug>::fmt::hd713332ae62141f3
   3:     0x7ffcaebbfbdd - std::panicking::take_hook::h78f8a454f3a4df82
   4:     0x7ffcaebbf66a - std::panicking::take_hook::h78f8a454f3a4df82
   5:     0x7ffc9fc61127 - rustc_driver::report_ice::h4bc3647b6f621de8
   6:     0x7ffcaebc0730 - std::panicking::rust_panic_with_hook::h931fd6f26be82856
   7:     0x7ffcaebc01d3 - rust_begin_unwind
   8:     0x7ffcaebbc20f - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h106ca6f8fb6a294d
   9:     0x7ffcaebc0159 - rust_begin_unwind
  10:     0x7ffcaebe32f0 - core::panicking::panic_fmt::h45da916c710b88f7
  11:     0x7ffcaebe323c - core::panicking::panic::h3a7a516f2be28c18
  12:     0x7ffca3404ba6 - rustc_metadata::dynamic_lib::DynamicLibrary::open::h6e15f450696ffdaf
  13:     0x7ffca359eb5d - rustc_metadata::rmeta::decoder::cstore_impl::<impl rustc_middle::middle::cstore::CrateStore for rustc_metadata::creader::CStore>::def_path_hash_to_def_id::hb8b08d53ae47c264
  14:     0x7ffca40f1352 - rustc_middle::ty::query::on_disk_cache::OnDiskCache::compute_cnum_map::hbae92ac2867b06ae
  15:     0x7ffca3f007b9 - rustc_middle::ty::query::force_from_dep_node::h841e1a791cab1f4a
  16:     0x7ffca43d7425 - rustc_middle::ty::context::tls::TLV::__getit::h04ab82409bdf58e1
  17:     0x7ffca43d721a - rustc_middle::ty::context::tls::TLV::__getit::h04ab82409bdf58e1
  18:     0x7ffca4020281 - rustc_middle::ty::context::TyCtxt::_intern_place_elems::hf379b6ef10105517
  19:     0x7ffca42afdd8 - rustc_middle::ty::context::tls::TLV::__getit::h04ab82409bdf58e1
  20:     0x7ffca419c788 - rustc_middle::mir::mono::MonoItem::instantiation_mode::hc366da6f5e5e4fc5
  21:     0x7ffca2be31e4 - <rustc_mir::dataflow::framework::graphviz::CfgEdge as core::fmt::Debug>::fmt::h2537cda26d18b021
  22:     0x7ffca2da2dd8 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  23:     0x7ffca2da24ff - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  24:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  25:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  26:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  27:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  28:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  29:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  30:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  31:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  32:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  33:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  34:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  35:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  36:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  37:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  38:     0x7ffca2da2600 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  39:     0x7ffca2f997d3 - <rustc_mir::util::spanview::SpanViewable as core::fmt::Debug>::fmt::h754ae9e4acd7ca7f
  40:     0x7ffca2da1551 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h3b6010febd9be0ec
  41:     0x7ffca2e53592 - rustc_mir::monomorphize::partitioning::partition::hf4e9b71f30996dc1
  42:     0x7ffca005b6a7 - <rustc_codegen_llvm::back::lto::ThinLTOKeysMap as core::fmt::Debug>::fmt::hcd3349ee8b0cb4a5
  43:     0x7ffc9ff4f3ce - <rustc_ast::ast::StructField as rustc_ast::attr::HasAttrs>::attrs::h9f7930f3acf2c906
  44:     0x7ffc9ff9a637 - <rustc_ast::ast::FloatTy as rustc_codegen_llvm::debuginfo::metadata::MsvcBasicName>::msvc_basic_name::h3aa8bca1fb5698b6
  45:     0x7ffc9ffd3dc1 - rustc_codegen_llvm::type_::<impl rustc_codegen_ssa::traits::type_::LayoutTypeMethods for rustc_codegen_llvm::context::CodegenCx>::reg_backend_type::h5c329ef30d26310a
  46:     0x7ffca00f83e4 - <rustc_codegen_llvm::builder::Builder as rustc_codegen_ssa::traits::builder::BuilderMethods>::unchecked_umul::h41879df1ba38c684
  47:     0x7ffca0072d24 - <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate::h409f60e0ae4aaf13
  48:     0x7ffc9fe58ede - rustc_interface::interface::parse_cfgspecs::he4e421c50de55949
  49:     0x7ffc9fe8d3da - rustc_interface::passes::BoxedResolver::to_resolver_outputs::hb096f93f8cf6df4c
  50:     0x7ffc9fed5a46 - rustc_interface::queries::Queries::ongoing_codegen::ha9e2915cfb307d3a
  51:     0x7ffc9fc08b74 - <rustc_codegen_ssa::back::linker::MsvcLinker as rustc_codegen_ssa::back::linker::Linker>::no_crt_objects::h47dd01e667a15f55
  52:     0x7ffc9fc99aac - <rustc_driver::args::Error as core::fmt::Debug>::fmt::hb838ed2d57a61e3c
  53:     0x7ffc9fc09bfc - <rustc_codegen_ssa::back::linker::MsvcLinker as rustc_codegen_ssa::back::linker::Linker>::no_crt_objects::h47dd01e667a15f55
  54:     0x7ffc9fcb0f84 - <rustc_driver::args::Error as core::fmt::Debug>::fmt::hb838ed2d57a61e3c
  55:     0x7ffc9fcb8270 - rustc_ast::util::parser::prec_let_scrutinee_needs_par::h0da38a96661182e5
  56:     0x7ffc9fc12a3d - <rustc_codegen_ssa::back::linker::MsvcLinker as rustc_codegen_ssa::back::linker::Linker>::no_crt_objects::h47dd01e667a15f55
  57:     0x7ffcaebcf4f7 - std::sys::windows::thread::Thread::new::h05d768f6146b61f1
  58:     0x7ffd47f87034 - BaseThreadInitThunk
  59:     0x7ffd49f3d0d1 - RtlUserThreadStart

[camelid]

Duplicate of #79779.