[INFO] cloning repository https://github.com/lolgeny/copper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lolgeny/copper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flolgeny%2Fcopper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flolgeny%2Fcopper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d808ed9070dee5cd4ce477b35e09fa4b9713ae2
[INFO] testing lolgeny/copper against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flolgeny%2Fcopper" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lolgeny/copper on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lolgeny/copper
[INFO] finished tweaking git repo https://github.com/lolgeny/copper
[INFO] tweaked toml for git repo https://github.com/lolgeny/copper written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/lolgeny/copper already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 022d6b9c220e3f793e9fbe1035dd286d380f8cea35833b922349b4838e2c27bc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "022d6b9c220e3f793e9fbe1035dd286d380f8cea35833b922349b4838e2c27bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "022d6b9c220e3f793e9fbe1035dd286d380f8cea35833b922349b4838e2c27bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "022d6b9c220e3f793e9fbe1035dd286d380f8cea35833b922349b4838e2c27bc", kill_on_drop: false }`
[INFO] [stdout] 022d6b9c220e3f793e9fbe1035dd286d380f8cea35833b922349b4838e2c27bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b78caea04e5b4bcf960e2882ef01fd9bfefd6accf4c137cfa8da125a024ae26
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7b78caea04e5b4bcf960e2882ef01fd9bfefd6accf4c137cfa8da125a024ae26", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.62
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling copper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stdout] warning: lint `rustdoc` has been removed: use `rustdoc::all` instead
[INFO] [stdout]  --> src/lib.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![warn(rustdoc)]
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `(`, `,`, `=`, `{`, or `}`, found `minecraft`
[INFO] [stdout]  --> /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 5 |     AcaciaButton
[INFO] [stdout]   |                 -
[INFO] [stdout]   |                 |
[INFO] [stdout]   |                 expected one of `(`, `,`, `=`, `{`, or `}`
[INFO] [stdout]   |                 help: missing `,`
[INFO] [stdout] 6 | minecraft:acaciaDoor
[INFO] [stdout]   | ^^^^^^^^^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `(`, `,`, `=`, `{`, or `}`, found `:`
[INFO] [stdout]  --> /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | minecraft:acaciaDoor
[INFO] [stdout]   |          ^ expected one of `(`, `,`, `=`, `{`, or `}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected item, found `:`
[INFO] [stdout]  --> /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | minecraft:acaciaDoor
[INFO] [stdout]   |          ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] thread 'rustc' panicked at 'Stack should be empty: final_buf=FrameData { open: /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:4:16: 4:17 (#0), open_delim: Brace, inner: [(Token(Token { kind: Ident("AcaciaButton", false), span: /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:5:5: 5:17 (#0) }), Alone), (Token(Token { kind: Ident("minecraft", false), span: /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:6:1: 6:10 (#0) }), Joint)] } stack=[FrameData { open: src/lib.rs:1:1: 1:1 (#0), open_delim: NoDelim, inner: [(Token(Token { kind: Ident("pub", false), span: /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:4:1: 4:4 (#0) }), Alone), (Token(Token { kind: Ident("enum", false), span: /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:4:5: 4:9 (#0) }), Alone), (Token(Token { kind: Ident("Block", false), span: /opt/rustwide/target/debug/build/copper-3bd87a9b37a2fd4c/out/blocks.rs:4:10: 4:15 (#0) }), Alone)] }]', compiler/rustc_parse/src/parser/attr_wrapper.rs:507:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x7f14c1aa04c0 - std[77c0456e0eb29f0c]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]    1:     0x7f14c1aa04c0 - std[77c0456e0eb29f0c]::backtrace_rs::backtrace::trace_unsynchronized::<std[77c0456e0eb29f0c]::sys_common::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]    2:     0x7f14c1aa04c0 - std[77c0456e0eb29f0c]::sys_common::backtrace::_print_fmt
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]    3:     0x7f14c1aa04c0 - <std[77c0456e0eb29f0c]::sys_common::backtrace::_print::DisplayBacktrace as core[ee1ca6415511a9c4]::fmt::Display>::fmt
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]    4:     0x7f14c1b0de9c - core[ee1ca6415511a9c4]::fmt::write
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/core/src/fmt/mod.rs:1110:17
[INFO] [stderr]    5:     0x7f14c1a91e15 - <std[77c0456e0eb29f0c]::sys::unix::stdio::Stderr as std[77c0456e0eb29f0c]::io::Write>::write_fmt
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/io/mod.rs:1584:15
[INFO] [stderr]    6:     0x7f14c1aa420b - std[77c0456e0eb29f0c]::sys_common::backtrace::_print
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]    7:     0x7f14c1aa420b - std[77c0456e0eb29f0c]::sys_common::backtrace::print
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]    8:     0x7f14c1aa420b - std[77c0456e0eb29f0c]::panicking::default_hook::{closure#1}
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/panicking.rs:208:50
[INFO] [stderr]    9:     0x7f14c1aa3ce1 - std[77c0456e0eb29f0c]::panicking::default_hook
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/panicking.rs:225:9
[INFO] [stderr]   10:     0x7f14c2259afd - rustc_driver[483abbcf9e72e7cf]::report_ice
[INFO] [stderr]   11:     0x7f14c1aa4a16 - std[77c0456e0eb29f0c]::panicking::rust_panic_with_hook
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/panicking.rs:626:17
[INFO] [stderr]   12:     0x7f14c1aa44f7 - std[77c0456e0eb29f0c]::panicking::begin_panic_handler::{closure#0}
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/panicking.rs:519:13
[INFO] [stderr]   13:     0x7f14c1aa09bc - std[77c0456e0eb29f0c]::sys_common::backtrace::__rust_end_short_backtrace::<std[77c0456e0eb29f0c]::panicking::begin_panic_handler::{closure#0}, !>
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]   14:     0x7f14c1aa4459 - rust_begin_unwind
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/panicking.rs:515:5
[INFO] [stderr]   15:     0x7f14c1a6d4eb - std[77c0456e0eb29f0c]::panicking::begin_panic_fmt
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/panicking.rs:457:5
[INFO] [stderr]   16:     0x7f14c3b27819 - <rustc_parse[58a0bff0c70882c2]::parser::attr_wrapper::LazyTokenStreamImpl as rustc_ast[ca28dc0398b38057]::tokenstream::CreateTokenStream>::create_token_stream
[INFO] [stderr]   17:     0x7f14c46ce3f9 - <&mut <rustc_ast[ca28dc0398b38057]::tokenstream::AttrAnnotatedTokenStream>::to_tokenstream::{closure#0} as core[ee1ca6415511a9c4]::ops::function::FnOnce<(&(rustc_ast[ca28dc0398b38057]::tokenstream::AttrAnnotatedTokenTree, rustc_ast[ca28dc0398b38057]::tokenstream::Spacing),)>>::call_once
[INFO] [stderr]   18:     0x7f14c3d26d53 - <core[ee1ca6415511a9c4]::iter::adapters::flatten::FlatMap<core[ee1ca6415511a9c4]::slice::iter::Iter<(rustc_ast[ca28dc0398b38057]::tokenstream::AttrAnnotatedTokenTree, rustc_ast[ca28dc0398b38057]::tokenstream::Spacing)>, smallvec[974fbe28010c9783]::IntoIter<[(rustc_ast[ca28dc0398b38057]::tokenstream::TokenTree, rustc_ast[ca28dc0398b38057]::tokenstream::Spacing); 1: usize]>, <rustc_ast[ca28dc0398b38057]::tokenstream::AttrAnnotatedTokenStream>::to_tokenstream::{closure#0}> as core[ee1ca6415511a9c4]::iter::traits::iterator::Iterator>::next
[INFO] [stderr]   19:     0x7f14c3d26287 - <alloc[cda43b294bbfc5d0]::vec::Vec<(rustc_ast[ca28dc0398b38057]::tokenstream::TokenTree, rustc_ast[ca28dc0398b38057]::tokenstream::Spacing)> as alloc[cda43b294bbfc5d0]::vec::spec_from_iter::SpecFromIter<(rustc_ast[ca28dc0398b38057]::tokenstream::TokenTree, rustc_ast[ca28dc0398b38057]::tokenstream::Spacing), core[ee1ca6415511a9c4]::iter::adapters::flatten::FlatMap<core[ee1ca6415511a9c4]::slice::iter::Iter<(rustc_ast[ca28dc0398b38057]::tokenstream::AttrAnnotatedTokenTree, rustc_ast[ca28dc0398b38057]::tokenstream::Spacing)>, smallvec[974fbe28010c9783]::IntoIter<[(rustc_ast[ca28dc0398b38057]::tokenstream::TokenTree, rustc_ast[ca28dc0398b38057]::tokenstream::Spacing); 1: usize]>, <rustc_ast[ca28dc0398b38057]::tokenstream::AttrAnnotatedTokenStream>::to_tokenstream::{closure#0}>>>::from_iter
[INFO] [stderr]   20:     0x7f14c46cf048 - <rustc_ast[ca28dc0398b38057]::tokenstream::AttrAnnotatedTokenStream>::to_tokenstream
[INFO] [stderr]   21:     0x7f14c44c4ca0 - rustc_parse[58a0bff0c70882c2]::prepend_attrs
[INFO] [stderr]   22:     0x7f14c44c4314 - rustc_parse[58a0bff0c70882c2]::nt_to_tokenstream
[INFO] [stderr]   23:     0x7f14c44470ec - <rustc_expand[de3753c9d71a1867]::proc_macro::ProcMacroDerive as rustc_expand[de3753c9d71a1867]::base::MultiItemModifier>::expand
[INFO] [stderr]   24:     0x7f14c3a2f6b3 - <rustc_expand[de3753c9d71a1867]::expand::MacroExpander>::fully_expand_fragment
[INFO] [stderr]   25:     0x7f14c444284b - <rustc_expand[de3753c9d71a1867]::expand::MacroExpander>::expand_crate
[INFO] [stderr]   26:     0x7f14c3d853b2 - <rustc_session[68cfb9ecbcb0204]::session::Session>::time::<core[ee1ca6415511a9c4]::result::Result<rustc_ast[ca28dc0398b38057]::ast::Crate, rustc_errors[a6601eba5631ab8e]::ErrorReported>, rustc_interface[2a693571f116958c]::passes::configure_and_expand_inner::{closure#1}>
[INFO] [stderr]   27:     0x7f14c3d7fd1d - rustc_interface[2a693571f116958c]::passes::configure_and_expand_inner
[INFO] [stderr]   28:     0x7f14c3d7d64f - rustc_interface[2a693571f116958c]::passes::configure_and_expand::{closure#0}
[INFO] [stderr]   29:     0x7f14c3d79db9 - <rustc_data_structures[52e6d6087bd5b52c]::box_region::PinnedGenerator<core[ee1ca6415511a9c4]::result::Result<rustc_ast[ca28dc0398b38057]::ast::Crate, rustc_errors[a6601eba5631ab8e]::ErrorReported>, for<'a, 'b> fn((&'a mut rustc_resolve[7beac6e9f86000ef]::Resolver<'b>,)), rustc_middle[4cd8eb4e66530e50]::ty::ResolverOutputs>>::new::<rustc_interface[2a693571f116958c]::passes::configure_and_expand::{closure#0}>
[INFO] [stderr]   30:     0x7f14c3d7f1d1 - rustc_interface[2a693571f116958c]::passes::configure_and_expand
[INFO] [stderr]   31:     0x7f14c3d8b452 - <rustc_interface[2a693571f116958c]::queries::Queries>::expansion
[INFO] [stderr]   32:     0x7f14c3d52310 - <rustc_interface[2a693571f116958c]::interface::Compiler>::enter::<rustc_driver[483abbcf9e72e7cf]::run_compiler::{closure#1}::{closure#2}, core[ee1ca6415511a9c4]::result::Result<core[ee1ca6415511a9c4]::option::Option<rustc_interface[2a693571f116958c]::queries::Linker>, rustc_errors[a6601eba5631ab8e]::ErrorReported>>
[INFO] [stderr]   33:     0x7f14c3d4f56c - rustc_span[41f5d8395d191526]::with_source_map::<core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>, rustc_interface[2a693571f116958c]::interface::create_compiler_and_run<core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>, rustc_driver[483abbcf9e72e7cf]::run_compiler::{closure#1}>::{closure#0}>
[INFO] [stderr]   34:     0x7f14c3d533c8 - <scoped_tls[b98c73e0611f21d3]::ScopedKey<rustc_span[41f5d8395d191526]::SessionGlobals>>::set::<rustc_interface[2a693571f116958c]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[2a693571f116958c]::interface::run_compiler<core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>, rustc_driver[483abbcf9e72e7cf]::run_compiler::{closure#1}>::{closure#0}, core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>>::{closure#0}::{closure#0}, core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>>
[INFO] [stderr]   35:     0x7f14c3d76eab - std[77c0456e0eb29f0c]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[2a693571f116958c]::util::scoped_thread<rustc_interface[2a693571f116958c]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[2a693571f116958c]::interface::run_compiler<core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>, rustc_driver[483abbcf9e72e7cf]::run_compiler::{closure#1}>::{closure#0}, core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>>::{closure#0}, core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>>::{closure#0}, ()>
[INFO] [stderr]   36:     0x7f14c3d4df35 - <<std[77c0456e0eb29f0c]::thread::Builder>::spawn_unchecked<rustc_interface[2a693571f116958c]::util::scoped_thread<rustc_interface[2a693571f116958c]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[2a693571f116958c]::interface::run_compiler<core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>, rustc_driver[483abbcf9e72e7cf]::run_compiler::{closure#1}>::{closure#0}, core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>>::{closure#0}, core[ee1ca6415511a9c4]::result::Result<(), rustc_errors[a6601eba5631ab8e]::ErrorReported>>::{closure#0}, ()>::{closure#0} as core[ee1ca6415511a9c4]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stderr]   37:     0x7f14c1ab0f47 - <alloc[cda43b294bbfc5d0]::boxed::Box<dyn core[ee1ca6415511a9c4]::ops::function::FnOnce<(), Output = ()>> as core[ee1ca6415511a9c4]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/alloc/src/boxed.rs:1575:9
[INFO] [stderr]   38:     0x7f14c1ab0f47 - <alloc[cda43b294bbfc5d0]::boxed::Box<alloc[cda43b294bbfc5d0]::boxed::Box<dyn core[ee1ca6415511a9c4]::ops::function::FnOnce<(), Output = ()>>> as core[ee1ca6415511a9c4]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/alloc/src/boxed.rs:1575:9
[INFO] [stderr]   39:     0x7f14c1ab0f47 - <std[77c0456e0eb29f0c]::sys::unix::thread::Thread>::new::thread_start
[INFO] [stderr]                                at /rustc/ce59db7a1b1b012fb2793c4641c1bdecad7a128b/library/std/src/sys/unix/thread.rs:71:17
[INFO] [stderr]   40:     0x7f14c19d1609 - start_thread
[INFO] [stderr]   41:     0x7f14c18e5293 - clone
[INFO] [stderr]   42:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] error: internal compiler error: unexpected panic
[INFO] [stderr] 
[INFO] [stderr] note: the compiler unexpectedly panicked. this is a bug.
[INFO] [stderr] 
[INFO] [stderr] 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
[INFO] [stderr] 
[INFO] [stderr] note: rustc 1.54.0-nightly (ce59db7a1 2021-05-20) running on x86_64-unknown-linux-gnu
[INFO] [stderr] 
[INFO] [stderr] note: compiler flags: -C embed-bitcode=no -C debuginfo=2 --crate-type lib
[INFO] [stderr] 
[INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
[INFO] [stderr] 
[INFO] [stderr] query stack during panic:
[INFO] [stderr] end of query stack
[INFO] [stdout] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `copper`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "7b78caea04e5b4bcf960e2882ef01fd9bfefd6accf4c137cfa8da125a024ae26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b78caea04e5b4bcf960e2882ef01fd9bfefd6accf4c137cfa8da125a024ae26", kill_on_drop: false }`
[INFO] [stdout] 7b78caea04e5b4bcf960e2882ef01fd9bfefd6accf4c137cfa8da125a024ae26