[INFO] fetching crate accord 0.2.2...
[INFO] checking accord-0.2.2 against master#80399064afa4a2cd153f30d02c25f7ea0383ed65 for opaque-soundness-fix
[INFO] extracting crate accord 0.2.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate accord 0.2.2 on toolchain 80399064afa4a2cd153f30d02c25f7ea0383ed65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate accord 0.2.2
[INFO] finished tweaking crates.io crate accord 0.2.2
[INFO] tweaked toml for crates.io crate accord 0.2.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded itoa v0.1.1
[INFO] [stderr]   Downloaded dtoa v0.2.2
[INFO] [stderr]   Downloaded serde_json v0.8.6
[INFO] [stderr]   Downloaded serde v0.8.23
[INFO] [stderr]   Downloaded serde_codegen_internals v0.10.0
[INFO] [stderr]   Downloaded syntex v0.45.1
[INFO] [stderr]   Downloaded unicode-xid v0.0.3
[INFO] [stderr]   Downloaded syntex_pos v0.45.0
[INFO] [stderr]   Downloaded serde_codegen v0.8.14
[INFO] [stderr]   Downloaded log v0.3.9
[INFO] [stderr]   Downloaded syntex_errors v0.45.0
[INFO] [stderr]   Downloaded rustc-serialize v0.3.25
[INFO] [stderr]   Downloaded syn v0.9.2
[INFO] [stderr]   Downloaded syntex_syntax v0.45.1
[INFO] [stderr]   Downloaded term v0.4.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c7e2c2db2ecffefdb81071d87fdf9d5b95805934debe31d6009f072da6fa2a5
[INFO] running `Command { std: "docker" "start" "-a" "7c7e2c2db2ecffefdb81071d87fdf9d5b95805934debe31d6009f072da6fa2a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c7e2c2db2ecffefdb81071d87fdf9d5b95805934debe31d6009f072da6fa2a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c7e2c2db2ecffefdb81071d87fdf9d5b95805934debe31d6009f072da6fa2a5", kill_on_drop: false }`
[INFO] [stdout] 7c7e2c2db2ecffefdb81071d87fdf9d5b95805934debe31d6009f072da6fa2a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2cc68bfc351897d96fa14d077767da871f2491a6fbaef68ffa5d1c058ed33554
[INFO] running `Command { std: "docker" "start" "-a" "2cc68bfc351897d96fa14d077767da871f2491a6fbaef68ffa5d1c058ed33554", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling log v0.4.21
[INFO] [stderr]    Compiling rustc-serialize v0.3.25
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]    Compiling syn v0.9.2
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling serde_codegen_internals v0.10.0
[INFO] [stderr]    Compiling syntex_pos v0.45.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling syntex_errors v0.45.0
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]    Compiling syntex_syntax v0.45.1
[INFO] [stderr]    Compiling syntex v0.45.1
[INFO] [stderr]    Compiling serde_codegen v0.8.14
[INFO] [stderr]    Compiling accord v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `accord v0.2.2 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/accord-24498e5605ab0536/build-script-build` (signal: 6, SIGABRT: process abort signal)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread '<unnamed>' panicked at library/core/src/panicking.rs:156:5:
[INFO] [stderr]   slice::get_unchecked requires that the index is within the slice
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55b1b33d92b4 - std::backtrace_rs::backtrace::libunwind::trace::h3da9427eac6b2713
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stderr]      1:     0x55b1b33d92b4 - std::backtrace_rs::backtrace::trace_unsynchronized::h8b6ad79cb60b1f10
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55b1b33d92b4 - std::sys_common::backtrace::_print_fmt::h0332dac066d13bb4
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stderr]      3:     0x55b1b33d92b4 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::ha53f24802e841e78
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x55b1b33f92fc - core::fmt::rt::Argument::fmt::hb7cd99f2796dbda9
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/core/src/fmt/rt.rs:142:9
[INFO] [stderr]      5:     0x55b1b33f92fc - core::fmt::write_internal::hd9480cc81e0db946
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/core/src/fmt/mod.rs:1143:17
[INFO] [stderr]      6:     0x55b1b33d7037 - core::fmt::write::hc9b13aa14bb399e7
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/core/src/fmt/mod.rs:1125:67
[INFO] [stderr]      7:     0x55b1b33d7037 - std::io::Write::write_fmt::h7f190ab8bb73d292
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/io/mod.rs:1846:15
[INFO] [stderr]      8:     0x55b1b33d9064 - std::sys_common::backtrace::_print::h4dfa85ce29f289cd
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      9:     0x55b1b33d9064 - std::sys_common::backtrace::print::h075bb0820ca1af60
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]     10:     0x55b1b33da58b - std::panicking::default_hook::{{closure}}::h2868146f5a47a8b0
[INFO] [stderr]     11:     0x55b1b33da2e7 - std::panicking::default_hook::h75759d10d3c62529
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/panicking.rs:292:9
[INFO] [stderr]     12:     0x55b1b33daa5d - std::panicking::rust_panic_with_hook::h96d9580203cd93f6
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/panicking.rs:779:13
[INFO] [stderr]     13:     0x55b1b33da8f9 - std::panicking::begin_panic_handler::{{closure}}::h99fe5817649d74e2
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/panicking.rs:649:13
[INFO] [stderr]     14:     0x55b1b33d9786 - std::sys_common::backtrace::__rust_end_short_backtrace::hec38ffed74bfdff4
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stderr]     15:     0x55b1b33da634 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/panicking.rs:645:5
[INFO] [stderr]     16:     0x55b1b303b13a - core::panicking::panic_nounwind_fmt::runtime::h8bdb92ae885ba216
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/core/src/panicking.rs:110:18
[INFO] [stderr]     17:     0x55b1b303b13a - core::panicking::panic_nounwind_fmt::h7c139496a3cd4277
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/core/src/panicking.rs:123:9
[INFO] [stderr]     18:     0x55b1b303b1e9 - core::panicking::panic_nounwind::hf994d979ffa6c00f
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/core/src/panicking.rs:156:5
[INFO] [stderr]     19:     0x55b1b3227b66 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::h38e79a61e9db2170
[INFO] [stderr]     20:     0x55b1b32998e5 - core::slice::<impl [T]>::get_unchecked::hd03ee16357404a6a
[INFO] [stderr]     21:     0x55b1b311c855 - <alloc::vec::Vec<T> as syntex_syntax::util::move_map::MoveMap<T>>::move_flat_map::hd3ef120bb7170727
[INFO] [stderr]     22:     0x55b1b312c2d5 - syntex_syntax::fold::fold_attrs::h051f3e7b7c8fcc94
[INFO] [stderr]     23:     0x55b1b31625e3 - syntex_syntax::fold::noop_fold_item_simple::hbc727cc709722426
[INFO] [stderr]     24:     0x55b1b32a7b5f - syntex_syntax::fold::Folder::fold_item_simple::h6dd39d5119aec8bc
[INFO] [stderr]     25:     0x55b1b31610bf - syntex_syntax::fold::noop_fold_item::{{closure}}::hbfb4ad130c32cf17
[INFO] [stderr]     26:     0x55b1b3253278 - syntex_syntax::ptr::P<T>::map::hf944a638f7c1773a
[INFO] [stderr]     27:     0x55b1b3160f23 - syntex_syntax::fold::noop_fold_item::h6b16378c6d58858a
[INFO] [stderr]     28:     0x55b1b32b8a42 - <syntex_syntax::ext::decorator::MacroExpander as syntex_syntax::fold::Folder>::fold_item::{{closure}}::h26af51095fd9b21e
[INFO] [stderr]     29:     0x55b1b3299534 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &mut F>::call_once::hd2b11bdc9b3b43c4
[INFO] [stderr]     30:     0x55b1b3213880 - <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::next::h194e5ab5c29acea3
[INFO] [stderr]     31:     0x55b1b320049c - core::ops::function::FnOnce::call_once::h2d46905473e5516d
[INFO] [stderr]     32:     0x55b1b32d0784 - core::iter::adapters::fuse::and_then_or_clear::hb18c00fdbd673436
[INFO] [stderr]     33:     0x55b1b32cc6be - <core::iter::adapters::fuse::Fuse<I> as core::iter::adapters::fuse::FuseImpl<I>>::next::h4bce5d8f609cb03f
[INFO] [stderr]     34:     0x55b1b31fddce - <core::iter::adapters::flatten::FlattenCompat<I,U> as core::iter::traits::iterator::Iterator>::next::h88d8cb0e456199cb
[INFO] [stderr]     35:     0x55b1b31fcbb7 - <core::iter::adapters::flatten::FlatMap<I,U,F> as core::iter::traits::iterator::Iterator>::next::ha31e8405385cdc1b
[INFO] [stderr]     36:     0x55b1b327b25f - <syntex_syntax::util::small_vector::SmallVector<T> as core::iter::traits::collect::Extend<T>>::extend::h4f23bf00a78867e0
[INFO] [stderr]     37:     0x55b1b3278dfd - <syntex_syntax::util::small_vector::SmallVector<T> as core::iter::traits::collect::FromIterator<T>>::from_iter::h1e81f54d8dddc7ab
[INFO] [stderr]     38:     0x55b1b320f25e - core::iter::traits::iterator::Iterator::collect::hced3cd9c30f6fe80
[INFO] [stderr]     39:     0x55b1b32b89de - <syntex_syntax::ext::decorator::MacroExpander as syntex_syntax::fold::Folder>::fold_item::h96f4fe560a27c6a3
[INFO] [stderr]     40:     0x55b1b31605f6 - syntex_syntax::fold::noop_fold_crate::h2be074c5585ca4b7
[INFO] [stderr]     41:     0x55b1b32a798f - syntex_syntax::fold::Folder::fold_crate::h80ca9c3977c6a543
[INFO] [stderr]     42:     0x55b1b32b893c - syntex_syntax::ext::decorator::expand_attributes::h7c37dedfd1fc6ead
[INFO] [stderr]     43:     0x55b1b3282c5a - syntex_syntax::ext::expand::MacroExpander::expand_crate::hcf1620a3da3a362f
[INFO] [stderr]     44:     0x55b1b30b4a03 - syntex::registry::Registry::expand_crate::h57cd2642bec6c803
[INFO] [stderr]     45:     0x55b1b303e638 - syntex::registry::Registry::expand::h43e155c3c6f62a48
[INFO] [stderr]     46:     0x55b1b303bb1e - serde_codegen::expand::{{closure}}::h326a2e310726e32c
[INFO] [stderr]     47:     0x55b1b303bb96 - std::sys_common::backtrace::__rust_begin_short_backtrace::he0fcae5cd4663f79
[INFO] [stderr]     48:     0x55b1b303cf65 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h7e409f52e94e3ba1
[INFO] [stderr]     49:     0x55b1b303b8f8 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h1706b1c7d1516310
[INFO] [stderr]     50:     0x55b1b303d0a4 - std::panicking::try::do_call::ha206db331ad6ac09
[INFO] [stderr]     51:     0x55b1b303f08b - __rust_try
[INFO] [stderr]     52:     0x55b1b303cfb8 - std::panicking::try::h4fa7a291ec9f5bc8
[INFO] [stderr]     53:     0x55b1b303cde0 - std::thread::Builder::spawn_unchecked_::{{closure}}::h7ffbe672bc06c0d3
[INFO] [stderr]     54:     0x55b1b303d316 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h0fbd92dfdc5d63db
[INFO] [stderr]     55:     0x55b1b33dcdd5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h2987df4bfa9b159e
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/alloc/src/boxed.rs:2016:9
[INFO] [stderr]     56:     0x55b1b33dcdd5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9c4b8a5558135e7e
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/alloc/src/boxed.rs:2016:9
[INFO] [stderr]     57:     0x55b1b33dcdd5 - std::sys::pal::unix::thread::Thread::new::thread_start::h94d91562ee098771
[INFO] [stderr]                                  at /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stderr]     58:     0x7f848afe4ac3 - <unknown>
[INFO] [stderr]     59:     0x7f848b075bf4 - __clone
[INFO] [stderr]     60:                0x0 - <unknown>
[INFO] [stderr]   thread caused non-unwinding panic. aborting.
[INFO] running `Command { std: "docker" "inspect" "2cc68bfc351897d96fa14d077767da871f2491a6fbaef68ffa5d1c058ed33554", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cc68bfc351897d96fa14d077767da871f2491a6fbaef68ffa5d1c058ed33554", kill_on_drop: false }`
[INFO] [stdout] 2cc68bfc351897d96fa14d077767da871f2491a6fbaef68ffa5d1c058ed33554
