[INFO] cloning repository https://github.com/robdaemon/rusty-plaid
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/robdaemon/rusty-plaid" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobdaemon%2Frusty-plaid", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobdaemon%2Frusty-plaid'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f16912a93899b532a169e22fea0bcdc58a22c267
[INFO] checking robdaemon/rusty-plaid against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobdaemon%2Frusty-plaid" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/robdaemon/rusty-plaid on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking git repo https://github.com/robdaemon/rusty-plaid
[INFO] finished tweaking git repo https://github.com/robdaemon/rusty-plaid
[INFO] tweaked toml for git repo https://github.com/robdaemon/rusty-plaid written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/robdaemon/rusty-plaid already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: path `/workspace/builds/worker-6/source/src/PlaidOS.rs` was erroneously implicitly accepted for library `PlaidOS`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 107b1a143b38e49b68f09a1ecb810269abca23292886174e0f4fefce9783de34
[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" "107b1a143b38e49b68f09a1ecb810269abca23292886174e0f4fefce9783de34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "107b1a143b38e49b68f09a1ecb810269abca23292886174e0f4fefce9783de34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "107b1a143b38e49b68f09a1ecb810269abca23292886174e0f4fefce9783de34", kill_on_drop: false }`
[INFO] [stdout] 107b1a143b38e49b68f09a1ecb810269abca23292886174e0f4fefce9783de34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed81de2b576a5e58131fe236f8b1b013ff38ea7158206165821bfa8371af1300
[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" "ed81de2b576a5e58131fe236f8b1b013ff38ea7158206165821bfa8371af1300", kill_on_drop: false }`
[INFO] [stderr] warning: path `/opt/rustwide/workdir/src/PlaidOS.rs` was erroneously implicitly accepted for library `PlaidOS`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] [stderr]    Compiling rust-libcore v0.0.3
[INFO] [stderr] error: failed to run custom build command for `rust-libcore v0.0.3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/rust-libcore-1abc21596ead0305/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Box<Any>', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-libcore-0.0.3/./build.rs:43:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5601a42b75c0 - std::backtrace_rs::backtrace::libunwind::trace::he85dfb3ae4206056
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x5601a42b75c0 - std::backtrace_rs::backtrace::trace_unsynchronized::h1ad28094d7b00c21
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x5601a42b75c0 - std::sys_common::backtrace::_print_fmt::h901b54610713cd21
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x5601a42b75c0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb0ad78ee1571f7e0
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x5601a42d534c - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x5601a42b4b52 - std::io::Write::write_fmt::hf7b7d7b243f84a36
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/io/mod.rs:1516
[INFO] [stderr]      6:     0x5601a42b9bcd - std::sys_common::backtrace::_print::hd093978a5287b8ff
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x5601a42b9bcd - std::sys_common::backtrace::print::h20f46787581d56d7
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x5601a42b9bcd - std::panicking::default_hook::{{closure}}::h486cbb4b82ffc357
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x5601a42b9878 - std::panicking::default_hook::h4190c9e3edd4d591
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x5601a42ba251 - std::panicking::rust_panic_with_hook::h72e78719cdda225c
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x5601a42a08d2 - std::panicking::begin_panic::{{closure}}::hbc3502980e270a22
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:506
[INFO] [stderr]     12:     0x5601a429e6d8 - std::sys_common::backtrace::__rust_end_short_backtrace::h2b542fe0f7b9bdf3
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x5601a42a069b - std::panicking::begin_panic::h9a591ec8a8856524
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:505
[INFO] [stderr]     14:     0x5601a42978fd - build_script_build::main::ha8636882dc09bede
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-libcore-0.0.3/./build.rs:43
[INFO] [stderr]     15:     0x5601a429889b - core::ops::function::FnOnce::call_once::h94e57ba6a92ac6c4
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/ops/function.rs:227
[INFO] [stderr]     16:     0x5601a429e75e - std::sys_common::backtrace::__rust_begin_short_backtrace::h417fe24595c65afb
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     17:     0x5601a429efe1 - std::rt::lang_start::{{closure}}::hbcacd6976852feb3
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/rt.rs:66
[INFO] [stderr]     18:     0x5601a42ba677 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h5e15f43ce28787f7
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/core/src/ops/function.rs:259
[INFO] [stderr]     19:     0x5601a42ba677 - std::panicking::try::do_call::h764f1891769113e9
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:381
[INFO] [stderr]     20:     0x5601a42ba677 - std::panicking::try::h0f2fe4fdd5e0ad19
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panicking.rs:345
[INFO] [stderr]     21:     0x5601a42ba677 - std::panic::catch_unwind::h1634e40dd3a19f80
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/panic.rs:382
[INFO] [stderr]     22:     0x5601a42ba677 - std::rt::lang_start_internal::h8d4bc7b854bbd5fe
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/rt.rs:51
[INFO] [stderr]     23:     0x5601a429efb7 - std::rt::lang_start::h3a12d96986ffdc08
[INFO] [stderr]                                  at /rustc/0d37dca25a51fb900a402c94c8818ad1c2789e30/library/std/src/rt.rs:65
[INFO] [stderr]     24:     0x5601a4297efa - main
[INFO] [stderr]     25:     0x7f09c0b250b3 - __libc_start_main
[INFO] [stderr]     26:     0x5601a42940be - _start
[INFO] [stderr]     27:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "ed81de2b576a5e58131fe236f8b1b013ff38ea7158206165821bfa8371af1300", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed81de2b576a5e58131fe236f8b1b013ff38ea7158206165821bfa8371af1300", kill_on_drop: false }`
[INFO] [stdout] ed81de2b576a5e58131fe236f8b1b013ff38ea7158206165821bfa8371af1300