[INFO] fetching crate idmap 0.2.19...
[INFO] testing idmap-0.2.19 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate idmap 0.2.19 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate idmap 0.2.19 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate idmap 0.2.19
[INFO] finished tweaking crates.io crate idmap 0.2.19
[INFO] tweaked toml for crates.io crate idmap 0.2.19 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fixedbitset v0.3.1
[INFO] [stderr]   Downloaded idmap-derive v0.1.2
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c08e029be2aa06fdada6b9b2afbf8109ddb55f12e7b620cfb8b27f428cd2aa2d
[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" "c08e029be2aa06fdada6b9b2afbf8109ddb55f12e7b620cfb8b27f428cd2aa2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c08e029be2aa06fdada6b9b2afbf8109ddb55f12e7b620cfb8b27f428cd2aa2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c08e029be2aa06fdada6b9b2afbf8109ddb55f12e7b620cfb8b27f428cd2aa2d", kill_on_drop: false }`
[INFO] [stdout] c08e029be2aa06fdada6b9b2afbf8109ddb55f12e7b620cfb8b27f428cd2aa2d
[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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2b1e06ce1b57359856b84e5b747c7bf846ed4d94bd802970fc5e271a92bb5f3b
[INFO] running `Command { std: "docker" "start" "-a" "2b1e06ce1b57359856b84e5b747c7bf846ed4d94bd802970fc5e271a92bb5f3b", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixedbitset v0.3.1
[INFO] [stderr]    Compiling idmap v0.2.19 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `Command { std: "docker" "inspect" "2b1e06ce1b57359856b84e5b747c7bf846ed4d94bd802970fc5e271a92bb5f3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b1e06ce1b57359856b84e5b747c7bf846ed4d94bd802970fc5e271a92bb5f3b", kill_on_drop: false }`
[INFO] [stdout] 2b1e06ce1b57359856b84e5b747c7bf846ed4d94bd802970fc5e271a92bb5f3b
[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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98514b375e70917151a010ea5330a3dde0a2d071f1cfc9a92919e267e055f3c9
[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" "98514b375e70917151a010ea5330a3dde0a2d071f1cfc9a92919e267e055f3c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling serde_test v1.0.118
[INFO] [stderr]    Compiling idmap-derive v0.1.2
[INFO] [stderr]    Compiling idmap v0.2.19 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `serde`
[INFO] [stdout]  --> tests/basic.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate serde;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `idmap`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0463]: can't find crate for `serde`
[INFO] [stdout]  --> tests/direct.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate serde;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `serde`
[INFO] [stdout]  --> tests/set.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate serde;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "98514b375e70917151a010ea5330a3dde0a2d071f1cfc9a92919e267e055f3c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98514b375e70917151a010ea5330a3dde0a2d071f1cfc9a92919e267e055f3c9", kill_on_drop: false }`
[INFO] [stdout] 98514b375e70917151a010ea5330a3dde0a2d071f1cfc9a92919e267e055f3c9