[INFO] fetching crate idmap 0.2.21...
[INFO] testing idmap-0.2.21 against 1.55.0 for beta-1.56-1
[INFO] extracting crate idmap 0.2.21 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate idmap 0.2.21 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate idmap 0.2.21
[INFO] finished tweaking crates.io crate idmap 0.2.21
[INFO] tweaked toml for crates.io crate idmap 0.2.21 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7dcb9782cffd8fa9533c66c5fc00ba33a214b21a55ad037af4326eec953f2ff6
[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" "7dcb9782cffd8fa9533c66c5fc00ba33a214b21a55ad037af4326eec953f2ff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7dcb9782cffd8fa9533c66c5fc00ba33a214b21a55ad037af4326eec953f2ff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dcb9782cffd8fa9533c66c5fc00ba33a214b21a55ad037af4326eec953f2ff6", kill_on_drop: false }`
[INFO] [stdout] 7dcb9782cffd8fa9533c66c5fc00ba33a214b21a55ad037af4326eec953f2ff6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] e3d0d232a54bb12b9371800038c7e0d5bf8ac738e68aaf1ccc35853ab6b9efbf
[INFO] running `Command { std: "docker" "start" "-a" "e3d0d232a54bb12b9371800038c7e0d5bf8ac738e68aaf1ccc35853ab6b9efbf", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixedbitset v0.4.0
[INFO] [stderr]    Compiling idmap v0.2.21 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.63s
[INFO] running `Command { std: "docker" "inspect" "e3d0d232a54bb12b9371800038c7e0d5bf8ac738e68aaf1ccc35853ab6b9efbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3d0d232a54bb12b9371800038c7e0d5bf8ac738e68aaf1ccc35853ab6b9efbf", kill_on_drop: false }`
[INFO] [stdout] e3d0d232a54bb12b9371800038c7e0d5bf8ac738e68aaf1ccc35853ab6b9efbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--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] f281f13f7b30cffc8652203134c0912da2a90490c9c147059f0ff21685c5b898
[INFO] running `Command { std: "docker" "start" "-a" "f281f13f7b30cffc8652203134c0912da2a90490c9c147059f0ff21685c5b898", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_test v1.0.130
[INFO] [stderr]    Compiling idmap-derive v0.1.2
[INFO] [stderr]    Compiling idmap v0.2.21 (/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] [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: could not compile `idmap` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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] [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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f281f13f7b30cffc8652203134c0912da2a90490c9c147059f0ff21685c5b898", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f281f13f7b30cffc8652203134c0912da2a90490c9c147059f0ff21685c5b898", kill_on_drop: false }`
[INFO] [stdout] f281f13f7b30cffc8652203134c0912da2a90490c9c147059f0ff21685c5b898