[INFO] cloning repository https://github.com/kamek-pf/rcast
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kamek-pf/rcast" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamek-pf%2Frcast", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamek-pf%2Frcast'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 166e4a1516b8d901bd03413befa8c2fd5c55dd5a
[INFO] testing kamek-pf/rcast against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamek-pf%2Frcast" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kamek-pf/rcast 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 git repo https://github.com/kamek-pf/rcast
[INFO] finished tweaking git repo https://github.com/kamek-pf/rcast
[INFO] tweaked toml for git repo https://github.com/kamek-pf/rcast written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/kamek-pf/rcast already has a lockfile, it will not be regenerated
[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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.14
[INFO] [stderr]   Downloaded dns-parser v0.7.1
[INFO] [stderr]   Downloaded bitstream-io v0.6.5
[INFO] [stderr]   Downloaded matroska v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] f3ed23d933d239aa2598921b3a61f6019ad36311ede298fbb435825640ebd952
[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" "f3ed23d933d239aa2598921b3a61f6019ad36311ede298fbb435825640ebd952", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3ed23d933d239aa2598921b3a61f6019ad36311ede298fbb435825640ebd952", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3ed23d933d239aa2598921b3a61f6019ad36311ede298fbb435825640ebd952", kill_on_drop: false }`
[INFO] [stdout] f3ed23d933d239aa2598921b3a61f6019ad36311ede298fbb435825640ebd952
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 79622a311e3fb48f5f1d5b5686cfd17cbbf8a0c9c25143508da1f13b58d00954
[INFO] running `Command { std: "docker" "start" "-a" "79622a311e3fb48f5f1d5b5686cfd17cbbf8a0c9c25143508da1f13b58d00954", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.14
[INFO] [stderr]    Compiling rustc-demangle v0.1.7
[INFO] [stderr]    Compiling quick-error v1.2.1
[INFO] [stderr]    Compiling bitstream-io v0.6.5
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling dns-parser v0.7.1
[INFO] [stderr]    Compiling matroska v0.3.0
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling uuid v0.6.3
[INFO] [stderr]    Compiling backtrace v0.3.6
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling librcast v0.1.0 (/opt/rustwide/workdir/librcast)
[INFO] [stdout] error[E0463]: can't find crate for `matroska`
[INFO] [stdout]  --> librcast/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate matroska;
[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 `librcast` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "79622a311e3fb48f5f1d5b5686cfd17cbbf8a0c9c25143508da1f13b58d00954", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79622a311e3fb48f5f1d5b5686cfd17cbbf8a0c9c25143508da1f13b58d00954", kill_on_drop: false }`
[INFO] [stdout] 79622a311e3fb48f5f1d5b5686cfd17cbbf8a0c9c25143508da1f13b58d00954