[INFO] cloning repository https://github.com/erik-helmers/Rost
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/erik-helmers/Rost" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik-helmers%2FRost", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik-helmers%2FRost'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc0805537784c53b3a1af500ce7a12deb49f7de3
[INFO] testing erik-helmers/Rost against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik-helmers%2FRost" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/erik-helmers/Rost 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 git repo https://github.com/erik-helmers/Rost
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/erik-helmers/Rost
[INFO] tweaked toml for git repo https://github.com/erik-helmers/Rost written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/erik-helmers/Rost already has a lockfile, it will not be regenerated
[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 pic8259_simple v0.2.0
[INFO] [stderr]   Downloaded volatile v0.3.0
[INFO] [stderr]   Downloaded spinning_top v0.1.1
[INFO] [stderr]   Downloaded conquer-util v0.2.0
[INFO] [stderr]   Downloaded pc-keyboard v0.5.1
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] [stderr]   Downloaded cpuio v0.3.0
[INFO] [stderr]   Downloaded conquer-once v0.2.1
[INFO] [stderr]   Downloaded uart_16550 v0.2.7
[INFO] [stderr]   Downloaded x86_64 v0.11.8
[INFO] [stderr]   Downloaded bootloader v0.9.8
[INFO] [stderr]   Downloaded linked_list_allocator v0.8.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 38ae1a889609836e07bbdec4d02b817edd7da440ed8b6e15df42a0779bd146da
[INFO] running `Command { std: "docker" "start" "-a" "38ae1a889609836e07bbdec4d02b817edd7da440ed8b6e15df42a0779bd146da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38ae1a889609836e07bbdec4d02b817edd7da440ed8b6e15df42a0779bd146da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38ae1a889609836e07bbdec4d02b817edd7da440ed8b6e15df42a0779bd146da", kill_on_drop: false }`
[INFO] [stdout] 38ae1a889609836e07bbdec4d02b817edd7da440ed8b6e15df42a0779bd146da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stdout] 0673d6e345537b3949619622834182d7de042bd4865ebea235cda6e582b48a2f
[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" "0673d6e345537b3949619622834182d7de042bd4865ebea235cda6e582b48a2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling x86_64 v0.11.8
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling bootloader v0.9.8
[INFO] [stderr]    Compiling cpuio v0.3.0
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stdout] error[E0463]: can't find crate for `core`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the `x86_64-rost-5607470741273118178` target may not be installed
[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 `cpuio`
[INFO] [stderr] 
[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 `core`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the `x86_64-rost-5607470741273118178` target may not be installed
[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 `core`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the `x86_64-rost-5607470741273118178` target may not be installed
[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 `core`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the `x86_64-rost-5607470741273118178` target may not be installed
[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 `core`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the `x86_64-rost-5607470741273118178` target may not be installed
[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" "0673d6e345537b3949619622834182d7de042bd4865ebea235cda6e582b48a2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0673d6e345537b3949619622834182d7de042bd4865ebea235cda6e582b48a2f", kill_on_drop: false }`
[INFO] [stdout] 0673d6e345537b3949619622834182d7de042bd4865ebea235cda6e582b48a2f