[INFO] cloning repository https://github.com/jswrenn/midiplex
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jswrenn/midiplex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjswrenn%2Fmidiplex", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjswrenn%2Fmidiplex'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ce9f509489dc620a778cc74f0a87f00b64aee7f6
[INFO] testing jswrenn/midiplex against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjswrenn%2Fmidiplex" "/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/jswrenn/midiplex on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jswrenn/midiplex
[INFO] finished tweaking git repo https://github.com/jswrenn/midiplex
[INFO] tweaked toml for git repo https://github.com/jswrenn/midiplex written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jswrenn/midiplex already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v0.3.6
[INFO] [stderr]   Downloaded alsa v0.2.0
[INFO] [stderr]   Downloaded quote v0.5.1
[INFO] [stderr]   Downloaded indexmap v1.0.1
[INFO] [stderr]   Downloaded clap v2.31.2
[INFO] [stderr]   Downloaded atty v0.2.8
[INFO] [stderr]   Downloaded structopt v0.2.7
[INFO] [stderr]   Downloaded nix v0.9.0
[INFO] [stderr]   Downloaded libc v0.2.40
[INFO] [stderr]   Downloaded alsa-sys v0.1.1
[INFO] [stderr]   Downloaded structopt-derive v0.2.7
[INFO] [stderr]   Downloaded syn v0.13.1
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27aeb54bc0ab34fb9a1c74e3ca4c7ba132df4af02c69727765df4b8df280efa7
[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" "27aeb54bc0ab34fb9a1c74e3ca4c7ba132df4af02c69727765df4b8df280efa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27aeb54bc0ab34fb9a1c74e3ca4c7ba132df4af02c69727765df4b8df280efa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27aeb54bc0ab34fb9a1c74e3ca4c7ba132df4af02c69727765df4b8df280efa7", kill_on_drop: false }`
[INFO] [stdout] 27aeb54bc0ab34fb9a1c74e3ca4c7ba132df4af02c69727765df4b8df280efa7
[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=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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96bc1b6187c68b402326af69d002eb4e0d14d372c2559c409b0014a6e08632c7
[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" "96bc1b6187c68b402326af69d002eb4e0d14d372c2559c409b0014a6e08632c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling vec_map v0.8.0
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling bitflags v1.0.1
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v0.3.6
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling alsa-sys v0.1.1
[INFO] [stderr]    Compiling quote v0.5.1
[INFO] [stderr]    Compiling atty v0.2.8
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling structopt-derive v0.2.7
[INFO] [stderr]    Compiling alsa v0.2.0
[INFO] [stderr]    Compiling structopt v0.2.7
[INFO] [stderr]    Compiling midiplex v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `alloc_system`
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | extern crate alloc_system;
[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 `midiplex` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "96bc1b6187c68b402326af69d002eb4e0d14d372c2559c409b0014a6e08632c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96bc1b6187c68b402326af69d002eb4e0d14d372c2559c409b0014a6e08632c7", kill_on_drop: false }`
[INFO] [stdout] 96bc1b6187c68b402326af69d002eb4e0d14d372c2559c409b0014a6e08632c7