[INFO] cloning repository https://github.com/crippa1337/lin-alg
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crippa1337/lin-alg" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrippa1337%2Flin-alg", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrippa1337%2Flin-alg'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 662ba9f37f13f5cb85b822e4da7ec486cb111006
[INFO] testing crippa1337/lin-alg against master#595316b4006932405a63862d8fe65f71a6356293 for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrippa1337%2Flin-alg" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crippa1337/lin-alg on toolchain 595316b4006932405a63862d8fe65f71a6356293
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+595316b4006932405a63862d8fe65f71a6356293" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/crippa1337/lin-alg
[INFO] finished tweaking git repo https://github.com/crippa1337/lin-alg
[INFO] tweaked toml for git repo https://github.com/crippa1337/lin-alg written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/crippa1337/lin-alg already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+595316b4006932405a63862d8fe65f71a6356293" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] testing crippa1337/lin-alg against try#5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrippa1337%2Flin-alg" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crippa1337/lin-alg on toolchain 5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/crippa1337/lin-alg
[INFO] finished tweaking git repo https://github.com/crippa1337/lin-alg
[INFO] tweaked toml for git repo https://github.com/crippa1337/lin-alg written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/crippa1337/lin-alg already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 21e8f835d917690aa85f1f60be4b94a8219f54c1ab4e85fce4504b810f8c7533
[INFO] running `Command { std: "docker" "start" "-a" "21e8f835d917690aa85f1f60be4b94a8219f54c1ab4e85fce4504b810f8c7533", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21e8f835d917690aa85f1f60be4b94a8219f54c1ab4e85fce4504b810f8c7533", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21e8f835d917690aa85f1f60be4b94a8219f54c1ab4e85fce4504b810f8c7533", kill_on_drop: false }`
[INFO] [stdout] 21e8f835d917690aa85f1f60be4b94a8219f54c1ab4e85fce4504b810f8c7533
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93543937ba873c9a6a743827a08d66433364f642ac01fc16ce27d816c9103ae3
[INFO] running `Command { std: "docker" "start" "-a" "93543937ba873c9a6a743827a08d66433364f642ac01fc16ce27d816c9103ae3", kill_on_drop: false }`
[INFO] [stderr]    Compiling lin-alg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: the method `to_string` exists for reference `&Value`, but its trait bounds were not satisfied
[INFO] [stdout]   --> src/main.rs:49:24
[INFO] [stdout]    |
[INFO] [stdout] 9  | enum Value {
[INFO] [stdout]    | ---------- doesn't satisfy `Value: ToString` or `Value: std::fmt::Display`
[INFO] [stdout] ...
[INFO] [stdout] 49 |             str.push(i.to_string().chars().next().unwrap());
[INFO] [stdout]    |                        ^^^^^^^^^ method cannot be called on `&Value` due to unsatisfied trait bounds
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `Value: std::fmt::Display`
[INFO] [stdout]            which is required by `Value: ToString`
[INFO] [stdout]            `&Value: std::fmt::Display`
[INFO] [stdout]            which is required by `&Value: ToString`
[INFO] [stdout] note: the trait `std::fmt::Display` must be implemented
[INFO] [stdout]   --> /rustc/5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b/library/core/src/fmt/mod.rs:724:1
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `to_string`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `ToString`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lin-alg` (bin "lin-alg") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "93543937ba873c9a6a743827a08d66433364f642ac01fc16ce27d816c9103ae3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93543937ba873c9a6a743827a08d66433364f642ac01fc16ce27d816c9103ae3", kill_on_drop: false }`
[INFO] [stdout] 93543937ba873c9a6a743827a08d66433364f642ac01fc16ce27d816c9103ae3