[INFO] cloning repository https://github.com/Grissess/rtt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Grissess/rtt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrissess%2Frtt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrissess%2Frtt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8efe8d227b26634179654a854463f7c7bb4c5991
[INFO] testing Grissess/rtt against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrissess%2Frtt" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Grissess/rtt on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Grissess/rtt
[INFO] finished tweaking git repo https://github.com/Grissess/rtt
[INFO] tweaked toml for git repo https://github.com/Grissess/rtt written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/Grissess/rtt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee0247405957dec66a94a0b7405ac0a6615651d7b67e01d7acaca287cb80cc8c
[INFO] running `Command { std: "docker" "start" "-a" "ee0247405957dec66a94a0b7405ac0a6615651d7b67e01d7acaca287cb80cc8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee0247405957dec66a94a0b7405ac0a6615651d7b67e01d7acaca287cb80cc8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee0247405957dec66a94a0b7405ac0a6615651d7b67e01d7acaca287cb80cc8c", kill_on_drop: false }`
[INFO] [stdout] ee0247405957dec66a94a0b7405ac0a6615651d7b67e01d7acaca287cb80cc8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53eb0661f87bd6109bef216e34da75925eab10c8747f9ddbf456ed99a8dfe4b0
[INFO] running `Command { std: "docker" "start" "-a" "53eb0661f87bd6109bef216e34da75925eab10c8747f9ddbf456ed99a8dfe4b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.8
[INFO] [stderr]    Compiling rand v0.3.14
[INFO] [stderr]    Compiling hamt v0.1.0 (https://github.com/michaelwoerister/rs-persistent-datastructures.git#67971136)
[INFO] [stderr]    Compiling rtt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/ctok.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `chars` found for struct `Stdin` in the current scope
[INFO] [stdout]   --> src/main.rs:17:52
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut tree = to_tree(Tokenizer::new(io::stdin().chars().map(|r| r.unwrap())), &mut ns);
[INFO] [stdout]    |                                                       ^^^^^ method not found in `Stdin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rtt`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "53eb0661f87bd6109bef216e34da75925eab10c8747f9ddbf456ed99a8dfe4b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53eb0661f87bd6109bef216e34da75925eab10c8747f9ddbf456ed99a8dfe4b0", kill_on_drop: false }`
[INFO] [stdout] 53eb0661f87bd6109bef216e34da75925eab10c8747f9ddbf456ed99a8dfe4b0