[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 try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrissess%2Frtt" "/workspace/builds/worker-78/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-78/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Grissess/rtt 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/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-78/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" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/michaelwoerister/rs-persistent-datastructures.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] 6033505c9d2854c2e2965b5c59a8a8ca9740e9a1def2f81b06ec534346384b29
[INFO] running `Command { std: "docker" "start" "-a" "6033505c9d2854c2e2965b5c59a8a8ca9740e9a1def2f81b06ec534346384b29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6033505c9d2854c2e2965b5c59a8a8ca9740e9a1def2f81b06ec534346384b29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6033505c9d2854c2e2965b5c59a8a8ca9740e9a1def2f81b06ec534346384b29", kill_on_drop: false }`
[INFO] [stdout] 6033505c9d2854c2e2965b5c59a8a8ca9740e9a1def2f81b06ec534346384b29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] 84d3c19dd79cc2f6436b83a5cf4c53675244258ecf367d0ae36648c669211ccb
[INFO] running `Command { std: "docker" "start" "-a" "84d3c19dd79cc2f6436b83a5cf4c53675244258ecf367d0ae36648c669211ccb", 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` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "84d3c19dd79cc2f6436b83a5cf4c53675244258ecf367d0ae36648c669211ccb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84d3c19dd79cc2f6436b83a5cf4c53675244258ecf367d0ae36648c669211ccb", kill_on_drop: false }`
[INFO] [stdout] 84d3c19dd79cc2f6436b83a5cf4c53675244258ecf367d0ae36648c669211ccb