[INFO] cloning repository https://github.com/brb/coolc-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brb/coolc-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrb%2Fcoolc-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrb%2Fcoolc-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b0819957478e39ece69cc82c68f298869cef9de4
[INFO] testing brb/coolc-rs against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrb%2Fcoolc-rs" "/workspace/builds/worker-54/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-54/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brb/coolc-rs on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/brb/coolc-rs
[INFO] finished tweaking git repo https://github.com/brb/coolc-rs
[INFO] tweaked toml for git repo https://github.com/brb/coolc-rs written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] crate git repo https://github.com/brb/coolc-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd801429dcb7af3cda216adad18d12fbaf01205aa5e61ba2b8cb6f62dffb7488
[INFO] running `Command { std: "docker" "start" "-a" "dd801429dcb7af3cda216adad18d12fbaf01205aa5e61ba2b8cb6f62dffb7488", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd801429dcb7af3cda216adad18d12fbaf01205aa5e61ba2b8cb6f62dffb7488", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd801429dcb7af3cda216adad18d12fbaf01205aa5e61ba2b8cb6f62dffb7488", kill_on_drop: false }`
[INFO] [stdout] dd801429dcb7af3cda216adad18d12fbaf01205aa5e61ba2b8cb6f62dffb7488
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9981e44abf5bbf82d31a0898b4c94e801caab53a8c82ea946e60a0f4afac9785
[INFO] running `Command { std: "docker" "start" "-a" "9981e44abf5bbf82d31a0898b4c94e801caab53a8c82ea946e60a0f4afac9785", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling coolc-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::io::Chars`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Chars;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^ no `Chars` in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/main.rs:116:20
[INFO] [stdout]     |
[INFO] [stdout] 116 |         while self.is_digit() {
[INFO] [stdout]     |                    ^^^^^^^^ cannot infer type for type parameter `T`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/main.rs:125:20
[INFO] [stdout]     |
[INFO] [stdout] 125 |         while self.is_digit() || self.is_letter() {
[INFO] [stdout]     |                    ^^^^^^^^ cannot infer type for type parameter `T`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/main.rs:186:26
[INFO] [stdout]     |
[INFO] [stdout] 186 |             else if self.is_eof() {
[INFO] [stdout]     |                          ^^^^^^ cannot infer type for type parameter `T`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/main.rs:202:26
[INFO] [stdout]     |
[INFO] [stdout] 202 |             else if self.is_eof() {
[INFO] [stdout]     |                          ^^^^^^ cannot infer type for type parameter `T`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/main.rs:219:17
[INFO] [stdout]     |
[INFO] [stdout] 219 |         if self.is_digit() {
[INFO] [stdout]     |                 ^^^^^^^^ cannot infer type for type parameter `T`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `chars` found for struct `File` in the current scope
[INFO] [stdout]    --> src/main.rs:295:41
[INFO] [stdout]     |
[INFO] [stdout] 295 |     let mut scanner = Scanner::new(file.chars());
[INFO] [stdout]     |                                         ^^^^^ method not found in `File`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0432, E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `coolc-rs` due to 9 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "9981e44abf5bbf82d31a0898b4c94e801caab53a8c82ea946e60a0f4afac9785", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9981e44abf5bbf82d31a0898b4c94e801caab53a8c82ea946e60a0f4afac9785", kill_on_drop: false }`
[INFO] [stdout] 9981e44abf5bbf82d31a0898b4c94e801caab53a8c82ea946e60a0f4afac9785
