[INFO] cloning repository https://github.com/staszewski/teaching-material-assignments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/staszewski/teaching-material-assignments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstaszewski%2Fteaching-material-assignments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstaszewski%2Fteaching-material-assignments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b10424f08d88aba455f69553493aa199fbd22693
[INFO] checking staszewski/teaching-material-assignments against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstaszewski%2Fteaching-material-assignments" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/staszewski/teaching-material-assignments on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/staszewski/teaching-material-assignments
[INFO] finished tweaking git repo https://github.com/staszewski/teaching-material-assignments
[INFO] tweaked toml for git repo https://github.com/staszewski/teaching-material-assignments written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/staszewski/teaching-material-assignments already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d43b02a6fbe73cec5388f06d0994bbbb028944d31fa27e846b586770a8b709f8
[INFO] running `Command { std: "docker" "start" "-a" "d43b02a6fbe73cec5388f06d0994bbbb028944d31fa27e846b586770a8b709f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d43b02a6fbe73cec5388f06d0994bbbb028944d31fa27e846b586770a8b709f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d43b02a6fbe73cec5388f06d0994bbbb028944d31fa27e846b586770a8b709f8", kill_on_drop: false }`
[INFO] [stdout] d43b02a6fbe73cec5388f06d0994bbbb028944d31fa27e846b586770a8b709f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f7b05ab9779eb214b2071f79eb90edef3600a7c7aacf728808a68c59872a8b9
[INFO] running `Command { std: "docker" "start" "-a" "0f7b05ab9779eb214b2071f79eb90edef3600a7c7aacf728808a68c59872a8b9", kill_on_drop: false }`
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/io.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         Err(e) => None,
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/io.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         Err(e) => None,
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fizz_buzz`
[INFO] [stdout]  --> src/fizz_buzz.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn fizz_buzz(i: i32) -> String {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_line`
[INFO] [stdout]  --> src/io.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn parse_line(line: String) -> Option<Url> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `io`
[INFO] [stdout]   --> src/io.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn io() {
[INFO] [stdout]    |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `io`
[INFO] [stdout]   --> src/io.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn io() {
[INFO] [stdout]    |    ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.24s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0f7b05ab9779eb214b2071f79eb90edef3600a7c7aacf728808a68c59872a8b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f7b05ab9779eb214b2071f79eb90edef3600a7c7aacf728808a68c59872a8b9", kill_on_drop: false }`
[INFO] [stdout] 0f7b05ab9779eb214b2071f79eb90edef3600a7c7aacf728808a68c59872a8b9