[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] testing staszewski/teaching-material-assignments against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstaszewski%2Fteaching-material-assignments" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/staszewski/teaching-material-assignments on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", 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-3/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" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 69893c804f4f6a7427571c09346eb8a4687e054bb2fcef6f9b4eb703a3718c34
[INFO] running `Command { std: "docker" "start" "-a" "69893c804f4f6a7427571c09346eb8a4687e054bb2fcef6f9b4eb703a3718c34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69893c804f4f6a7427571c09346eb8a4687e054bb2fcef6f9b4eb703a3718c34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69893c804f4f6a7427571c09346eb8a4687e054bb2fcef6f9b4eb703a3718c34", kill_on_drop: false }`
[INFO] [stdout] 69893c804f4f6a7427571c09346eb8a4687e054bb2fcef6f9b4eb703a3718c34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 45f984d5b84711d9f1f4da304cd1df59fff3b373e9547f5d2e56c278b23007f3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "45f984d5b84711d9f1f4da304cd1df59fff3b373e9547f5d2e56c278b23007f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "45f984d5b84711d9f1f4da304cd1df59fff3b373e9547f5d2e56c278b23007f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45f984d5b84711d9f1f4da304cd1df59fff3b373e9547f5d2e56c278b23007f3", kill_on_drop: false }`
[INFO] [stdout] 45f984d5b84711d9f1f4da304cd1df59fff3b373e9547f5d2e56c278b23007f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 125f4a0b54d66601a2aa99b099b6d6468f04c1caff9862bd7a29eeecaf9d1c02
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "125f4a0b54d66601a2aa99b099b6d6468f04c1caff9862bd7a29eeecaf9d1c02", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 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] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `Command { std: "docker" "inspect" "125f4a0b54d66601a2aa99b099b6d6468f04c1caff9862bd7a29eeecaf9d1c02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "125f4a0b54d66601a2aa99b099b6d6468f04c1caff9862bd7a29eeecaf9d1c02", kill_on_drop: false }`
[INFO] [stdout] 125f4a0b54d66601a2aa99b099b6d6468f04c1caff9862bd7a29eeecaf9d1c02
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a917cee360f62e24213089e2202e05780452ce5797b6918dd6135beff5ce1f7f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a917cee360f62e24213089e2202e05780452ce5797b6918dd6135beff5ce1f7f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test fizz_buzz::tests::test_buzz ... ok
[INFO] [stdout] test fizz_buzz::tests::test_fizzbuzz ... ok
[INFO] [stdout] test fizz_buzz::tests::test_non_fizz_buzz_value ... ok
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/io.rs:10:13
[INFO] [stderr]    |
[INFO] [stderr] 10 |         Err(e) => None,
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `io`
[INFO] [stderr]   --> src/io.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn io() {
[INFO] [stderr]    |    ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hello_world-da5dce9455b87d17
[INFO] [stdout] test io::tests::no_url ... ok
[INFO] [stdout] test fizz_buzz::tests::test_fizz ... ok
[INFO] [stdout] test io::tests::parse_correctly ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a917cee360f62e24213089e2202e05780452ce5797b6918dd6135beff5ce1f7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a917cee360f62e24213089e2202e05780452ce5797b6918dd6135beff5ce1f7f", kill_on_drop: false }`
[INFO] [stdout] a917cee360f62e24213089e2202e05780452ce5797b6918dd6135beff5ce1f7f