[INFO] cloning repository https://github.com/christalberg/random_matrix_generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/christalberg/random_matrix_generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristalberg%2Frandom_matrix_generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristalberg%2Frandom_matrix_generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 07120ee1530fc2314a4002f2e0e7f64fb367820b
[INFO] testing christalberg/random_matrix_generator against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristalberg%2Frandom_matrix_generator" "/workspace/builds/worker-45/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-45/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/christalberg/random_matrix_generator on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/christalberg/random_matrix_generator
[INFO] finished tweaking git repo https://github.com/christalberg/random_matrix_generator
[INFO] tweaked toml for git repo https://github.com/christalberg/random_matrix_generator written to /workspace/builds/worker-45/source/Cargo.toml
[INFO] crate git repo https://github.com/christalberg/random_matrix_generator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0160d97201d596cdadd84c401be61dea2c9d94a070136f7acc2f4496e65fbc58
[INFO] running `Command { std: "docker" "start" "-a" "0160d97201d596cdadd84c401be61dea2c9d94a070136f7acc2f4496e65fbc58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0160d97201d596cdadd84c401be61dea2c9d94a070136f7acc2f4496e65fbc58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0160d97201d596cdadd84c401be61dea2c9d94a070136f7acc2f4496e65fbc58", kill_on_drop: false }`
[INFO] [stdout] 0160d97201d596cdadd84c401be61dea2c9d94a070136f7acc2f4496e65fbc58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f840ebdf1bde2ede85716859aee4f1a7be3ff512e53eaec0d6a7ad7649fd310a
[INFO] running `Command { std: "docker" "start" "-a" "f840ebdf1bde2ede85716859aee4f1a7be3ff512e53eaec0d6a7ad7649fd310a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling random_matrix_generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `num` is never read
[INFO] [stdout]   --> src/main.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 |                     let mut num = String::new();
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.02s
[INFO] running `Command { std: "docker" "inspect" "f840ebdf1bde2ede85716859aee4f1a7be3ff512e53eaec0d6a7ad7649fd310a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f840ebdf1bde2ede85716859aee4f1a7be3ff512e53eaec0d6a7ad7649fd310a", kill_on_drop: false }`
[INFO] [stdout] f840ebdf1bde2ede85716859aee4f1a7be3ff512e53eaec0d6a7ad7649fd310a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73ceda78b1c92544b9fe1fca294a7491def777c63440db72848df9e023455ef6
[INFO] running `Command { std: "docker" "start" "-a" "73ceda78b1c92544b9fe1fca294a7491def777c63440db72848df9e023455ef6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling random_matrix_generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `num` is never read
[INFO] [stdout]   --> src/main.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 |                     let mut num = String::new();
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.51s
[INFO] running `Command { std: "docker" "inspect" "73ceda78b1c92544b9fe1fca294a7491def777c63440db72848df9e023455ef6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73ceda78b1c92544b9fe1fca294a7491def777c63440db72848df9e023455ef6", kill_on_drop: false }`
[INFO] [stdout] 73ceda78b1c92544b9fe1fca294a7491def777c63440db72848df9e023455ef6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a0457df1ff122b647d259318e706afdbe5cdb1e60c138a73e836538882e1957e
[INFO] running `Command { std: "docker" "start" "-a" "a0457df1ff122b647d259318e706afdbe5cdb1e60c138a73e836538882e1957e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: value assigned to `num` is never read
[INFO] [stderr]   --> src/main.rs:29:29
[INFO] [stderr]    |
[INFO] [stderr] 29 |                     let mut num = String::new();
[INFO] [stderr]    |                             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `random_matrix_generator` (bin "random_matrix_generator" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.56s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/random_matrix_generator-41832bcac53ca818)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a0457df1ff122b647d259318e706afdbe5cdb1e60c138a73e836538882e1957e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0457df1ff122b647d259318e706afdbe5cdb1e60c138a73e836538882e1957e", kill_on_drop: false }`
[INFO] [stdout] a0457df1ff122b647d259318e706afdbe5cdb1e60c138a73e836538882e1957e