[INFO] cloning repository https://github.com/qingshen0802/Guessing_Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qingshen0802/Guessing_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqingshen0802%2FGuessing_Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqingshen0802%2FGuessing_Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c4233628ef375bf238b3349a3ea0d2f054285817
[INFO] testing qingshen0802/Guessing_Rust against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqingshen0802%2FGuessing_Rust" "/workspace/builds/worker-84/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-84/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qingshen0802/Guessing_Rust on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/qingshen0802/Guessing_Rust
[INFO] finished tweaking git repo https://github.com/qingshen0802/Guessing_Rust
[INFO] tweaked toml for git repo https://github.com/qingshen0802/Guessing_Rust written to /workspace/builds/worker-84/source/Cargo.toml
[INFO] crate git repo https://github.com/qingshen0802/Guessing_Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8f34956f3807c1ddf526ebab318e3bea0adf50c7462b3ad33382f55f2aff362
[INFO] running `Command { std: "docker" "start" "-a" "c8f34956f3807c1ddf526ebab318e3bea0adf50c7462b3ad33382f55f2aff362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8f34956f3807c1ddf526ebab318e3bea0adf50c7462b3ad33382f55f2aff362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8f34956f3807c1ddf526ebab318e3bea0adf50c7462b3ad33382f55f2aff362", kill_on_drop: false }`
[INFO] [stdout] c8f34956f3807c1ddf526ebab318e3bea0adf50c7462b3ad33382f55f2aff362
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e859e93d5fe50c3c628da742ab64acdb041bdc4f6f474210f8c0bd401f272b13
[INFO] running `Command { std: "docker" "start" "-a" "e859e93d5fe50c3c628da742ab64acdb041bdc4f6f474210f8c0bd401f272b13", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling guessing v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]   --> src/main.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let mut i: u32 = 0;
[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: function is never used: `guessing`
[INFO] [stdout]   --> src/main.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn guessing() {
[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 27.09s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e859e93d5fe50c3c628da742ab64acdb041bdc4f6f474210f8c0bd401f272b13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e859e93d5fe50c3c628da742ab64acdb041bdc4f6f474210f8c0bd401f272b13", kill_on_drop: false }`
[INFO] [stdout] e859e93d5fe50c3c628da742ab64acdb041bdc4f6f474210f8c0bd401f272b13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2771cbece8841dfa3324deb0e55bf78d055bc248b4cbcb7fde27d6ec204a505c
[INFO] running `Command { std: "docker" "start" "-a" "2771cbece8841dfa3324deb0e55bf78d055bc248b4cbcb7fde27d6ec204a505c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling guessing v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]   --> src/main.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let mut i: u32 = 0;
[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: function is never used: `guessing`
[INFO] [stdout]   --> src/main.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn guessing() {
[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 1.01s
[INFO] running `Command { std: "docker" "inspect" "2771cbece8841dfa3324deb0e55bf78d055bc248b4cbcb7fde27d6ec204a505c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2771cbece8841dfa3324deb0e55bf78d055bc248b4cbcb7fde27d6ec204a505c", kill_on_drop: false }`
[INFO] [stdout] 2771cbece8841dfa3324deb0e55bf78d055bc248b4cbcb7fde27d6ec204a505c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 461097b29e8f7890e60d66785757c7977137900c02fc1d70d1ad9ff689bd000d
[INFO] running `Command { std: "docker" "start" "-a" "461097b29e8f7890e60d66785757c7977137900c02fc1d70d1ad9ff689bd000d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: value assigned to `i` is never read
[INFO] [stderr]   --> src/main.rs:23:17
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut i: u32 = 0;
[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: function is never used: `guessing`
[INFO] [stderr]   --> src/main.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn guessing() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `guessing` (bin "guessing" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.99s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/guessing-967b84ee3d5ada70)
[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" "461097b29e8f7890e60d66785757c7977137900c02fc1d70d1ad9ff689bd000d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "461097b29e8f7890e60d66785757c7977137900c02fc1d70d1ad9ff689bd000d", kill_on_drop: false }`
[INFO] [stdout] 461097b29e8f7890e60d66785757c7977137900c02fc1d70d1ad9ff689bd000d