[INFO] cloning repository https://github.com/emeraldhycient/rust-learn1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emeraldhycient/rust-learn1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femeraldhycient%2Frust-learn1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femeraldhycient%2Frust-learn1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 85c29647ac470cd327c667f429ee6cdee91a1faa
[INFO] testing emeraldhycient/rust-learn1 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femeraldhycient%2Frust-learn1" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/emeraldhycient/rust-learn1
[INFO] finished tweaking git repo https://github.com/emeraldhycient/rust-learn1
[INFO] tweaked toml for git repo https://github.com/emeraldhycient/rust-learn1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/emeraldhycient/rust-learn1 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/emeraldhycient/rust-learn1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 862b7dca1a22b5663b2da2bd40832edae952d810a7cb7bf50e5fc76f707cee22
[INFO] running `Command { std: "docker" "start" "-a" "862b7dca1a22b5663b2da2bd40832edae952d810a7cb7bf50e5fc76f707cee22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "862b7dca1a22b5663b2da2bd40832edae952d810a7cb7bf50e5fc76f707cee22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "862b7dca1a22b5663b2da2bd40832edae952d810a7cb7bf50e5fc76f707cee22", kill_on_drop: false }`
[INFO] [stdout] 862b7dca1a22b5663b2da2bd40832edae952d810a7cb7bf50e5fc76f707cee22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 84ca4aed61b49e98bf6498ead87377289680428a50c812c9efa08aaf2fbe9070
[INFO] running `Command { std: "docker" "start" "-a" "84ca4aed61b49e98bf6498ead87377289680428a50c812c9efa08aaf2fbe9070", kill_on_drop: false }`
[INFO] [stderr]    Compiling first v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `mutable_string` is assigned to, but never used
[INFO] [stdout]   --> src/vars.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut mutable_string = "will be chnaged soon";
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_mutable_string` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable_string` is never read
[INFO] [stdout]   --> src/vars.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     mutable_string = "i have been changed";
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `floats`
[INFO] [stdout]   --> src/types.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let floats: f32 = 2.56;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_floats`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first1`
[INFO] [stdout]   --> src/vars.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let (first1, second1) = ("first", "second");
[INFO] [stdout]    |          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_first1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second1`
[INFO] [stdout]   --> src/vars.rs:24:18
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let (first1, second1) = ("first", "second");
[INFO] [stdout]    |                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `boolean`
[INFO] [stdout]   --> src/types.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let boolean: bool = true;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_boolean`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `characters`
[INFO] [stdout]   --> src/types.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let characters: char = 'c';
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_characters`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `integers`
[INFO] [stdout]   --> src/types.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let integers: i64 = 12345566;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integers`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_greater`
[INFO] [stdout]   --> src/types.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let is_greater = 34 > 4;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_greater`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "84ca4aed61b49e98bf6498ead87377289680428a50c812c9efa08aaf2fbe9070", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84ca4aed61b49e98bf6498ead87377289680428a50c812c9efa08aaf2fbe9070", kill_on_drop: false }`
[INFO] [stdout] 84ca4aed61b49e98bf6498ead87377289680428a50c812c9efa08aaf2fbe9070
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ce467f678bcaf8e3138da15fabce6f2bc1dc5a8cb86288f337342a08f50d1af
[INFO] running `Command { std: "docker" "start" "-a" "5ce467f678bcaf8e3138da15fabce6f2bc1dc5a8cb86288f337342a08f50d1af", kill_on_drop: false }`
[INFO] [stderr]    Compiling first v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `mutable_string` is assigned to, but never used
[INFO] [stdout]   --> src/vars.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut mutable_string = "will be chnaged soon";
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_mutable_string` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable_string` is never read
[INFO] [stdout]   --> src/vars.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     mutable_string = "i have been changed";
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `floats`
[INFO] [stdout]   --> src/types.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let floats: f32 = 2.56;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_floats`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `boolean`
[INFO] [stdout]   --> src/types.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let boolean: bool = true;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_boolean`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `characters`
[INFO] [stdout]   --> src/types.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let characters: char = 'c';
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_characters`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `integers`
[INFO] [stdout]   --> src/types.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let integers: i64 = 12345566;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integers`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_greater`
[INFO] [stdout]   --> src/types.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let is_greater = 34 > 4;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_greater`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first1`
[INFO] [stdout]   --> src/vars.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let (first1, second1) = ("first", "second");
[INFO] [stdout]    |          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_first1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second1`
[INFO] [stdout]   --> src/vars.rs:24:18
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let (first1, second1) = ("first", "second");
[INFO] [stdout]    |                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "5ce467f678bcaf8e3138da15fabce6f2bc1dc5a8cb86288f337342a08f50d1af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ce467f678bcaf8e3138da15fabce6f2bc1dc5a8cb86288f337342a08f50d1af", kill_on_drop: false }`
[INFO] [stdout] 5ce467f678bcaf8e3138da15fabce6f2bc1dc5a8cb86288f337342a08f50d1af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c375877d55daded8545f153ec6e6b2cc5e96b91c119524a360399a625115094b
[INFO] running `Command { std: "docker" "start" "-a" "c375877d55daded8545f153ec6e6b2cc5e96b91c119524a360399a625115094b", kill_on_drop: false }`
[INFO] [stderr] warning: variable `mutable_string` is assigned to, but never used
[INFO] [stderr]   --> src/vars.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut mutable_string = "will be chnaged soon";
[INFO] [stderr]    |             ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_mutable_string` instead
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable_string` is never read
[INFO] [stderr]   --> src/vars.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     mutable_string = "i have been changed";
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `floats`
[INFO] [stderr]   --> src/types.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let floats: f32 = 2.56;
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_floats`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `boolean`
[INFO] [stderr]   --> src/types.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let boolean: bool = true;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_boolean`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `characters`
[INFO] [stderr]   --> src/types.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let characters: char = 'c';
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_characters`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `integers`
[INFO] [stderr]   --> src/types.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let integers: i64 = 12345566;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integers`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `is_greater`
[INFO] [stderr]   --> src/types.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let is_greater = 34 > 4;
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_greater`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first1`
[INFO] [stderr]   --> src/vars.rs:24:10
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let (first1, second1) = ("first", "second");
[INFO] [stderr]    |          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_first1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `second1`
[INFO] [stderr]   --> src/vars.rs:24:18
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let (first1, second1) = ("first", "second");
[INFO] [stderr]    |                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second1`
[INFO] [stderr] 
[INFO] [stderr] warning: `first` (bin "first" test) generated 9 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/first-648675fac82a6192)
[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" "c375877d55daded8545f153ec6e6b2cc5e96b91c119524a360399a625115094b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c375877d55daded8545f153ec6e6b2cc5e96b91c119524a360399a625115094b", kill_on_drop: false }`
[INFO] [stdout] c375877d55daded8545f153ec6e6b2cc5e96b91c119524a360399a625115094b