[INFO] cloning repository https://github.com/s3bc40/rust-ownership [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/s3bc40/rust-ownership" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs3bc40%2Frust-ownership", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs3bc40%2Frust-ownership'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 9ee444bec71d1262370844e3d6952bbc5788d0e2 [INFO] checking s3bc40/rust-ownership/9ee444bec71d1262370844e3d6952bbc5788d0e2 against try#9228062c11d321a3ea08123f57e47533a3c88b00 for pr-154781 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs3bc40%2Frust-ownership" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/s3bc40/rust-ownership [INFO] finished tweaking git repo https://github.com/s3bc40/rust-ownership [INFO] tweaked toml for git repo https://github.com/s3bc40/rust-ownership written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/s3bc40/rust-ownership on toolchain 9228062c11d321a3ea08123f57e47533a3c88b00 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9228062c11d321a3ea08123f57e47533a3c88b00" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/s3bc40/rust-ownership 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" "+9228062c11d321a3ea08123f57e47533a3c88b00" "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 [ERROR] error running command: no output for 300 seconds [INFO] checking s3bc40/rust-ownership/9ee444bec71d1262370844e3d6952bbc5788d0e2 against try#9228062c11d321a3ea08123f57e47533a3c88b00 for pr-154781 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs3bc40%2Frust-ownership" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/s3bc40/rust-ownership [INFO] finished tweaking git repo https://github.com/s3bc40/rust-ownership [INFO] tweaked toml for git repo https://github.com/s3bc40/rust-ownership written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/s3bc40/rust-ownership on toolchain 9228062c11d321a3ea08123f57e47533a3c88b00 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9228062c11d321a3ea08123f57e47533a3c88b00" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/s3bc40/rust-ownership 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" "+9228062c11d321a3ea08123f57e47533a3c88b00" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+9228062c11d321a3ea08123f57e47533a3c88b00" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 4b14f4ebde052c85f2f7481888f049bf38c20bc42d6aa4b2ff835887e7b39e6b [INFO] running `Command { std: "docker" "start" "-a" "4b14f4ebde052c85f2f7481888f049bf38c20bc42d6aa4b2ff835887e7b39e6b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4b14f4ebde052c85f2f7481888f049bf38c20bc42d6aa4b2ff835887e7b39e6b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4b14f4ebde052c85f2f7481888f049bf38c20bc42d6aa4b2ff835887e7b39e6b", kill_on_drop: false }` [INFO] [stdout] 4b14f4ebde052c85f2f7481888f049bf38c20bc42d6aa4b2ff835887e7b39e6b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+9228062c11d321a3ea08123f57e47533a3c88b00" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ee5081a30581c94340c194e269263aa58e3e9dce04804bdc7abf1cfac41c7dab [INFO] running `Command { std: "docker" "start" "-a" "ee5081a30581c94340c194e269263aa58e3e9dce04804bdc7abf1cfac41c7dab", kill_on_drop: false }` [INFO] [stderr] Checking rust-ownership v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `core::slice` [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use core::slice; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `core::slice` [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use core::slice; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/main.rs:16:9 [INFO] [stdout] | [INFO] [stdout] 16 | let y = x; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/main.rs:71:13 [INFO] [stdout] | [INFO] [stdout] 71 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/main.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/main.rs:78:9 [INFO] [stdout] | [INFO] [stdout] 78 | let r1 = &s; // no problem [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/main.rs:79:9 [INFO] [stdout] | [INFO] [stdout] 79 | let r2 = &s; // no problem [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r3` [INFO] [stdout] --> src/main.rs:80:9 [INFO] [stdout] | [INFO] [stdout] 80 | let r3 = &mut s; // BIG PROBLEM [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_start` [INFO] [stdout] --> src/main.rs:107:9 [INFO] [stdout] | [INFO] [stdout] 107 | let slice_start = &s[..2]; //&s[0..2]; [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_start` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_end` [INFO] [stdout] --> src/main.rs:108:9 [INFO] [stdout] | [INFO] [stdout] 108 | let slice_end = &s[3..]; // &s[3..len]; [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_end` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_all` [INFO] [stdout] --> src/main.rs:109:9 [INFO] [stdout] | [INFO] [stdout] 109 | let slice_all = &s[..]; // &s[0..len]; [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_all` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:114:9 [INFO] [stdout] | [INFO] [stdout] 114 | let word = first_word(&my_string[0..6]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:115:9 [INFO] [stdout] | [INFO] [stdout] 115 | let word = first_word(&my_string[..]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:118:9 [INFO] [stdout] | [INFO] [stdout] 118 | let word = first_word(&my_string); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:123:9 [INFO] [stdout] | [INFO] [stdout] 123 | let word = first_word(&my_string_literal[0..6]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:124:9 [INFO] [stdout] | [INFO] [stdout] 124 | let word = first_word(&my_string_literal[..]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:128:9 [INFO] [stdout] | [INFO] [stdout] 128 | let word = first_word(my_string_literal); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `reassign` is never read [INFO] [stdout] --> src/main.rs:29:24 [INFO] [stdout] | [INFO] [stdout] 29 | let mut reassign = String::from("hello"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used [INFO] [stdout] 30 | reassign = String::from("ahoy"); [INFO] [stdout] | -------- `reassign` is overwritten here before the previous value is read [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/main.rs:16:9 [INFO] [stdout] | [INFO] [stdout] 16 | let y = x; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/main.rs:71:13 [INFO] [stdout] | [INFO] [stdout] 71 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/main.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/main.rs:78:9 [INFO] [stdout] | [INFO] [stdout] 78 | let r1 = &s; // no problem [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/main.rs:79:9 [INFO] [stdout] | [INFO] [stdout] 79 | let r2 = &s; // no problem [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r3` [INFO] [stdout] --> src/main.rs:80:9 [INFO] [stdout] | [INFO] [stdout] 80 | let r3 = &mut s; // BIG PROBLEM [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_start` [INFO] [stdout] --> src/main.rs:107:9 [INFO] [stdout] | [INFO] [stdout] 107 | let slice_start = &s[..2]; //&s[0..2]; [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_start` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_end` [INFO] [stdout] --> src/main.rs:108:9 [INFO] [stdout] | [INFO] [stdout] 108 | let slice_end = &s[3..]; // &s[3..len]; [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_end` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_all` [INFO] [stdout] --> src/main.rs:109:9 [INFO] [stdout] | [INFO] [stdout] 109 | let slice_all = &s[..]; // &s[0..len]; [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_all` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:114:9 [INFO] [stdout] | [INFO] [stdout] 114 | let word = first_word(&my_string[0..6]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:115:9 [INFO] [stdout] | [INFO] [stdout] 115 | let word = first_word(&my_string[..]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:118:9 [INFO] [stdout] | [INFO] [stdout] 118 | let word = first_word(&my_string); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:123:9 [INFO] [stdout] | [INFO] [stdout] 123 | let word = first_word(&my_string_literal[0..6]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:124:9 [INFO] [stdout] | [INFO] [stdout] 124 | let word = first_word(&my_string_literal[..]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:128:9 [INFO] [stdout] | [INFO] [stdout] 128 | let word = first_word(my_string_literal); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `reassign` is never read [INFO] [stdout] --> src/main.rs:29:24 [INFO] [stdout] | [INFO] [stdout] 29 | let mut reassign = String::from("hello"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used [INFO] [stdout] 30 | reassign = String::from("ahoy"); [INFO] [stdout] | -------- `reassign` is overwritten here before the previous value is read [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s [INFO] running `Command { std: "docker" "inspect" "ee5081a30581c94340c194e269263aa58e3e9dce04804bdc7abf1cfac41c7dab", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ee5081a30581c94340c194e269263aa58e3e9dce04804bdc7abf1cfac41c7dab", kill_on_drop: false }` [INFO] [stdout] ee5081a30581c94340c194e269263aa58e3e9dce04804bdc7abf1cfac41c7dab