[INFO] updating cached repository https://github.com/tperdue321/rust_ownership [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 66673718162c26f2488175f590ac5890d467a7e6 [INFO] testing tperdue321/rust_ownership against beta-2019-09-28 for beta-1.39-1 [INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftperdue321%2Frust_ownership" "work/builds/worker-5/source"` [INFO] [stderr] Cloning into 'work/builds/worker-5/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/tperdue321/rust_ownership on toolchain beta-2019-09-28 [INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/tperdue321/rust_ownership [INFO] finished tweaking git repo https://github.com/tperdue321/rust_ownership [INFO] tweaked toml for git repo https://github.com/tperdue321/rust_ownership written to work/builds/worker-5/source/Cargo.toml [INFO] crate git repo https://github.com/tperdue321/rust_ownership already has a lockfile, it will not be regenerated [INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"` [INFO] [stdout] 6e631ee166217a1beff61417974ed2a9e3f3625f93e9c824b06b08c27ccb986a [INFO] running `"docker" "start" "-a" "6e631ee166217a1beff61417974ed2a9e3f3625f93e9c824b06b08c27ccb986a"` [INFO] [stderr] Compiling ownership v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `string` [INFO] [stderr] --> src/main.rs:13:13 [INFO] [stderr] | [INFO] [stderr] 13 | let string = "hello"; // string is valid from here forward [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_string` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s2` [INFO] [stderr] --> src/main.rs:40:9 [INFO] [stderr] | [INFO] [stderr] 40 | let s2 = s1; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/main.rs:68:9 [INFO] [stderr] | [INFO] [stderr] 68 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:98:9 [INFO] [stderr] | [INFO] [stderr] 98 | let r1 = &mut s2; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r3` [INFO] [stderr] --> src/main.rs:107:13 [INFO] [stderr] | [INFO] [stderr] 107 | let r3 = &mut s3; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r4` [INFO] [stderr] --> src/main.rs:110:9 [INFO] [stderr] | [INFO] [stderr] 110 | let r4 = &mut s3; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r4` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:113:9 [INFO] [stderr] | [INFO] [stderr] 113 | let r1 = &s; // immutable ref [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r2` [INFO] [stderr] --> src/main.rs:114:9 [INFO] [stderr] | [INFO] [stderr] 114 | let r2 = &s; // second because as many refs can read the same data safely [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:140:9 [INFO] [stderr] | [INFO] [stderr] 140 | let slice = &s[0..2]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:141:9 [INFO] [stderr] | [INFO] [stderr] 141 | let slice = &s[..2]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:145:9 [INFO] [stderr] | [INFO] [stderr] 145 | let slice = &s[2..len]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:146:9 [INFO] [stderr] | [INFO] [stderr] 146 | let slice = &s[2..]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:148:9 [INFO] [stderr] | [INFO] [stderr] 148 | let slice = &s[0..len]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:149:9 [INFO] [stderr] | [INFO] [stderr] 149 | let slice = &s[..]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:166:9 [INFO] [stderr] | [INFO] [stderr] 166 | let slice = &a[0..2]; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:112:9 [INFO] [stderr] | [INFO] [stderr] 112 | let mut s = String::from("hello s"); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.32s [INFO] running `"docker" "inspect" "6e631ee166217a1beff61417974ed2a9e3f3625f93e9c824b06b08c27ccb986a"` [INFO] running `"docker" "rm" "-f" "6e631ee166217a1beff61417974ed2a9e3f3625f93e9c824b06b08c27ccb986a"` [INFO] [stdout] 6e631ee166217a1beff61417974ed2a9e3f3625f93e9c824b06b08c27ccb986a [INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"` [INFO] [stdout] 599b3c064c5bc34eb3eaacf73d408a1f114743af4bd1d3b99f9ac83072fcf3a7 [INFO] running `"docker" "start" "-a" "599b3c064c5bc34eb3eaacf73d408a1f114743af4bd1d3b99f9ac83072fcf3a7"` [INFO] [stderr] Compiling ownership v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `string` [INFO] [stderr] --> src/main.rs:13:13 [INFO] [stderr] | [INFO] [stderr] 13 | let string = "hello"; // string is valid from here forward [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_string` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s2` [INFO] [stderr] --> src/main.rs:40:9 [INFO] [stderr] | [INFO] [stderr] 40 | let s2 = s1; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/main.rs:68:9 [INFO] [stderr] | [INFO] [stderr] 68 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:98:9 [INFO] [stderr] | [INFO] [stderr] 98 | let r1 = &mut s2; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r3` [INFO] [stderr] --> src/main.rs:107:13 [INFO] [stderr] | [INFO] [stderr] 107 | let r3 = &mut s3; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r4` [INFO] [stderr] --> src/main.rs:110:9 [INFO] [stderr] | [INFO] [stderr] 110 | let r4 = &mut s3; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r4` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:113:9 [INFO] [stderr] | [INFO] [stderr] 113 | let r1 = &s; // immutable ref [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r2` [INFO] [stderr] --> src/main.rs:114:9 [INFO] [stderr] | [INFO] [stderr] 114 | let r2 = &s; // second because as many refs can read the same data safely [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:140:9 [INFO] [stderr] | [INFO] [stderr] 140 | let slice = &s[0..2]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:141:9 [INFO] [stderr] | [INFO] [stderr] 141 | let slice = &s[..2]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:145:9 [INFO] [stderr] | [INFO] [stderr] 145 | let slice = &s[2..len]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:146:9 [INFO] [stderr] | [INFO] [stderr] 146 | let slice = &s[2..]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:148:9 [INFO] [stderr] | [INFO] [stderr] 148 | let slice = &s[0..len]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:149:9 [INFO] [stderr] | [INFO] [stderr] 149 | let slice = &s[..]; // same [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice` [INFO] [stderr] --> src/main.rs:166:9 [INFO] [stderr] | [INFO] [stderr] 166 | let slice = &a[0..2]; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_slice` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:112:9 [INFO] [stderr] | [INFO] [stderr] 112 | let mut s = String::from("hello s"); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.32s [INFO] running `"docker" "inspect" "599b3c064c5bc34eb3eaacf73d408a1f114743af4bd1d3b99f9ac83072fcf3a7"` [INFO] running `"docker" "rm" "-f" "599b3c064c5bc34eb3eaacf73d408a1f114743af4bd1d3b99f9ac83072fcf3a7"` [INFO] [stdout] 599b3c064c5bc34eb3eaacf73d408a1f114743af4bd1d3b99f9ac83072fcf3a7 [INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"` [INFO] [stdout] abc01b8fd9cfb9ec3e5ef6ed69ea11784a05fde4a6d4cfd630880da0f7fae2b6 [INFO] running `"docker" "start" "-a" "abc01b8fd9cfb9ec3e5ef6ed69ea11784a05fde4a6d4cfd630880da0f7fae2b6"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.00s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/ownership-41ae254d3f983674 [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 [INFO] [stdout] [INFO] running `"docker" "inspect" "abc01b8fd9cfb9ec3e5ef6ed69ea11784a05fde4a6d4cfd630880da0f7fae2b6"` [INFO] running `"docker" "rm" "-f" "abc01b8fd9cfb9ec3e5ef6ed69ea11784a05fde4a6d4cfd630880da0f7fae2b6"` [INFO] [stdout] abc01b8fd9cfb9ec3e5ef6ed69ea11784a05fde4a6d4cfd630880da0f7fae2b6