[INFO] updating cached repository modeverv/Rust2019 [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/modeverv/Rust2019 [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/modeverv/Rust2019" "work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/Rust2019"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/Rust2019'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/modeverv/Rust2019" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/modeverv/Rust2019"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/modeverv/Rust2019'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] b3b7168d3df254b8c9695e73c6d68531f123921d [INFO] sha for GitHub repo modeverv/Rust2019: b3b7168d3df254b8c9695e73c6d68531f123921d [INFO] validating manifest of modeverv/Rust2019 on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of modeverv/Rust2019 on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing modeverv/Rust2019 [INFO] finished frobbing modeverv/Rust2019 [INFO] frobbed toml for modeverv/Rust2019 written to work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/Rust2019/Cargo.toml [INFO] started frobbing modeverv/Rust2019 [INFO] finished frobbing modeverv/Rust2019 [INFO] frobbed toml for modeverv/Rust2019 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/modeverv/Rust2019/Cargo.toml [INFO] crate modeverv/Rust2019 already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] testing modeverv/Rust2019 against 1.37.0 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/Rust2019:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"` [INFO] [stdout] 232a21d9702cc37347c3c6aa2f09ab6c4e22629aa4840bd25e2e932123649f02 [INFO] running `"docker" "start" "-a" "232a21d9702cc37347c3c6aa2f09ab6c4e22629aa4840bd25e2e932123649f02"` [INFO] [stderr] Compiling hello_world v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `xx` [INFO] [stderr] --> src/main.rs:6:10 [INFO] [stderr] | [INFO] [stderr] 6 | let (xx, y) = (1, 2); [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_xx` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `yy` [INFO] [stderr] --> src/main.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | let yy: i32 = 5; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_yy` [INFO] [stderr] [INFO] [stderr] warning: variable `yyy` is assigned to, but never used [INFO] [stderr] --> src/main.rs:9:13 [INFO] [stderr] | [INFO] [stderr] 9 | let mut yyy = 5; [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_yyy` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `yyy` is never read [INFO] [stderr] --> src/main.rs:10:5 [INFO] [stderr] | [INFO] [stderr] 10 | yyy = 10; [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: unused variable: `px` [INFO] [stderr] --> src/main.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let px = true; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_px` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `py` [INFO] [stderr] --> src/main.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let py:bool = false; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_py` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `pc` [INFO] [stderr] --> src/main.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let pc:char = 'x'; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_pc` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `middle` [INFO] [stderr] --> src/main.rs:41:9 [INFO] [stderr] | [INFO] [stderr] 41 | let middle = &pa[1..4]; // [1,2,3] [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_middle` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `ify` [INFO] [stderr] --> src/main.rs:52:9 [INFO] [stderr] | [INFO] [stderr] 52 | let ify = if x == 5 { [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_ify` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `ifyy` [INFO] [stderr] --> src/main.rs:57:9 [INFO] [stderr] | [INFO] [stderr] 57 | let ifyy = if x == 5 { 10 } else { 15 }; // y: i32 [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_ifyy` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:37:9 [INFO] [stderr] | [INFO] [stderr] 37 | let mut pa = [0, 1, 2, 3, 4]; [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 0.45s [INFO] running `"docker" "inspect" "232a21d9702cc37347c3c6aa2f09ab6c4e22629aa4840bd25e2e932123649f02"` [INFO] running `"docker" "rm" "-f" "232a21d9702cc37347c3c6aa2f09ab6c4e22629aa4840bd25e2e932123649f02"` [INFO] [stdout] 232a21d9702cc37347c3c6aa2f09ab6c4e22629aa4840bd25e2e932123649f02 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/Rust2019:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"` [INFO] [stdout] c961d7ed250284dfc5961e68063d7e6f8dc1f0ede3371f48882ef103ebdb1303 [INFO] running `"docker" "start" "-a" "c961d7ed250284dfc5961e68063d7e6f8dc1f0ede3371f48882ef103ebdb1303"` [INFO] [stderr] Compiling hello_world v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `xx` [INFO] [stderr] --> src/main.rs:6:10 [INFO] [stderr] | [INFO] [stderr] 6 | let (xx, y) = (1, 2); [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_xx` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `yy` [INFO] [stderr] --> src/main.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | let yy: i32 = 5; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_yy` [INFO] [stderr] [INFO] [stderr] warning: variable `yyy` is assigned to, but never used [INFO] [stderr] --> src/main.rs:9:13 [INFO] [stderr] | [INFO] [stderr] 9 | let mut yyy = 5; [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_yyy` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `yyy` is never read [INFO] [stderr] --> src/main.rs:10:5 [INFO] [stderr] | [INFO] [stderr] 10 | yyy = 10; [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: unused variable: `px` [INFO] [stderr] --> src/main.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let px = true; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_px` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `py` [INFO] [stderr] --> src/main.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let py:bool = false; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_py` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `pc` [INFO] [stderr] --> src/main.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let pc:char = 'x'; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_pc` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `middle` [INFO] [stderr] --> src/main.rs:41:9 [INFO] [stderr] | [INFO] [stderr] 41 | let middle = &pa[1..4]; // [1,2,3] [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_middle` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `ify` [INFO] [stderr] --> src/main.rs:52:9 [INFO] [stderr] | [INFO] [stderr] 52 | let ify = if x == 5 { [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_ify` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `ifyy` [INFO] [stderr] --> src/main.rs:57:9 [INFO] [stderr] | [INFO] [stderr] 57 | let ifyy = if x == 5 { 10 } else { 15 }; // y: i32 [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_ifyy` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:37:9 [INFO] [stderr] | [INFO] [stderr] 37 | let mut pa = [0, 1, 2, 3, 4]; [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 0.64s [INFO] running `"docker" "inspect" "c961d7ed250284dfc5961e68063d7e6f8dc1f0ede3371f48882ef103ebdb1303"` [INFO] running `"docker" "rm" "-f" "c961d7ed250284dfc5961e68063d7e6f8dc1f0ede3371f48882ef103ebdb1303"` [INFO] [stdout] c961d7ed250284dfc5961e68063d7e6f8dc1f0ede3371f48882ef103ebdb1303 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/Rust2019:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"` [INFO] [stdout] 23508415e874862a9b2ba95b192fd3f0b2e94e383a126f4ecba76c9499963fbf [INFO] running `"docker" "start" "-a" "23508415e874862a9b2ba95b192fd3f0b2e94e383a126f4ecba76c9499963fbf"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running /opt/crater/target/debug/deps/hello_world-f3509c269cd20c08 [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" "23508415e874862a9b2ba95b192fd3f0b2e94e383a126f4ecba76c9499963fbf"` [INFO] running `"docker" "rm" "-f" "23508415e874862a9b2ba95b192fd3f0b2e94e383a126f4ecba76c9499963fbf"` [INFO] [stdout] 23508415e874862a9b2ba95b192fd3f0b2e94e383a126f4ecba76c9499963fbf