[INFO] updating cached repository aPere3/playgrust [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/aPere3/playgrust [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/aPere3/playgrust" "work/ex/beta-1.37-6/sources/1.36.0/gh/aPere3/playgrust"` [INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/aPere3/playgrust'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/aPere3/playgrust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aPere3/playgrust"` [INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aPere3/playgrust'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 13d1f4b7ee8a915dde19a6a33183494012a6f538 [INFO] sha for GitHub repo aPere3/playgrust: 13d1f4b7ee8a915dde19a6a33183494012a6f538 [INFO] validating manifest of aPere3/playgrust on toolchain 1.36.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of aPere3/playgrust on toolchain beta-2019-07-23 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing aPere3/playgrust [INFO] finished frobbing aPere3/playgrust [INFO] frobbed toml for aPere3/playgrust written to work/ex/beta-1.37-6/sources/1.36.0/gh/aPere3/playgrust/Cargo.toml [INFO] started frobbing aPere3/playgrust [INFO] finished frobbing aPere3/playgrust [INFO] frobbed toml for aPere3/playgrust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aPere3/playgrust/Cargo.toml [INFO] crate aPere3/playgrust already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing aPere3/playgrust against beta-2019-07-23 for beta-1.37-6 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aPere3/playgrust:/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" "+beta-2019-07-23" "build" "--frozen"` [INFO] [stdout] 2b768637d9081afe0709f914bff7d36fade366a4cc1dfa52125918d2ece8f545 [INFO] running `"docker" "start" "-a" "2b768637d9081afe0709f914bff7d36fade366a4cc1dfa52125918d2ece8f545"` [INFO] [stderr] Compiling playgrust v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: the item `Eq` is imported redundantly [INFO] [stderr] --> src/rust_book/mod.rs:1082:13 [INFO] [stderr] | [INFO] [stderr] 1082 | use std::cmp::Eq; [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `message` [INFO] [stderr] --> src/rust_book/mod.rs:802:17 [INFO] [stderr] | [INFO] [stderr] 802 | Err(message) => { [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_message` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `message` [INFO] [stderr] --> src/rust_book/mod.rs:819:17 [INFO] [stderr] | [INFO] [stderr] 819 | Err(message) => { [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_message` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `message` [INFO] [stderr] --> src/rust_book/mod.rs:836:17 [INFO] [stderr] | [INFO] [stderr] 836 | Err(message) => { [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_message` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/rust_book/mod.rs:847:17 [INFO] [stderr] | [INFO] [stderr] 847 | let f: Result<&str, &str> = Result::Err("Failure").unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/rust_book/mod.rs:850:17 [INFO] [stderr] | [INFO] [stderr] 850 | let f: Result<&str, &str> = Result::Err("Failure").expect("The program failed"); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/rust_book/mod.rs:1275:17 [INFO] [stderr] | [INFO] [stderr] 1275 | let a = MySmartPointer(String::from("Hey guys")); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/rust_book/mod.rs:1317:13 [INFO] [stderr] | [INFO] [stderr] 1317 | let b = List3::Cons(3, Rc::clone(&a)); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/rust_book/mod.rs:1320:17 [INFO] [stderr] | [INFO] [stderr] 1320 | let c = List3::Cons(4, Rc::clone(&a)); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_c` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `max_index` is never read [INFO] [stderr] --> src/rust_book/mod.rs:958:25 [INFO] [stderr] | [INFO] [stderr] 958 | let mut max_index = 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: variable does not need to be mutable [INFO] [stderr] --> src/rust_book/mod.rs:1182:13 [INFO] [stderr] | [INFO] [stderr] 1182 | let mut a = MyIterableArray::new(); [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 3.97s [INFO] running `"docker" "inspect" "2b768637d9081afe0709f914bff7d36fade366a4cc1dfa52125918d2ece8f545"` [INFO] running `"docker" "rm" "-f" "2b768637d9081afe0709f914bff7d36fade366a4cc1dfa52125918d2ece8f545"` [INFO] [stdout] 2b768637d9081afe0709f914bff7d36fade366a4cc1dfa52125918d2ece8f545 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aPere3/playgrust:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"` [INFO] [stdout] 31d7f89ffdbe0fd2bb7446d6d4b60cc450a7acbae17f3ec8b802851ed8d88076 [INFO] running `"docker" "start" "-a" "31d7f89ffdbe0fd2bb7446d6d4b60cc450a7acbae17f3ec8b802851ed8d88076"` [INFO] [stderr] Compiling playgrust v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: the item `Eq` is imported redundantly [INFO] [stderr] --> src/rust_book/mod.rs:1082:13 [INFO] [stderr] | [INFO] [stderr] 1082 | use std::cmp::Eq; [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `message` [INFO] [stderr] --> src/rust_book/mod.rs:802:17 [INFO] [stderr] | [INFO] [stderr] 802 | Err(message) => { [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_message` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `message` [INFO] [stderr] --> src/rust_book/mod.rs:819:17 [INFO] [stderr] | [INFO] [stderr] 819 | Err(message) => { [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_message` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `message` [INFO] [stderr] --> src/rust_book/mod.rs:836:17 [INFO] [stderr] | [INFO] [stderr] 836 | Err(message) => { [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_message` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/rust_book/mod.rs:847:17 [INFO] [stderr] | [INFO] [stderr] 847 | let f: Result<&str, &str> = Result::Err("Failure").unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/rust_book/mod.rs:850:17 [INFO] [stderr] | [INFO] [stderr] 850 | let f: Result<&str, &str> = Result::Err("Failure").expect("The program failed"); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/rust_book/mod.rs:1275:17 [INFO] [stderr] | [INFO] [stderr] 1275 | let a = MySmartPointer(String::from("Hey guys")); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/rust_book/mod.rs:1317:13 [INFO] [stderr] | [INFO] [stderr] 1317 | let b = List3::Cons(3, Rc::clone(&a)); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/rust_book/mod.rs:1320:17 [INFO] [stderr] | [INFO] [stderr] 1320 | let c = List3::Cons(4, Rc::clone(&a)); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_c` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `max_index` is never read [INFO] [stderr] --> src/rust_book/mod.rs:958:25 [INFO] [stderr] | [INFO] [stderr] 958 | let mut max_index = 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: variable does not need to be mutable [INFO] [stderr] --> src/rust_book/mod.rs:1182:13 [INFO] [stderr] | [INFO] [stderr] 1182 | let mut a = MyIterableArray::new(); [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 1.19s [INFO] running `"docker" "inspect" "31d7f89ffdbe0fd2bb7446d6d4b60cc450a7acbae17f3ec8b802851ed8d88076"` [INFO] running `"docker" "rm" "-f" "31d7f89ffdbe0fd2bb7446d6d4b60cc450a7acbae17f3ec8b802851ed8d88076"` [INFO] [stdout] 31d7f89ffdbe0fd2bb7446d6d4b60cc450a7acbae17f3ec8b802851ed8d88076 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aPere3/playgrust:/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" "+beta-2019-07-23" "test" "--frozen"` [INFO] [stdout] 5f155fa46eb94d6579fbffa77fc30e5e4dfc690c15e57dcc6be5cb3affcdf56b [INFO] running `"docker" "start" "-a" "5f155fa46eb94d6579fbffa77fc30e5e4dfc690c15e57dcc6be5cb3affcdf56b"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running /opt/crater/target/debug/deps/playgrust-eead62bfe6c36bf1 [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" "5f155fa46eb94d6579fbffa77fc30e5e4dfc690c15e57dcc6be5cb3affcdf56b"` [INFO] running `"docker" "rm" "-f" "5f155fa46eb94d6579fbffa77fc30e5e4dfc690c15e57dcc6be5cb3affcdf56b"` [INFO] [stdout] 5f155fa46eb94d6579fbffa77fc30e5e4dfc690c15e57dcc6be5cb3affcdf56b