[INFO] updating cached repository Dylan-DPC/thread-lifetime-experiment [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/Dylan-DPC/thread-lifetime-experiment [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/Dylan-DPC/thread-lifetime-experiment" "work/ex/beta-1.38-1/sources/1.37.0/gh/Dylan-DPC/thread-lifetime-experiment"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Dylan-DPC/thread-lifetime-experiment'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/Dylan-DPC/thread-lifetime-experiment" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Dylan-DPC/thread-lifetime-experiment"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Dylan-DPC/thread-lifetime-experiment'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] e8a4f3f52d9fb0400d8eb2ba5f57911ceef3ba11 [INFO] sha for GitHub repo Dylan-DPC/thread-lifetime-experiment: e8a4f3f52d9fb0400d8eb2ba5f57911ceef3ba11 [INFO] validating manifest of Dylan-DPC/thread-lifetime-experiment 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 Dylan-DPC/thread-lifetime-experiment 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 Dylan-DPC/thread-lifetime-experiment [INFO] finished frobbing Dylan-DPC/thread-lifetime-experiment [INFO] frobbed toml for Dylan-DPC/thread-lifetime-experiment written to work/ex/beta-1.38-1/sources/1.37.0/gh/Dylan-DPC/thread-lifetime-experiment/Cargo.toml [INFO] started frobbing Dylan-DPC/thread-lifetime-experiment [INFO] finished frobbing Dylan-DPC/thread-lifetime-experiment [INFO] frobbed toml for Dylan-DPC/thread-lifetime-experiment written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Dylan-DPC/thread-lifetime-experiment/Cargo.toml [INFO] crate Dylan-DPC/thread-lifetime-experiment 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing Dylan-DPC/thread-lifetime-experiment against beta-2019-08-13 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Dylan-DPC/thread-lifetime-experiment:/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-2019-08-13" "build" "--frozen"` [INFO] [stdout] d0033880d9c23ac759f284afdd1698a382c49e56c5ca114e011a5f2fd4035b62 [INFO] running `"docker" "start" "-a" "d0033880d9c23ac759f284afdd1698a382c49e56c5ca114e011a5f2fd4035b62"` [INFO] [stderr] Compiling syn v0.15.30 [INFO] [stderr] Compiling libc v0.2.51 [INFO] [stderr] Compiling serde v1.0.90 [INFO] [stderr] Compiling stable_deref_trait v1.1.1 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Compiling page_size v0.4.1 [INFO] [stderr] Compiling serde_derive v1.0.90 [INFO] [stderr] Compiling rental-impl v0.5.2 [INFO] [stderr] Compiling rental v0.5.3 [INFO] [stderr] Compiling serde_json v1.0.39 [INFO] [stderr] Compiling hashbrown v0.2.0 [INFO] [stderr] Compiling simdjson v0.1.0 (https://github.com/Licenser/simdjson-rs#4d53c41a) [INFO] [stderr] Compiling thread-lifetime-experiment v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:62:25 [INFO] [stderr] | [INFO] [stderr] 62 | let mut content = line.unwrap(); [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] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:28:5 [INFO] [stderr] | [INFO] [stderr] 28 | / thread::scope(|t| { [INFO] [stderr] 29 | | let (s1, r1): (Sender, Receiver) = bounded(5); [INFO] [stderr] 30 | | let (s2, r2): (Sender, Receiver) = bounded(5); [INFO] [stderr] 31 | | t.spawn(move |_| { [INFO] [stderr] ... | [INFO] [stderr] 70 | | }); [INFO] [stderr] 71 | | }); [INFO] [stderr] | |_______^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:53:17 [INFO] [stderr] | [INFO] [stderr] 53 | s2.send(data); [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:67:21 [INFO] [stderr] | [INFO] [stderr] 67 | s1.send(value); [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 22s [INFO] running `"docker" "inspect" "d0033880d9c23ac759f284afdd1698a382c49e56c5ca114e011a5f2fd4035b62"` [INFO] running `"docker" "rm" "-f" "d0033880d9c23ac759f284afdd1698a382c49e56c5ca114e011a5f2fd4035b62"` [INFO] [stdout] d0033880d9c23ac759f284afdd1698a382c49e56c5ca114e011a5f2fd4035b62 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Dylan-DPC/thread-lifetime-experiment:/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-2019-08-13" "test" "--frozen" "--no-run"` [INFO] [stdout] a13db67e3ca9cca98386bbccc391ff27ec071c54bc1a7e3b92293021d144e15d [INFO] running `"docker" "start" "-a" "a13db67e3ca9cca98386bbccc391ff27ec071c54bc1a7e3b92293021d144e15d"` [INFO] [stderr] Compiling thread-lifetime-experiment v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:62:25 [INFO] [stderr] | [INFO] [stderr] 62 | let mut content = line.unwrap(); [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] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:28:5 [INFO] [stderr] | [INFO] [stderr] 28 | / thread::scope(|t| { [INFO] [stderr] 29 | | let (s1, r1): (Sender, Receiver) = bounded(5); [INFO] [stderr] 30 | | let (s2, r2): (Sender, Receiver) = bounded(5); [INFO] [stderr] 31 | | t.spawn(move |_| { [INFO] [stderr] ... | [INFO] [stderr] 70 | | }); [INFO] [stderr] 71 | | }); [INFO] [stderr] | |_______^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:53:17 [INFO] [stderr] | [INFO] [stderr] 53 | s2.send(data); [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:67:21 [INFO] [stderr] | [INFO] [stderr] 67 | s1.send(value); [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.95s [INFO] running `"docker" "inspect" "a13db67e3ca9cca98386bbccc391ff27ec071c54bc1a7e3b92293021d144e15d"` [INFO] running `"docker" "rm" "-f" "a13db67e3ca9cca98386bbccc391ff27ec071c54bc1a7e3b92293021d144e15d"` [INFO] [stdout] a13db67e3ca9cca98386bbccc391ff27ec071c54bc1a7e3b92293021d144e15d [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Dylan-DPC/thread-lifetime-experiment:/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-2019-08-13" "test" "--frozen"` [INFO] [stdout] 399e170ca6042171a5174692935cbdc792742dde57feeaa6448b8b766c2a3bc0 [INFO] running `"docker" "start" "-a" "399e170ca6042171a5174692935cbdc792742dde57feeaa6448b8b766c2a3bc0"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.13s [INFO] [stderr] Running /opt/crater/target/debug/deps/thread_lifetime_experiment-0cff44243f3ab213 [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" "399e170ca6042171a5174692935cbdc792742dde57feeaa6448b8b766c2a3bc0"` [INFO] running `"docker" "rm" "-f" "399e170ca6042171a5174692935cbdc792742dde57feeaa6448b8b766c2a3bc0"` [INFO] [stdout] 399e170ca6042171a5174692935cbdc792742dde57feeaa6448b8b766c2a3bc0