[INFO] updating cached repository CGQAQ/Rust_Learn [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/CGQAQ/Rust_Learn [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/CGQAQ/Rust_Learn" "work/ex/beta-1.38-1/sources/1.37.0/gh/CGQAQ/Rust_Learn"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/CGQAQ/Rust_Learn'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/CGQAQ/Rust_Learn" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CGQAQ/Rust_Learn"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CGQAQ/Rust_Learn'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 30c0d8cc7aae4532df7bec023e8cacb42de77cf8 [INFO] sha for GitHub repo CGQAQ/Rust_Learn: 30c0d8cc7aae4532df7bec023e8cacb42de77cf8 [INFO] validating manifest of CGQAQ/Rust_Learn 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 CGQAQ/Rust_Learn 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 CGQAQ/Rust_Learn [INFO] finished frobbing CGQAQ/Rust_Learn [INFO] frobbed toml for CGQAQ/Rust_Learn written to work/ex/beta-1.38-1/sources/1.37.0/gh/CGQAQ/Rust_Learn/Cargo.toml [INFO] started frobbing CGQAQ/Rust_Learn [INFO] finished frobbing CGQAQ/Rust_Learn [INFO] frobbed toml for CGQAQ/Rust_Learn written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CGQAQ/Rust_Learn/Cargo.toml [INFO] crate CGQAQ/Rust_Learn 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 CGQAQ/Rust_Learn 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-1/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/CGQAQ/Rust_Learn:/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] c90c1e9ac55c9ef04ecdb961eefa03da27b8d1295bba752c9c80a80eaa35007d [INFO] running `"docker" "start" "-a" "c90c1e9ac55c9ef04ecdb961eefa03da27b8d1295bba752c9c80a80eaa35007d"` [INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently [INFO] [stderr] disables Cargo from automatically inferring other binary targets. [INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following [INFO] [stderr] files will be included as a binary target: [INFO] [stderr] [INFO] [stderr] * /opt/crater/workdir/src/main.rs [INFO] [stderr] [INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be [INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself [INFO] [stderr] and disable this warning by adding `autobins = false` to your [package] [INFO] [stderr] section. You may also move the files to a location where Cargo would not [INFO] [stderr] automatically infer them to be a target, such as in subfolders. [INFO] [stderr] [INFO] [stderr] For more information on this warning you can consult [INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330 [INFO] [stderr] warning: path `/opt/crater/workdir/src/main.rs` was erroneously implicitly accepted for binary `main`, [INFO] [stderr] please set bin.path in Cargo.toml [INFO] [stderr] Compiling learn v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/mthread.rs:11:9 [INFO] [stderr] | [INFO] [stderr] 11 | let mut ptr = Arc::new(Mutex::new("hello world!".chars())); [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: variable does not need to be mutable [INFO] [stderr] --> src/bin/mthread.rs:27:13 [INFO] [stderr] | [INFO] [stderr] 27 | let mut ptr = ptr.clone(); [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/mthread.rs:29:13 [INFO] [stderr] | [INFO] [stderr] 29 | let mut tx = tx.clone(); [INFO] [stderr] | ----^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/mthread.rs:20:21 [INFO] [stderr] | [INFO] [stderr] 20 | a.send(1); [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/bin/mthread.rs:34:17 [INFO] [stderr] | [INFO] [stderr] 34 | tx.send(d); [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 3.51s [INFO] running `"docker" "inspect" "c90c1e9ac55c9ef04ecdb961eefa03da27b8d1295bba752c9c80a80eaa35007d"` [INFO] running `"docker" "rm" "-f" "c90c1e9ac55c9ef04ecdb961eefa03da27b8d1295bba752c9c80a80eaa35007d"` [INFO] [stdout] c90c1e9ac55c9ef04ecdb961eefa03da27b8d1295bba752c9c80a80eaa35007d [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/CGQAQ/Rust_Learn:/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] 8e2448eaffccc7a9c6aebebd1ee8fb5b4bb36970864b8fbb80565e81a58d0216 [INFO] running `"docker" "start" "-a" "8e2448eaffccc7a9c6aebebd1ee8fb5b4bb36970864b8fbb80565e81a58d0216"` [INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently [INFO] [stderr] disables Cargo from automatically inferring other binary targets. [INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following [INFO] [stderr] files will be included as a binary target: [INFO] [stderr] [INFO] [stderr] * /opt/crater/workdir/src/main.rs [INFO] [stderr] [INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be [INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself [INFO] [stderr] and disable this warning by adding `autobins = false` to your [package] [INFO] [stderr] section. You may also move the files to a location where Cargo would not [INFO] [stderr] automatically infer them to be a target, such as in subfolders. [INFO] [stderr] [INFO] [stderr] For more information on this warning you can consult [INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330 [INFO] [stderr] warning: path `/opt/crater/workdir/src/main.rs` was erroneously implicitly accepted for binary `main`, [INFO] [stderr] please set bin.path in Cargo.toml [INFO] [stderr] Compiling learn v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/mthread.rs:11:9 [INFO] [stderr] | [INFO] [stderr] 11 | let mut ptr = Arc::new(Mutex::new("hello world!".chars())); [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: variable does not need to be mutable [INFO] [stderr] --> src/bin/mthread.rs:27:13 [INFO] [stderr] | [INFO] [stderr] 27 | let mut ptr = ptr.clone(); [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/mthread.rs:29:13 [INFO] [stderr] | [INFO] [stderr] 29 | let mut tx = tx.clone(); [INFO] [stderr] | ----^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/mthread.rs:20:21 [INFO] [stderr] | [INFO] [stderr] 20 | a.send(1); [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/bin/mthread.rs:34:17 [INFO] [stderr] | [INFO] [stderr] 34 | tx.send(d); [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 1.33s [INFO] running `"docker" "inspect" "8e2448eaffccc7a9c6aebebd1ee8fb5b4bb36970864b8fbb80565e81a58d0216"` [INFO] running `"docker" "rm" "-f" "8e2448eaffccc7a9c6aebebd1ee8fb5b4bb36970864b8fbb80565e81a58d0216"` [INFO] [stdout] 8e2448eaffccc7a9c6aebebd1ee8fb5b4bb36970864b8fbb80565e81a58d0216 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/CGQAQ/Rust_Learn:/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] 88761b41f8719fc005f26a3c3a8d77ff15dc8e286a30be9ffc18410a83d905a4 [INFO] running `"docker" "start" "-a" "88761b41f8719fc005f26a3c3a8d77ff15dc8e286a30be9ffc18410a83d905a4"` [INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently [INFO] [stderr] disables Cargo from automatically inferring other binary targets. [INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following [INFO] [stderr] files will be included as a binary target: [INFO] [stderr] [INFO] [stderr] * /opt/crater/workdir/src/main.rs [INFO] [stderr] [INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be [INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself [INFO] [stderr] and disable this warning by adding `autobins = false` to your [package] [INFO] [stderr] section. You may also move the files to a location where Cargo would not [INFO] [stderr] automatically infer them to be a target, such as in subfolders. [INFO] [stderr] [INFO] [stderr] For more information on this warning you can consult [INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330 [INFO] [stderr] warning: path `/opt/crater/workdir/src/main.rs` was erroneously implicitly accepted for binary `main`, [INFO] [stderr] please set bin.path in Cargo.toml [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running /opt/crater/target/debug/deps/demo-c369bd0ff340561a [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] [stderr] Running /opt/crater/target/debug/deps/main-43e5b2f6b2ddc00d [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] [stderr] Running /opt/crater/target/debug/deps/mthread-ea9de24ff9bee5ab [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" "88761b41f8719fc005f26a3c3a8d77ff15dc8e286a30be9ffc18410a83d905a4"` [INFO] running `"docker" "rm" "-f" "88761b41f8719fc005f26a3c3a8d77ff15dc8e286a30be9ffc18410a83d905a4"` [INFO] [stdout] 88761b41f8719fc005f26a3c3a8d77ff15dc8e286a30be9ffc18410a83d905a4