[INFO] updating cached repository amitdash291/rust_lifetimes [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/amitdash291/rust_lifetimes [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/amitdash291/rust_lifetimes" "work/ex/beta-1.38-1/sources/1.37.0/gh/amitdash291/rust_lifetimes"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/amitdash291/rust_lifetimes'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/amitdash291/rust_lifetimes" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitdash291/rust_lifetimes"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitdash291/rust_lifetimes'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 1de31b9f2321d84ba42e1c3319e2142917794fe9 [INFO] sha for GitHub repo amitdash291/rust_lifetimes: 1de31b9f2321d84ba42e1c3319e2142917794fe9 [INFO] validating manifest of amitdash291/rust_lifetimes 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 amitdash291/rust_lifetimes 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 amitdash291/rust_lifetimes [INFO] finished frobbing amitdash291/rust_lifetimes [INFO] frobbed toml for amitdash291/rust_lifetimes written to work/ex/beta-1.38-1/sources/1.37.0/gh/amitdash291/rust_lifetimes/Cargo.toml [INFO] started frobbing amitdash291/rust_lifetimes [INFO] finished frobbing amitdash291/rust_lifetimes [INFO] frobbed toml for amitdash291/rust_lifetimes written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitdash291/rust_lifetimes/Cargo.toml [INFO] crate amitdash291/rust_lifetimes 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 amitdash291/rust_lifetimes 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/amitdash291/rust_lifetimes:/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] 059eebb9265fdbed8fc91cd1b6ffa06f897e9a48a1d2d00e40c5db866dc90e92 [INFO] running `"docker" "start" "-a" "059eebb9265fdbed8fc91cd1b6ffa06f897e9a48a1d2d00e40c5db866dc90e92"` [INFO] [stderr] Compiling lifetime_demo v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable `result_ref` is assigned to, but never used [INFO] [stderr] --> src/main.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let result_ref; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] = note: consider using `_result_ref` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result_ref` is never read [INFO] [stderr] --> src/main.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | result_ref = which_is_greater(&a, &b) [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: `a` [INFO] [stderr] --> src/main.rs:25:29 [INFO] [stderr] | [INFO] [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/main.rs:25:41 [INFO] [stderr] | [INFO] [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `vec1` [INFO] [stderr] --> src/main.rs:37:13 [INFO] [stderr] | [INFO] [stderr] 37 | let mut vec1: Vec = Vec::new(); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_vec1` [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 vec1: Vec = Vec::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] warning: function is never used: `test_mut_ref` [INFO] [stderr] --> src/main.rs:34:1 [INFO] [stderr] | [INFO] [stderr] 34 | fn test_mut_ref() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `copy_vec` [INFO] [stderr] --> src/main.rs:40:1 [INFO] [stderr] | [INFO] [stderr] 40 | fn copy_vec(from: &Vec, to: &mut Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.44s [INFO] running `"docker" "inspect" "059eebb9265fdbed8fc91cd1b6ffa06f897e9a48a1d2d00e40c5db866dc90e92"` [INFO] running `"docker" "rm" "-f" "059eebb9265fdbed8fc91cd1b6ffa06f897e9a48a1d2d00e40c5db866dc90e92"` [INFO] [stdout] 059eebb9265fdbed8fc91cd1b6ffa06f897e9a48a1d2d00e40c5db866dc90e92 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/amitdash291/rust_lifetimes:/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] 7a1c0035d321ac6428da48aee3b568055c8f3419262ffedd30307d1a45ea0992 [INFO] running `"docker" "start" "-a" "7a1c0035d321ac6428da48aee3b568055c8f3419262ffedd30307d1a45ea0992"` [INFO] [stderr] Compiling lifetime_demo v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable `result_ref` is assigned to, but never used [INFO] [stderr] --> src/main.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let result_ref; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] = note: consider using `_result_ref` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result_ref` is never read [INFO] [stderr] --> src/main.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | result_ref = which_is_greater(&a, &b) [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: `a` [INFO] [stderr] --> src/main.rs:25:29 [INFO] [stderr] | [INFO] [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/main.rs:25:41 [INFO] [stderr] | [INFO] [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `vec1` [INFO] [stderr] --> src/main.rs:37:13 [INFO] [stderr] | [INFO] [stderr] 37 | let mut vec1: Vec = Vec::new(); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_vec1` [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 vec1: Vec = Vec::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] warning: function is never used: `test_mut_ref` [INFO] [stderr] --> src/main.rs:34:1 [INFO] [stderr] | [INFO] [stderr] 34 | fn test_mut_ref() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `copy_vec` [INFO] [stderr] --> src/main.rs:40:1 [INFO] [stderr] | [INFO] [stderr] 40 | fn copy_vec(from: &Vec, to: &mut Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.57s [INFO] running `"docker" "inspect" "7a1c0035d321ac6428da48aee3b568055c8f3419262ffedd30307d1a45ea0992"` [INFO] running `"docker" "rm" "-f" "7a1c0035d321ac6428da48aee3b568055c8f3419262ffedd30307d1a45ea0992"` [INFO] [stdout] 7a1c0035d321ac6428da48aee3b568055c8f3419262ffedd30307d1a45ea0992 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/amitdash291/rust_lifetimes:/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] 890212e40cb8b0018e1bb4e87ca4372632f8216df1ed8267c110964bbd1a6474 [INFO] running `"docker" "start" "-a" "890212e40cb8b0018e1bb4e87ca4372632f8216df1ed8267c110964bbd1a6474"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.05s [INFO] [stderr] Running /opt/crater/target/debug/deps/lifetime_demo-ba7be7435c4daca2 [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" "890212e40cb8b0018e1bb4e87ca4372632f8216df1ed8267c110964bbd1a6474"` [INFO] running `"docker" "rm" "-f" "890212e40cb8b0018e1bb4e87ca4372632f8216df1ed8267c110964bbd1a6474"` [INFO] [stdout] 890212e40cb8b0018e1bb4e87ca4372632f8216df1ed8267c110964bbd1a6474