[INFO] updating cached repository deadcheat/remember_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/deadcheat/remember_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/deadcheat/remember_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/deadcheat/remember_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/deadcheat/remember_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/deadcheat/remember_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deadcheat/remember_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deadcheat/remember_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 410a0a01cae946dd669854c65dcb5b2688f5aa90
[INFO] sha for GitHub repo deadcheat/remember_rust: 410a0a01cae946dd669854c65dcb5b2688f5aa90
[INFO] validating manifest of deadcheat/remember_rust 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 deadcheat/remember_rust 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 deadcheat/remember_rust
[INFO] finished frobbing deadcheat/remember_rust
[INFO] frobbed toml for deadcheat/remember_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/deadcheat/remember_rust/Cargo.toml
[INFO] started frobbing deadcheat/remember_rust
[INFO] finished frobbing deadcheat/remember_rust
[INFO] frobbed toml for deadcheat/remember_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deadcheat/remember_rust/Cargo.toml
[INFO] crate deadcheat/remember_rust 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing deadcheat/remember_rust 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/deadcheat/remember_rust:/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] 6936a402eb07b43324e5d3965c1a8254441959c3b717a70238f92bd67f900280
[INFO] running `"docker" "start" "-a" "6936a402eb07b43324e5d3965c1a8254441959c3b717a70238f92bd67f900280"`
[INFO] [stderr]    Compiling remember_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `seasonal_fruit`
[INFO] [stderr]   --> src/lib.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |         seasonal_fruit: String,
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]    --> src/main.rs:177:9
[INFO] [stderr]     |
[INFO] [stderr] 177 |     let four = IpAddrKind::V4;
[INFO] [stderr]     |         ^^^^ help: consider prefixing with an underscore: `_four`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]    --> src/main.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |     let six = IpAddrKind::V6;
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_six`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `home`
[INFO] [stderr]    --> src/main.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |     let home = IpAddr::V4(String::from("127.0.0.1"));
[INFO] [stderr]     |         ^^^^ help: consider prefixing with an underscore: `_home`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `loopback`
[INFO] [stderr]    --> src/main.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |     let loopback = IpAddr::V6(String::from("::1"));
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_loopback`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/main.rs:213:9
[INFO] [stderr]     |
[INFO] [stderr] 213 |     let v: Vec<i32> = Vec::new();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]    --> src/main.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 244 |     let row = vec![
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_row`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/main.rs:251:9
[INFO] [stderr]     |
[INFO] [stderr] 251 |     let s = data.to_string();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/main.rs:254:9
[INFO] [stderr]     |
[INFO] [stderr] 254 |     let s = "initial contents".to_string();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Penny`
[INFO] [stderr]    --> src/main.rs:297:5
[INFO] [stderr]     |
[INFO] [stderr] 297 |     Penny,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nickel`
[INFO] [stderr]    --> src/main.rs:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     Nickel,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dime`
[INFO] [stderr]    --> src/main.rs:299:5
[INFO] [stderr]     |
[INFO] [stderr] 299 |     Dime,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Alaska`
[INFO] [stderr]    --> src/main.rs:305:5
[INFO] [stderr]     |
[INFO] [stderr] 305 |     Alaska,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]    --> src/main.rs:310:5
[INFO] [stderr]     |
[INFO] [stderr] 310 |     Quit,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Move`
[INFO] [stderr]    --> src/main.rs:311:5
[INFO] [stderr]     |
[INFO] [stderr] 311 |     Move { x: i32, y: i32 },
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ChangeColor`
[INFO] [stderr]    --> src/main.rs:313:5
[INFO] [stderr]     |
[INFO] [stderr] 313 |     ChangeColor(i32, i32, i32),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.89s
[INFO] running `"docker" "inspect" "6936a402eb07b43324e5d3965c1a8254441959c3b717a70238f92bd67f900280"`
[INFO] running `"docker" "rm" "-f" "6936a402eb07b43324e5d3965c1a8254441959c3b717a70238f92bd67f900280"`
[INFO] [stdout] 6936a402eb07b43324e5d3965c1a8254441959c3b717a70238f92bd67f900280
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/deadcheat/remember_rust:/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] cbe629a7810c612e46483f7b4252dc9abf6d47713be1a133272881e25da7ac98
[INFO] running `"docker" "start" "-a" "cbe629a7810c612e46483f7b4252dc9abf6d47713be1a133272881e25da7ac98"`
[INFO] [stderr]    Compiling remember_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `seasonal_fruit`
[INFO] [stderr]   --> src/lib.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |         seasonal_fruit: String,
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]    --> src/main.rs:177:9
[INFO] [stderr]     |
[INFO] [stderr] 177 |     let four = IpAddrKind::V4;
[INFO] [stderr]     |         ^^^^ help: consider prefixing with an underscore: `_four`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]    --> src/main.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |     let six = IpAddrKind::V6;
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_six`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `home`
[INFO] [stderr]    --> src/main.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |     let home = IpAddr::V4(String::from("127.0.0.1"));
[INFO] [stderr]     |         ^^^^ help: consider prefixing with an underscore: `_home`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `loopback`
[INFO] [stderr]    --> src/main.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |     let loopback = IpAddr::V6(String::from("::1"));
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_loopback`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/main.rs:213:9
[INFO] [stderr]     |
[INFO] [stderr] 213 |     let v: Vec<i32> = Vec::new();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]    --> src/main.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 244 |     let row = vec![
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_row`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/main.rs:251:9
[INFO] [stderr]     |
[INFO] [stderr] 251 |     let s = data.to_string();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/main.rs:254:9
[INFO] [stderr]     |
[INFO] [stderr] 254 |     let s = "initial contents".to_string();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Penny`
[INFO] [stderr]    --> src/main.rs:297:5
[INFO] [stderr]     |
[INFO] [stderr] 297 |     Penny,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nickel`
[INFO] [stderr]    --> src/main.rs:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     Nickel,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dime`
[INFO] [stderr]    --> src/main.rs:299:5
[INFO] [stderr]     |
[INFO] [stderr] 299 |     Dime,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Alaska`
[INFO] [stderr]    --> src/main.rs:305:5
[INFO] [stderr]     |
[INFO] [stderr] 305 |     Alaska,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]    --> src/main.rs:310:5
[INFO] [stderr]     |
[INFO] [stderr] 310 |     Quit,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Move`
[INFO] [stderr]    --> src/main.rs:311:5
[INFO] [stderr]     |
[INFO] [stderr] 311 |     Move { x: i32, y: i32 },
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ChangeColor`
[INFO] [stderr]    --> src/main.rs:313:5
[INFO] [stderr]     |
[INFO] [stderr] 313 |     ChangeColor(i32, i32, i32),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "cbe629a7810c612e46483f7b4252dc9abf6d47713be1a133272881e25da7ac98"`
[INFO] running `"docker" "rm" "-f" "cbe629a7810c612e46483f7b4252dc9abf6d47713be1a133272881e25da7ac98"`
[INFO] [stdout] cbe629a7810c612e46483f7b4252dc9abf6d47713be1a133272881e25da7ac98
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/deadcheat/remember_rust:/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] 90d4425587cd442d29cd25538f3b2d8949ad8fc4e2cffb689a14d3b859e0a9a4
[INFO] running `"docker" "start" "-a" "90d4425587cd442d29cd25538f3b2d8949ad8fc4e2cffb689a14d3b859e0a9a4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/remember_rust-9a50e5b05e11c5ab
[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/remember_rust-0cbae6a1d888b6f5
[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]    Doc-tests remember_rust
[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" "90d4425587cd442d29cd25538f3b2d8949ad8fc4e2cffb689a14d3b859e0a9a4"`
[INFO] running `"docker" "rm" "-f" "90d4425587cd442d29cd25538f3b2d8949ad8fc4e2cffb689a14d3b859e0a9a4"`
[INFO] [stdout] 90d4425587cd442d29cd25538f3b2d8949ad8fc4e2cffb689a14d3b859e0a9a4