[INFO] updating cached repository halcyon/rust_tut [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/halcyon/rust_tut [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/halcyon/rust_tut" "work/ex/beta-1.38-1/sources/1.37.0/gh/halcyon/rust_tut"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/halcyon/rust_tut'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/halcyon/rust_tut" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/halcyon/rust_tut"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/halcyon/rust_tut'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 558bf4aae326605a6934155e7faf29e8747627d9 [INFO] sha for GitHub repo halcyon/rust_tut: 558bf4aae326605a6934155e7faf29e8747627d9 [INFO] validating manifest of halcyon/rust_tut 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 halcyon/rust_tut 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 halcyon/rust_tut [INFO] finished frobbing halcyon/rust_tut [INFO] frobbed toml for halcyon/rust_tut written to work/ex/beta-1.38-1/sources/1.37.0/gh/halcyon/rust_tut/Cargo.toml [INFO] started frobbing halcyon/rust_tut [INFO] finished frobbing halcyon/rust_tut [INFO] frobbed toml for halcyon/rust_tut written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/halcyon/rust_tut/Cargo.toml [INFO] crate halcyon/rust_tut 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 halcyon/rust_tut 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/halcyon/rust_tut:/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] 7d852fa3ccb85497c0c7b8f717f8f30a587f951cce5d2e0db3a48268b0af4863 [INFO] running `"docker" "start" "-a" "7d852fa3ccb85497c0c7b8f717f8f30a587f951cce5d2e0db3a48268b0af4863"` [INFO] [stderr] Compiling rust_tut v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused imports: `u16`, `u32`, `u64`, `u8` [INFO] [stderr] --> src/main.rs:1:30 [INFO] [stderr] | [INFO] [stderr] 1 | use std::{i8, i16, i32, i64, u8, u16, u32, u64, isize, usize, f32, f64}; [INFO] [stderr] | ^^ ^^^ ^^^ ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:62:8 [INFO] [stderr] | [INFO] [stderr] 62 | if (age_old == 5) { [INFO] [stderr] | ^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:78:23 [INFO] [stderr] | [INFO] [stderr] 78 | let can_vote = if (age_old >= 18) { true } else { false }; [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:85:12 [INFO] [stderr] | [INFO] [stderr] 85 | if ((x % 2) == 0) { [INFO] [stderr] | ^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:90:12 [INFO] [stderr] | [INFO] [stderr] 90 | if (x > 10) { [INFO] [stderr] | ^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unused variable: `num` [INFO] [stderr] --> src/main.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | let num = 10; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_num` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f_name` [INFO] [stderr] --> src/main.rs:34:10 [INFO] [stderr] | [INFO] [stderr] 34 | let (f_name, l_name) = ("Derek", "Banas"); [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_f_name` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `l_name` [INFO] [stderr] --> src/main.rs:34:18 [INFO] [stderr] | [INFO] [stderr] 34 | let (f_name, l_name) = ("Derek", "Banas"); [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_l_name` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `count` [INFO] [stderr] --> src/main.rs:116:9 [INFO] [stderr] | [INFO] [stderr] 116 | let count = rand_string.chars().count(); [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_count` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | let mut age: i32 = 40; [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/main.rs:52:9 [INFO] [stderr] | [INFO] [stderr] 52 | let mut neg_4 = -4i32; [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.23s [INFO] running `"docker" "inspect" "7d852fa3ccb85497c0c7b8f717f8f30a587f951cce5d2e0db3a48268b0af4863"` [INFO] running `"docker" "rm" "-f" "7d852fa3ccb85497c0c7b8f717f8f30a587f951cce5d2e0db3a48268b0af4863"` [INFO] [stdout] 7d852fa3ccb85497c0c7b8f717f8f30a587f951cce5d2e0db3a48268b0af4863 [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/halcyon/rust_tut:/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] 18c1f357d0bd3a3a7db11efd37bf525fdb5ab60248be19f5851ad9398b65bf36 [INFO] running `"docker" "start" "-a" "18c1f357d0bd3a3a7db11efd37bf525fdb5ab60248be19f5851ad9398b65bf36"` [INFO] [stderr] Compiling rust_tut v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused imports: `u16`, `u32`, `u64`, `u8` [INFO] [stderr] --> src/main.rs:1:30 [INFO] [stderr] | [INFO] [stderr] 1 | use std::{i8, i16, i32, i64, u8, u16, u32, u64, isize, usize, f32, f64}; [INFO] [stderr] | ^^ ^^^ ^^^ ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:62:8 [INFO] [stderr] | [INFO] [stderr] 62 | if (age_old == 5) { [INFO] [stderr] | ^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:78:23 [INFO] [stderr] | [INFO] [stderr] 78 | let can_vote = if (age_old >= 18) { true } else { false }; [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:85:12 [INFO] [stderr] | [INFO] [stderr] 85 | if ((x % 2) == 0) { [INFO] [stderr] | ^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/main.rs:90:12 [INFO] [stderr] | [INFO] [stderr] 90 | if (x > 10) { [INFO] [stderr] | ^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unused variable: `num` [INFO] [stderr] --> src/main.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | let num = 10; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_num` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f_name` [INFO] [stderr] --> src/main.rs:34:10 [INFO] [stderr] | [INFO] [stderr] 34 | let (f_name, l_name) = ("Derek", "Banas"); [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_f_name` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `l_name` [INFO] [stderr] --> src/main.rs:34:18 [INFO] [stderr] | [INFO] [stderr] 34 | let (f_name, l_name) = ("Derek", "Banas"); [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_l_name` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `count` [INFO] [stderr] --> src/main.rs:116:9 [INFO] [stderr] | [INFO] [stderr] 116 | let count = rand_string.chars().count(); [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_count` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | let mut age: i32 = 40; [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/main.rs:52:9 [INFO] [stderr] | [INFO] [stderr] 52 | let mut neg_4 = -4i32; [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.10s [INFO] running `"docker" "inspect" "18c1f357d0bd3a3a7db11efd37bf525fdb5ab60248be19f5851ad9398b65bf36"` [INFO] running `"docker" "rm" "-f" "18c1f357d0bd3a3a7db11efd37bf525fdb5ab60248be19f5851ad9398b65bf36"` [INFO] [stdout] 18c1f357d0bd3a3a7db11efd37bf525fdb5ab60248be19f5851ad9398b65bf36 [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/halcyon/rust_tut:/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] d42310114b9d41f2cd148942acc9910c664963ecae131db1f32fc7b8830e8edd [INFO] running `"docker" "start" "-a" "d42310114b9d41f2cd148942acc9910c664963ecae131db1f32fc7b8830e8edd"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running /opt/crater/target/debug/deps/rust_tut-6f5c577737e402f5 [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" "d42310114b9d41f2cd148942acc9910c664963ecae131db1f32fc7b8830e8edd"` [INFO] running `"docker" "rm" "-f" "d42310114b9d41f2cd148942acc9910c664963ecae131db1f32fc7b8830e8edd"` [INFO] [stdout] d42310114b9d41f2cd148942acc9910c664963ecae131db1f32fc7b8830e8edd