[INFO] updating cached repository mathieu-anderson/rust_variables_and_types [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/mathieu-anderson/rust_variables_and_types [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/mathieu-anderson/rust_variables_and_types" "work/ex/beta-1.38-1/sources/1.37.0/gh/mathieu-anderson/rust_variables_and_types"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mathieu-anderson/rust_variables_and_types'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/mathieu-anderson/rust_variables_and_types" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mathieu-anderson/rust_variables_and_types"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mathieu-anderson/rust_variables_and_types'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] efdcd87693da19018237ecb002882e1974a099e8 [INFO] sha for GitHub repo mathieu-anderson/rust_variables_and_types: efdcd87693da19018237ecb002882e1974a099e8 [INFO] validating manifest of mathieu-anderson/rust_variables_and_types 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 mathieu-anderson/rust_variables_and_types 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 mathieu-anderson/rust_variables_and_types [INFO] finished frobbing mathieu-anderson/rust_variables_and_types [INFO] frobbed toml for mathieu-anderson/rust_variables_and_types written to work/ex/beta-1.38-1/sources/1.37.0/gh/mathieu-anderson/rust_variables_and_types/Cargo.toml [INFO] started frobbing mathieu-anderson/rust_variables_and_types [INFO] finished frobbing mathieu-anderson/rust_variables_and_types [INFO] frobbed toml for mathieu-anderson/rust_variables_and_types written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mathieu-anderson/rust_variables_and_types/Cargo.toml [INFO] crate mathieu-anderson/rust_variables_and_types 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 mathieu-anderson/rust_variables_and_types 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-4/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/mathieu-anderson/rust_variables_and_types:/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] c69c6540e284b0961b2e19a164ab69a7df57b13efeead063790186ccf0c73f05 [INFO] running `"docker" "start" "-a" "c69c6540e284b0961b2e19a164ab69a7df57b13efeead063790186ccf0c73f05"` [INFO] [stderr] Compiling rust_variables v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable `default_integer` is assigned to, but never used [INFO] [stderr] --> src/main.rs:34:13 [INFO] [stderr] | [INFO] [stderr] 34 | let mut default_integer = 56; [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] = note: consider using `_default_integer` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `default_integer` is never read [INFO] [stderr] --> src/main.rs:35:5 [INFO] [stderr] | [INFO] [stderr] 35 | default_integer = -45; [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: `defined_integer` [INFO] [stderr] --> src/main.rs:36:13 [INFO] [stderr] | [INFO] [stderr] 36 | let mut defined_integer: u64 = 76; [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_defined_integer` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `default_float` [INFO] [stderr] --> src/main.rs:41:9 [INFO] [stderr] | [INFO] [stderr] 41 | let default_float = 2.0; [INFO] [stderr] | ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_default_float` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `char_var` [INFO] [stderr] --> src/main.rs:45:9 [INFO] [stderr] | [INFO] [stderr] 45 | let char_var = 'k'; [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_char_var` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `char_var_emoji` [INFO] [stderr] --> src/main.rs:46:9 [INFO] [stderr] | [INFO] [stderr] 46 | let char_var_emoji = '😵'; [INFO] [stderr] | ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_char_var_emoji` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/main.rs:51:13 [INFO] [stderr] | [INFO] [stderr] 51 | let (x, y, z) = tup; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/main.rs:51:16 [INFO] [stderr] | [INFO] [stderr] 51 | let (x, y, z) = tup; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `arr` [INFO] [stderr] --> src/main.rs:58:9 [INFO] [stderr] | [INFO] [stderr] 58 | let arr = [1, 23, 67]; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_arr` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `months` [INFO] [stderr] --> src/main.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let months: [&str; 3] = ["January", "February", "March"]; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_months` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:36:9 [INFO] [stderr] | [INFO] [stderr] 36 | let mut defined_integer: u64 = 76; [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] Finished dev [unoptimized + debuginfo] target(s) in 0.65s [INFO] running `"docker" "inspect" "c69c6540e284b0961b2e19a164ab69a7df57b13efeead063790186ccf0c73f05"` [INFO] running `"docker" "rm" "-f" "c69c6540e284b0961b2e19a164ab69a7df57b13efeead063790186ccf0c73f05"` [INFO] [stdout] c69c6540e284b0961b2e19a164ab69a7df57b13efeead063790186ccf0c73f05 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/mathieu-anderson/rust_variables_and_types:/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] d7eee62798c73d8986d76c86673d6fa7a16d0ae405a6dd4325f01406a0342379 [INFO] running `"docker" "start" "-a" "d7eee62798c73d8986d76c86673d6fa7a16d0ae405a6dd4325f01406a0342379"` [INFO] [stderr] Compiling rust_variables v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable `default_integer` is assigned to, but never used [INFO] [stderr] --> src/main.rs:34:13 [INFO] [stderr] | [INFO] [stderr] 34 | let mut default_integer = 56; [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] = note: consider using `_default_integer` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `default_integer` is never read [INFO] [stderr] --> src/main.rs:35:5 [INFO] [stderr] | [INFO] [stderr] 35 | default_integer = -45; [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: `defined_integer` [INFO] [stderr] --> src/main.rs:36:13 [INFO] [stderr] | [INFO] [stderr] 36 | let mut defined_integer: u64 = 76; [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_defined_integer` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `default_float` [INFO] [stderr] --> src/main.rs:41:9 [INFO] [stderr] | [INFO] [stderr] 41 | let default_float = 2.0; [INFO] [stderr] | ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_default_float` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `char_var` [INFO] [stderr] --> src/main.rs:45:9 [INFO] [stderr] | [INFO] [stderr] 45 | let char_var = 'k'; [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_char_var` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `char_var_emoji` [INFO] [stderr] --> src/main.rs:46:9 [INFO] [stderr] | [INFO] [stderr] 46 | let char_var_emoji = '😵'; [INFO] [stderr] | ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_char_var_emoji` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/main.rs:51:13 [INFO] [stderr] | [INFO] [stderr] 51 | let (x, y, z) = tup; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/main.rs:51:16 [INFO] [stderr] | [INFO] [stderr] 51 | let (x, y, z) = tup; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `arr` [INFO] [stderr] --> src/main.rs:58:9 [INFO] [stderr] | [INFO] [stderr] 58 | let arr = [1, 23, 67]; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_arr` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `months` [INFO] [stderr] --> src/main.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let months: [&str; 3] = ["January", "February", "March"]; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_months` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:36:9 [INFO] [stderr] | [INFO] [stderr] 36 | let mut defined_integer: u64 = 76; [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] Finished dev [unoptimized + debuginfo] target(s) in 0.83s [INFO] running `"docker" "inspect" "d7eee62798c73d8986d76c86673d6fa7a16d0ae405a6dd4325f01406a0342379"` [INFO] running `"docker" "rm" "-f" "d7eee62798c73d8986d76c86673d6fa7a16d0ae405a6dd4325f01406a0342379"` [INFO] [stdout] d7eee62798c73d8986d76c86673d6fa7a16d0ae405a6dd4325f01406a0342379 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/mathieu-anderson/rust_variables_and_types:/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] 697026f4acf5392a2f6000d0b0c0a236b7ba95045fa5b4782535db4bdfdbf647 [INFO] running `"docker" "start" "-a" "697026f4acf5392a2f6000d0b0c0a236b7ba95045fa5b4782535db4bdfdbf647"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running /opt/crater/target/debug/deps/rust_variables-1940c68f0264d33b [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" "697026f4acf5392a2f6000d0b0c0a236b7ba95045fa5b4782535db4bdfdbf647"` [INFO] running `"docker" "rm" "-f" "697026f4acf5392a2f6000d0b0c0a236b7ba95045fa5b4782535db4bdfdbf647"` [INFO] [stdout] 697026f4acf5392a2f6000d0b0c0a236b7ba95045fa5b4782535db4bdfdbf647