[INFO] updating cached repository modeverv/RustLeapYear20190604
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/modeverv/RustLeapYear20190604
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/modeverv/RustLeapYear20190604" "work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/RustLeapYear20190604"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/RustLeapYear20190604'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/modeverv/RustLeapYear20190604" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/modeverv/RustLeapYear20190604"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/modeverv/RustLeapYear20190604'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 90884dd23ceca636389559eed6b42025655f147c
[INFO] sha for GitHub repo modeverv/RustLeapYear20190604: 90884dd23ceca636389559eed6b42025655f147c
[INFO] validating manifest of modeverv/RustLeapYear20190604 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 modeverv/RustLeapYear20190604 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 modeverv/RustLeapYear20190604
[INFO] finished frobbing modeverv/RustLeapYear20190604
[INFO] frobbed toml for modeverv/RustLeapYear20190604 written to work/ex/beta-1.38-1/sources/1.37.0/gh/modeverv/RustLeapYear20190604/Cargo.toml
[INFO] started frobbing modeverv/RustLeapYear20190604
[INFO] finished frobbing modeverv/RustLeapYear20190604
[INFO] frobbed toml for modeverv/RustLeapYear20190604 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/modeverv/RustLeapYear20190604/Cargo.toml
[INFO] crate modeverv/RustLeapYear20190604 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 modeverv/RustLeapYear20190604 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-7/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/modeverv/RustLeapYear20190604:/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] 2c4c7e928b0d785ae168e1116e41ea94256a01e8b55879d8330b316e99969748
[INFO] running `"docker" "start" "-a" "2c4c7e928b0d785ae168e1116e41ea94256a01e8b55879d8330b316e99969748"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling leap-year20190604 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let a = "aaaaaaee";
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `b` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut b = "aefeae";
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_b` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `b` is never read
[INFO] [stderr]   --> src/main.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     b = "ccccc";
[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:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let a = 1;
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let a = 1;
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ans3`
[INFO] [stderr]   --> src/main.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let ans3 = 70.0 + 8.9;
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_ans3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mm`
[INFO] [stderr]   --> src/main.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let mm = match val {
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_mm`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `string`
[INFO] [stderr]   --> src/main.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let string = match unknown {
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_string`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]   --> src/main.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let m = match string {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_m`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ten`
[INFO] [stderr]   --> src/main.rs:92:9
[INFO] [stderr]    |
[INFO] [stderr] 92 |     let ten = loop {
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_ten`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `plus_one`
[INFO] [stderr]    --> src/main.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let plus_one = |x: u32| {
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_plus_one`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `plus_one`
[INFO] [stderr]    --> src/main.rs:121:9
[INFO] [stderr]     |
[INFO] [stderr] 121 |     let plus_one = move |x:u32| {
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_plus_one`
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SECRET`
[INFO] [stderr]   --> src/main.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     const SECRET: i32 = 111;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `STTC`
[INFO] [stderr]   --> src/main.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     static STTC:i32 = 222;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `echo`
[INFO] [stderr]    --> src/main.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn echo() {
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "2c4c7e928b0d785ae168e1116e41ea94256a01e8b55879d8330b316e99969748"`
[INFO] running `"docker" "rm" "-f" "2c4c7e928b0d785ae168e1116e41ea94256a01e8b55879d8330b316e99969748"`
[INFO] [stdout] 2c4c7e928b0d785ae168e1116e41ea94256a01e8b55879d8330b316e99969748
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/modeverv/RustLeapYear20190604:/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] c7eb36528fb32ba35a1bb5e34b59173cfd4f1b3f6fc37e60ad7c0db47d0236ad
[INFO] running `"docker" "start" "-a" "c7eb36528fb32ba35a1bb5e34b59173cfd4f1b3f6fc37e60ad7c0db47d0236ad"`
[INFO] [stderr]    Compiling leap-year20190604 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let a = "aaaaaaee";
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `b` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut b = "aefeae";
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_b` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `b` is never read
[INFO] [stderr]   --> src/main.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     b = "ccccc";
[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:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let a = 1;
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let a = 1;
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ans3`
[INFO] [stderr]   --> src/main.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let ans3 = 70.0 + 8.9;
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_ans3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mm`
[INFO] [stderr]   --> src/main.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let mm = match val {
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_mm`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `string`
[INFO] [stderr]   --> src/main.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let string = match unknown {
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_string`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]   --> src/main.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let m = match string {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_m`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ten`
[INFO] [stderr]   --> src/main.rs:92:9
[INFO] [stderr]    |
[INFO] [stderr] 92 |     let ten = loop {
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_ten`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `plus_one`
[INFO] [stderr]    --> src/main.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let plus_one = |x: u32| {
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_plus_one`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `plus_one`
[INFO] [stderr]    --> src/main.rs:121:9
[INFO] [stderr]     |
[INFO] [stderr] 121 |     let plus_one = move |x:u32| {
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_plus_one`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `echo`
[INFO] [stderr]    --> src/main.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn echo() {
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "c7eb36528fb32ba35a1bb5e34b59173cfd4f1b3f6fc37e60ad7c0db47d0236ad"`
[INFO] running `"docker" "rm" "-f" "c7eb36528fb32ba35a1bb5e34b59173cfd4f1b3f6fc37e60ad7c0db47d0236ad"`
[INFO] [stdout] c7eb36528fb32ba35a1bb5e34b59173cfd4f1b3f6fc37e60ad7c0db47d0236ad
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/modeverv/RustLeapYear20190604:/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] 046c9f61fe75c88a9c3e68660769e69fd29ddf9071011a09eab3fa1978a5754b
[INFO] running `"docker" "start" "-a" "046c9f61fe75c88a9c3e68660769e69fd29ddf9071011a09eab3fa1978a5754b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/leap_year20190604-0547a8705495c25b
[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" "046c9f61fe75c88a9c3e68660769e69fd29ddf9071011a09eab3fa1978a5754b"`
[INFO] running `"docker" "rm" "-f" "046c9f61fe75c88a9c3e68660769e69fd29ddf9071011a09eab3fa1978a5754b"`
[INFO] [stdout] 046c9f61fe75c88a9c3e68660769e69fd29ddf9071011a09eab3fa1978a5754b