[INFO] updating cached repository killercup/rust-cheat-sheet
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/killercup/rust-cheat-sheet
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/killercup/rust-cheat-sheet" "work/ex/beta-1.38-1/sources/1.37.0/gh/killercup/rust-cheat-sheet"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/killercup/rust-cheat-sheet'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/killercup/rust-cheat-sheet" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/killercup/rust-cheat-sheet"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/killercup/rust-cheat-sheet'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d4705136cd5a38a459017f1168e0c0c411956a31
[INFO] sha for GitHub repo killercup/rust-cheat-sheet: d4705136cd5a38a459017f1168e0c0c411956a31
[INFO] validating manifest of killercup/rust-cheat-sheet 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 killercup/rust-cheat-sheet 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 killercup/rust-cheat-sheet
[INFO] finished frobbing killercup/rust-cheat-sheet
[INFO] frobbed toml for killercup/rust-cheat-sheet written to work/ex/beta-1.38-1/sources/1.37.0/gh/killercup/rust-cheat-sheet/Cargo.toml
[INFO] started frobbing killercup/rust-cheat-sheet
[INFO] finished frobbing killercup/rust-cheat-sheet
[INFO] frobbed toml for killercup/rust-cheat-sheet written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/killercup/rust-cheat-sheet/Cargo.toml
[INFO] crate killercup/rust-cheat-sheet 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] [stderr]     Blocking waiting for file lock on package cache
[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 killercup/rust-cheat-sheet 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/killercup/rust-cheat-sheet:/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] 7aeb49b15c9e2ff53e511e87bb76f7f2d2092d5f4523dd1bc993bc843aa122bb
[INFO] running `"docker" "start" "-a" "7aeb49b15c9e2ff53e511e87bb76f7f2d2092d5f4523dd1bc993bc843aa122bb"`
[INFO] [stderr]    Compiling rust101 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> cheat-sheet.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let x = 1;                 // `x` is now `1` (a 32bit integer, `i32`)
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `y` is assigned to, but never used
[INFO] [stderr]   --> cheat-sheet.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut y = 2;             // A mutable binding: We can change this value
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_y` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]   --> cheat-sheet.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     y += 1;                    // Add 1 to `y`, making it 3
[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: `x`
[INFO] [stderr]   --> cheat-sheet.rs:70:22
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn this_consumes(x: String) -> String {
[INFO] [stderr]    |                      ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> cheat-sheet.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         fn new(name: &str, age: u16) -> Person {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "7aeb49b15c9e2ff53e511e87bb76f7f2d2092d5f4523dd1bc993bc843aa122bb"`
[INFO] running `"docker" "rm" "-f" "7aeb49b15c9e2ff53e511e87bb76f7f2d2092d5f4523dd1bc993bc843aa122bb"`
[INFO] [stdout] 7aeb49b15c9e2ff53e511e87bb76f7f2d2092d5f4523dd1bc993bc843aa122bb
[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/killercup/rust-cheat-sheet:/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] 4c711a62dff226fe0d5694bcb68c12a3e7ca2dfe58e47a8bbe8d32395790f0d0
[INFO] running `"docker" "start" "-a" "4c711a62dff226fe0d5694bcb68c12a3e7ca2dfe58e47a8bbe8d32395790f0d0"`
[INFO] [stderr]    Compiling rust101 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> cheat-sheet.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let x = 1;                 // `x` is now `1` (a 32bit integer, `i32`)
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `y` is assigned to, but never used
[INFO] [stderr]   --> cheat-sheet.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut y = 2;             // A mutable binding: We can change this value
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_y` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]   --> cheat-sheet.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     y += 1;                    // Add 1 to `y`, making it 3
[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: `x`
[INFO] [stderr]   --> cheat-sheet.rs:70:22
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn this_consumes(x: String) -> String {
[INFO] [stderr]    |                      ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> cheat-sheet.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         fn new(name: &str, age: u16) -> Person {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "4c711a62dff226fe0d5694bcb68c12a3e7ca2dfe58e47a8bbe8d32395790f0d0"`
[INFO] running `"docker" "rm" "-f" "4c711a62dff226fe0d5694bcb68c12a3e7ca2dfe58e47a8bbe8d32395790f0d0"`
[INFO] [stdout] 4c711a62dff226fe0d5694bcb68c12a3e7ca2dfe58e47a8bbe8d32395790f0d0
[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/killercup/rust-cheat-sheet:/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] 02adc3034746da5513a3e628f3306a00859e6968b69a49702ee48f424353a217
[INFO] running `"docker" "start" "-a" "02adc3034746da5513a3e628f3306a00859e6968b69a49702ee48f424353a217"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cheat_sheet-8b286bb9519c100f
[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" "02adc3034746da5513a3e628f3306a00859e6968b69a49702ee48f424353a217"`
[INFO] running `"docker" "rm" "-f" "02adc3034746da5513a3e628f3306a00859e6968b69a49702ee48f424353a217"`
[INFO] [stdout] 02adc3034746da5513a3e628f3306a00859e6968b69a49702ee48f424353a217