[INFO] updating cached repository yatendernitk/rust-codes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yatendernitk/rust-codes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yatendernitk/rust-codes" "work/ex/beta-1.37-6/sources/1.36.0/gh/yatendernitk/rust-codes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/yatendernitk/rust-codes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yatendernitk/rust-codes" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yatendernitk/rust-codes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yatendernitk/rust-codes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 755d3eddb18c6ff16f72187ae9a861d93c7da5f3
[INFO] sha for GitHub repo yatendernitk/rust-codes: 755d3eddb18c6ff16f72187ae9a861d93c7da5f3
[INFO] validating manifest of yatendernitk/rust-codes on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of yatendernitk/rust-codes on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing yatendernitk/rust-codes
[INFO] finished frobbing yatendernitk/rust-codes
[INFO] frobbed toml for yatendernitk/rust-codes written to work/ex/beta-1.37-6/sources/1.36.0/gh/yatendernitk/rust-codes/Cargo.toml
[INFO] started frobbing yatendernitk/rust-codes
[INFO] finished frobbing yatendernitk/rust-codes
[INFO] frobbed toml for yatendernitk/rust-codes written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/yatendernitk/rust-codes/Cargo.toml
[INFO] crate yatendernitk/rust-codes already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing yatendernitk/rust-codes against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/yatendernitk/rust-codes:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 482dc9a6c9872e2f02b44520825d53e607f1d137b0d7cbf0130b838f460ad0ed
[INFO] running `"docker" "start" "-a" "482dc9a6c9872e2f02b44520825d53e607f1d137b0d7cbf0130b838f460ad0ed"`
[INFO] [stderr]    Compiling libc v0.2.32
[INFO] [stderr]    Compiling rand v0.3.17
[INFO] [stderr]    Compiling hello v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let mut guess: u32 = match guess.trim().parse() {
[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: function is never used: `guessing`
[INFO] [stderr]   --> src/main.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn guessing() {
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.61s
[INFO] running `"docker" "inspect" "482dc9a6c9872e2f02b44520825d53e607f1d137b0d7cbf0130b838f460ad0ed"`
[INFO] running `"docker" "rm" "-f" "482dc9a6c9872e2f02b44520825d53e607f1d137b0d7cbf0130b838f460ad0ed"`
[INFO] [stdout] 482dc9a6c9872e2f02b44520825d53e607f1d137b0d7cbf0130b838f460ad0ed
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/yatendernitk/rust-codes:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0b9572d3e0a5a307e08096bfb6bf8308c8629b305c62d24e44137ca11ee9a283
[INFO] running `"docker" "start" "-a" "0b9572d3e0a5a307e08096bfb6bf8308c8629b305c62d24e44137ca11ee9a283"`
[INFO] [stderr]    Compiling hello v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let mut guess: u32 = match guess.trim().parse() {
[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: function is never used: `guessing`
[INFO] [stderr]   --> src/main.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn guessing() {
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "0b9572d3e0a5a307e08096bfb6bf8308c8629b305c62d24e44137ca11ee9a283"`
[INFO] running `"docker" "rm" "-f" "0b9572d3e0a5a307e08096bfb6bf8308c8629b305c62d24e44137ca11ee9a283"`
[INFO] [stdout] 0b9572d3e0a5a307e08096bfb6bf8308c8629b305c62d24e44137ca11ee9a283
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/yatendernitk/rust-codes:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 8c18d6df75df9ff63c6197de9bc26d5ff513c96ca9356453f0b299a22662a1c3
[INFO] running `"docker" "start" "-a" "8c18d6df75df9ff63c6197de9bc26d5ff513c96ca9356453f0b299a22662a1c3"`
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello-146cfc2bff80e7ba
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "8c18d6df75df9ff63c6197de9bc26d5ff513c96ca9356453f0b299a22662a1c3"`
[INFO] running `"docker" "rm" "-f" "8c18d6df75df9ff63c6197de9bc26d5ff513c96ca9356453f0b299a22662a1c3"`
[INFO] [stdout] 8c18d6df75df9ff63c6197de9bc26d5ff513c96ca9356453f0b299a22662a1c3