[INFO] updating cached repository Vaiklol/rust_calculator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Vaiklol/rust_calculator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Vaiklol/rust_calculator" "work/ex/beta-1.38-1/sources/1.37.0/gh/Vaiklol/rust_calculator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Vaiklol/rust_calculator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Vaiklol/rust_calculator" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Vaiklol/rust_calculator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Vaiklol/rust_calculator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6cae7593a813daf9b79b912caf3f45b8aa7360b8
[INFO] sha for GitHub repo Vaiklol/rust_calculator: 6cae7593a813daf9b79b912caf3f45b8aa7360b8
[INFO] validating manifest of Vaiklol/rust_calculator 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 Vaiklol/rust_calculator 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 Vaiklol/rust_calculator
[INFO] finished frobbing Vaiklol/rust_calculator
[INFO] frobbed toml for Vaiklol/rust_calculator written to work/ex/beta-1.38-1/sources/1.37.0/gh/Vaiklol/rust_calculator/Cargo.toml
[INFO] started frobbing Vaiklol/rust_calculator
[INFO] finished frobbing Vaiklol/rust_calculator
[INFO] frobbed toml for Vaiklol/rust_calculator written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Vaiklol/rust_calculator/Cargo.toml
[INFO] crate Vaiklol/rust_calculator 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] [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 Vaiklol/rust_calculator 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/Vaiklol/rust_calculator:/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] daad28a0502cdfc1a7e200a978dffc260df3b019a3d4e543d6514227e4ff41b2
[INFO] running `"docker" "start" "-a" "daad28a0502cdfc1a7e200a978dffc260df3b019a3d4e543d6514227e4ff41b2"`
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling untitled3 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.88s
[INFO] running `"docker" "inspect" "daad28a0502cdfc1a7e200a978dffc260df3b019a3d4e543d6514227e4ff41b2"`
[INFO] running `"docker" "rm" "-f" "daad28a0502cdfc1a7e200a978dffc260df3b019a3d4e543d6514227e4ff41b2"`
[INFO] [stdout] daad28a0502cdfc1a7e200a978dffc260df3b019a3d4e543d6514227e4ff41b2
[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/Vaiklol/rust_calculator:/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] 683099e9aba9c14c319f81ef80afe5851e0fade2fcae584b15539a6e0b2de91c
[INFO] running `"docker" "start" "-a" "683099e9aba9c14c319f81ef80afe5851e0fade2fcae584b15539a6e0b2de91c"`
[INFO] [stderr]    Compiling untitled3 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "683099e9aba9c14c319f81ef80afe5851e0fade2fcae584b15539a6e0b2de91c"`
[INFO] running `"docker" "rm" "-f" "683099e9aba9c14c319f81ef80afe5851e0fade2fcae584b15539a6e0b2de91c"`
[INFO] [stdout] 683099e9aba9c14c319f81ef80afe5851e0fade2fcae584b15539a6e0b2de91c
[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/Vaiklol/rust_calculator:/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] 517f167c5faa41bd15ed1f132bbff1a8baed01e32e174a6399ad09f64d45b0a8
[INFO] running `"docker" "start" "-a" "517f167c5faa41bd15ed1f132bbff1a8baed01e32e174a6399ad09f64d45b0a8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/untitled3-c118b810078a8c4f
[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" "517f167c5faa41bd15ed1f132bbff1a8baed01e32e174a6399ad09f64d45b0a8"`
[INFO] running `"docker" "rm" "-f" "517f167c5faa41bd15ed1f132bbff1a8baed01e32e174a6399ad09f64d45b0a8"`
[INFO] [stdout] 517f167c5faa41bd15ed1f132bbff1a8baed01e32e174a6399ad09f64d45b0a8