[INFO] updating cached repository Sirotyann/rust_hello_world
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Sirotyann/rust_hello_world
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Sirotyann/rust_hello_world" "work/ex/beta-1.38-1/sources/1.37.0/gh/Sirotyann/rust_hello_world"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Sirotyann/rust_hello_world'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Sirotyann/rust_hello_world" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Sirotyann/rust_hello_world"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Sirotyann/rust_hello_world'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 430e920ff7b5efea75795a06a5fd92213204de43
[INFO] sha for GitHub repo Sirotyann/rust_hello_world: 430e920ff7b5efea75795a06a5fd92213204de43
[INFO] validating manifest of Sirotyann/rust_hello_world 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 Sirotyann/rust_hello_world 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 Sirotyann/rust_hello_world
[INFO] finished frobbing Sirotyann/rust_hello_world
[INFO] frobbed toml for Sirotyann/rust_hello_world written to work/ex/beta-1.38-1/sources/1.37.0/gh/Sirotyann/rust_hello_world/Cargo.toml
[INFO] started frobbing Sirotyann/rust_hello_world
[INFO] finished frobbing Sirotyann/rust_hello_world
[INFO] frobbed toml for Sirotyann/rust_hello_world written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Sirotyann/rust_hello_world/Cargo.toml
[INFO] crate Sirotyann/rust_hello_world 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 Sirotyann/rust_hello_world against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Sirotyann/rust_hello_world:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 58453e5b6ec590061c5632a9b00bca81957a1dffb2d02681ade3fbc0c021ad22
[INFO] running `"docker" "start" "-a" "58453e5b6ec590061c5632a9b00bca81957a1dffb2d02681ade3fbc0c021ad22"`
[INFO] [stderr]    Compiling rust_hello_world v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/feature/cons_list.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn new() -> List {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `"docker" "inspect" "58453e5b6ec590061c5632a9b00bca81957a1dffb2d02681ade3fbc0c021ad22"`
[INFO] running `"docker" "rm" "-f" "58453e5b6ec590061c5632a9b00bca81957a1dffb2d02681ade3fbc0c021ad22"`
[INFO] [stdout] 58453e5b6ec590061c5632a9b00bca81957a1dffb2d02681ade3fbc0c021ad22
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Sirotyann/rust_hello_world:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] a7fe419c9b8e8051e205b0fed6c73d45d0cc7d0bd3585c2f410a146fece40a64
[INFO] running `"docker" "start" "-a" "a7fe419c9b8e8051e205b0fed6c73d45d0cc7d0bd3585c2f410a146fece40a64"`
[INFO] [stderr]    Compiling rust_hello_world v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/feature/cons_list.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn new() -> List {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "a7fe419c9b8e8051e205b0fed6c73d45d0cc7d0bd3585c2f410a146fece40a64"`
[INFO] running `"docker" "rm" "-f" "a7fe419c9b8e8051e205b0fed6c73d45d0cc7d0bd3585c2f410a146fece40a64"`
[INFO] [stdout] a7fe419c9b8e8051e205b0fed6c73d45d0cc7d0bd3585c2f410a146fece40a64
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Sirotyann/rust_hello_world:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 3ab2290e93d332e35627f353a4d35f001490f91c6f4db463f320cf1ebd1a283a
[INFO] running `"docker" "start" "-a" "3ab2290e93d332e35627f353a4d35f001490f91c6f4db463f320cf1ebd1a283a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_hello_world-4b7e691bacca8529
[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" "3ab2290e93d332e35627f353a4d35f001490f91c6f4db463f320cf1ebd1a283a"`
[INFO] running `"docker" "rm" "-f" "3ab2290e93d332e35627f353a4d35f001490f91c6f4db463f320cf1ebd1a283a"`
[INFO] [stdout] 3ab2290e93d332e35627f353a4d35f001490f91c6f4db463f320cf1ebd1a283a