[INFO] updating cached repository notryanb/scrap_iron
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/notryanb/scrap_iron
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/notryanb/scrap_iron" "work/ex/beta-1.38-1/sources/1.37.0/gh/notryanb/scrap_iron"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/notryanb/scrap_iron'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/notryanb/scrap_iron" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/notryanb/scrap_iron"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/notryanb/scrap_iron'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c6038f94f40702cdaf7aafd593ce3400bef11b56
[INFO] sha for GitHub repo notryanb/scrap_iron: c6038f94f40702cdaf7aafd593ce3400bef11b56
[INFO] validating manifest of notryanb/scrap_iron 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 notryanb/scrap_iron 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 notryanb/scrap_iron
[INFO] finished frobbing notryanb/scrap_iron
[INFO] frobbed toml for notryanb/scrap_iron written to work/ex/beta-1.38-1/sources/1.37.0/gh/notryanb/scrap_iron/Cargo.toml
[INFO] started frobbing notryanb/scrap_iron
[INFO] finished frobbing notryanb/scrap_iron
[INFO] frobbed toml for notryanb/scrap_iron written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/notryanb/scrap_iron/Cargo.toml
[INFO] crate notryanb/scrap_iron 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 notryanb/scrap_iron 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/notryanb/scrap_iron:/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] 2f92c61823a9d12db1fce9e28e1c3f7244ba9c548c84199b9999b4949996603e
[INFO] running `"docker" "start" "-a" "2f92c61823a9d12db1fce9e28e1c3f7244ba9c548c84199b9999b4949996603e"`
[INFO] [stderr]    Compiling rust-server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     f.read_to_string(&mut response);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "2f92c61823a9d12db1fce9e28e1c3f7244ba9c548c84199b9999b4949996603e"`
[INFO] running `"docker" "rm" "-f" "2f92c61823a9d12db1fce9e28e1c3f7244ba9c548c84199b9999b4949996603e"`
[INFO] [stdout] 2f92c61823a9d12db1fce9e28e1c3f7244ba9c548c84199b9999b4949996603e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/notryanb/scrap_iron:/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] 7471d219d7cbd16c34cf340e8289c0e256cfdd349a419786808070ca9b5f0673
[INFO] running `"docker" "start" "-a" "7471d219d7cbd16c34cf340e8289c0e256cfdd349a419786808070ca9b5f0673"`
[INFO] [stderr]    Compiling rust-server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     f.read_to_string(&mut response);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "7471d219d7cbd16c34cf340e8289c0e256cfdd349a419786808070ca9b5f0673"`
[INFO] running `"docker" "rm" "-f" "7471d219d7cbd16c34cf340e8289c0e256cfdd349a419786808070ca9b5f0673"`
[INFO] [stdout] 7471d219d7cbd16c34cf340e8289c0e256cfdd349a419786808070ca9b5f0673
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/notryanb/scrap_iron:/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] 314f6999494c963ca171de6bea515a5e0f1fe6598232536db6171b6fe75ed4ea
[INFO] running `"docker" "start" "-a" "314f6999494c963ca171de6bea515a5e0f1fe6598232536db6171b6fe75ed4ea"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_server-8caa624920ff9797
[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" "314f6999494c963ca171de6bea515a5e0f1fe6598232536db6171b6fe75ed4ea"`
[INFO] running `"docker" "rm" "-f" "314f6999494c963ca171de6bea515a5e0f1fe6598232536db6171b6fe75ed4ea"`
[INFO] [stdout] 314f6999494c963ca171de6bea515a5e0f1fe6598232536db6171b6fe75ed4ea