[INFO] updating cached repository sepiropht/rust-error-handling
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sepiropht/rust-error-handling
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sepiropht/rust-error-handling" "work/ex/beta-1.38-1/sources/1.37.0/gh/sepiropht/rust-error-handling"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sepiropht/rust-error-handling'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sepiropht/rust-error-handling" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sepiropht/rust-error-handling"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sepiropht/rust-error-handling'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 39f9a5a3cd92eb48ce7035bceb0e6c22d3adcae5
[INFO] sha for GitHub repo sepiropht/rust-error-handling: 39f9a5a3cd92eb48ce7035bceb0e6c22d3adcae5
[INFO] validating manifest of sepiropht/rust-error-handling 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 sepiropht/rust-error-handling 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 sepiropht/rust-error-handling
[INFO] finished frobbing sepiropht/rust-error-handling
[INFO] frobbed toml for sepiropht/rust-error-handling written to work/ex/beta-1.38-1/sources/1.37.0/gh/sepiropht/rust-error-handling/Cargo.toml
[INFO] started frobbing sepiropht/rust-error-handling
[INFO] finished frobbing sepiropht/rust-error-handling
[INFO] frobbed toml for sepiropht/rust-error-handling written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sepiropht/rust-error-handling/Cargo.toml
[INFO] crate sepiropht/rust-error-handling 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 sepiropht/rust-error-handling 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sepiropht/rust-error-handling:/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] b93b5194c8becdf10224d9b8f9ba9c3b92aadd9b63051f6072b06384b0d6eb2b
[INFO] running `"docker" "start" "-a" "b93b5194c8becdf10224d9b8f9ba9c3b92aadd9b63051f6072b06384b0d6eb2b"`
[INFO] [stderr]    Compiling rust-error-handling v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "b93b5194c8becdf10224d9b8f9ba9c3b92aadd9b63051f6072b06384b0d6eb2b"`
[INFO] running `"docker" "rm" "-f" "b93b5194c8becdf10224d9b8f9ba9c3b92aadd9b63051f6072b06384b0d6eb2b"`
[INFO] [stdout] b93b5194c8becdf10224d9b8f9ba9c3b92aadd9b63051f6072b06384b0d6eb2b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sepiropht/rust-error-handling:/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] b9aa4b1bcce081c04dd7dd04fadc0e21a61da9b5d1bb6d37a0ef083829a58a10
[INFO] running `"docker" "start" "-a" "b9aa4b1bcce081c04dd7dd04fadc0e21a61da9b5d1bb6d37a0ef083829a58a10"`
[INFO] [stderr]    Compiling rust-error-handling v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "b9aa4b1bcce081c04dd7dd04fadc0e21a61da9b5d1bb6d37a0ef083829a58a10"`
[INFO] running `"docker" "rm" "-f" "b9aa4b1bcce081c04dd7dd04fadc0e21a61da9b5d1bb6d37a0ef083829a58a10"`
[INFO] [stdout] b9aa4b1bcce081c04dd7dd04fadc0e21a61da9b5d1bb6d37a0ef083829a58a10
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sepiropht/rust-error-handling:/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] eff42dfc2dd70e8d7ee1ac280b80c8b2a53c62da263ea5460006829a4de9db6f
[INFO] running `"docker" "start" "-a" "eff42dfc2dd70e8d7ee1ac280b80c8b2a53c62da263ea5460006829a4de9db6f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_error_handling-21612c5778380dce
[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" "eff42dfc2dd70e8d7ee1ac280b80c8b2a53c62da263ea5460006829a4de9db6f"`
[INFO] running `"docker" "rm" "-f" "eff42dfc2dd70e8d7ee1ac280b80c8b2a53c62da263ea5460006829a4de9db6f"`
[INFO] [stdout] eff42dfc2dd70e8d7ee1ac280b80c8b2a53c62da263ea5460006829a4de9db6f