[INFO] crate rm-improved 0.12.0 is already in cache
[INFO] extracting crate rm-improved 0.12.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/rm-improved/0.12.0
[INFO] extracting crate rm-improved 0.12.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rm-improved/0.12.0
[INFO] validating manifest of rm-improved-0.12.0 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 rm-improved-0.12.0 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 rm-improved-0.12.0
[INFO] finished frobbing rm-improved-0.12.0
[INFO] frobbed toml for rm-improved-0.12.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rm-improved/0.12.0/Cargo.toml
[INFO] started frobbing rm-improved-0.12.0
[INFO] finished frobbing rm-improved-0.12.0
[INFO] frobbed toml for rm-improved-0.12.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rm-improved/0.12.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 rm-improved-0.12.0 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/reg/rm-improved/0.12.0:/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] 4a3eb38da3997933a1e668dc5d6d6f5e36dba43176a6f1c9437b7373d8e350d2
[INFO] running `"docker" "start" "-a" "4a3eb38da3997933a1e668dc5d6d6f5e36dba43176a6f1c9437b7373d8e350d2"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/main.rs` was erroneously implicitly accepted for binary `rip`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]    Compiling rm-improved v0.12.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/main.rs:247:25
[INFO] [stderr]     |
[INFO] [stderr] 247 |                         fs::remove_dir_all(dest).is_ok();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.13s
[INFO] running `"docker" "inspect" "4a3eb38da3997933a1e668dc5d6d6f5e36dba43176a6f1c9437b7373d8e350d2"`
[INFO] running `"docker" "rm" "-f" "4a3eb38da3997933a1e668dc5d6d6f5e36dba43176a6f1c9437b7373d8e350d2"`
[INFO] [stdout] 4a3eb38da3997933a1e668dc5d6d6f5e36dba43176a6f1c9437b7373d8e350d2
[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/reg/rm-improved/0.12.0:/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] 941a85a3d42d845d15ea66a567ae3830a54f7f2e85edff320230a4418070e81e
[INFO] running `"docker" "start" "-a" "941a85a3d42d845d15ea66a567ae3830a54f7f2e85edff320230a4418070e81e"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/main.rs` was erroneously implicitly accepted for binary `rip`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rm-improved v0.12.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/main.rs:247:25
[INFO] [stderr]     |
[INFO] [stderr] 247 |                         fs::remove_dir_all(dest).is_ok();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "941a85a3d42d845d15ea66a567ae3830a54f7f2e85edff320230a4418070e81e"`
[INFO] running `"docker" "rm" "-f" "941a85a3d42d845d15ea66a567ae3830a54f7f2e85edff320230a4418070e81e"`
[INFO] [stdout] 941a85a3d42d845d15ea66a567ae3830a54f7f2e85edff320230a4418070e81e
[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/reg/rm-improved/0.12.0:/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] 44e000cbeea1608f2ece504d7f531c72d0d38d6289623cb00908b172c68816fd
[INFO] running `"docker" "start" "-a" "44e000cbeea1608f2ece504d7f531c72d0d38d6289623cb00908b172c68816fd"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/main.rs` was erroneously implicitly accepted for binary `rip`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rip-0e96fc9855e59b7d
[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" "44e000cbeea1608f2ece504d7f531c72d0d38d6289623cb00908b172c68816fd"`
[INFO] running `"docker" "rm" "-f" "44e000cbeea1608f2ece504d7f531c72d0d38d6289623cb00908b172c68816fd"`
[INFO] [stdout] 44e000cbeea1608f2ece504d7f531c72d0d38d6289623cb00908b172c68816fd