[INFO] crate crc32c 0.4.0 is already in cache
[INFO] extracting crate crc32c 0.4.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/crc32c/0.4.0
[INFO] extracting crate crc32c 0.4.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/crc32c/0.4.0
[INFO] validating manifest of crc32c-0.4.0 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 crc32c-0.4.0 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 crc32c-0.4.0
[INFO] finished frobbing crc32c-0.4.0
[INFO] frobbed toml for crc32c-0.4.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/crc32c/0.4.0/Cargo.toml
[INFO] started frobbing crc32c-0.4.0
[INFO] finished frobbing crc32c-0.4.0
[INFO] frobbed toml for crc32c-0.4.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/crc32c/0.4.0/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 crc32c-0.4.0 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/crc32c/0.4.0:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 9da44c94ef9122f2a22fb4d0ab4eb1718adba5910d7bb7f70b21c61783ae1500
[INFO] running `"docker" "start" "-a" "9da44c94ef9122f2a22fb4d0ab4eb1718adba5910d7bb7f70b21c61783ae1500"`
[INFO] [stderr]    Compiling crc32c v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `mem` is imported redundantly
[INFO] [stderr]  --> build.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{mem, ops};
[INFO] [stderr]   |           --- the item `mem` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 8 |     use std::mem;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "9da44c94ef9122f2a22fb4d0ab4eb1718adba5910d7bb7f70b21c61783ae1500"`
[INFO] running `"docker" "rm" "-f" "9da44c94ef9122f2a22fb4d0ab4eb1718adba5910d7bb7f70b21c61783ae1500"`
[INFO] [stdout] 9da44c94ef9122f2a22fb4d0ab4eb1718adba5910d7bb7f70b21c61783ae1500
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/crc32c/0.4.0:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2195ecf9f9fc9c0d620879834e97456b1b28103566539159b49e128ecb2e1351
[INFO] running `"docker" "start" "-a" "2195ecf9f9fc9c0d620879834e97456b1b28103566539159b49e128ecb2e1351"`
[INFO] [stderr]    Compiling crc32c v0.4.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `"docker" "inspect" "2195ecf9f9fc9c0d620879834e97456b1b28103566539159b49e128ecb2e1351"`
[INFO] running `"docker" "rm" "-f" "2195ecf9f9fc9c0d620879834e97456b1b28103566539159b49e128ecb2e1351"`
[INFO] [stdout] 2195ecf9f9fc9c0d620879834e97456b1b28103566539159b49e128ecb2e1351
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/crc32c/0.4.0:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 4ee26b35340867fb30350846130e71da63b19e996236a82eabbd6dec1bc1771a
[INFO] running `"docker" "start" "-a" "4ee26b35340867fb30350846130e71da63b19e996236a82eabbd6dec1bc1771a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/crc32c-d80e2e62a4e4f1a8
[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] [stderr]    Doc-tests crc32c
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 7) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4ee26b35340867fb30350846130e71da63b19e996236a82eabbd6dec1bc1771a"`
[INFO] running `"docker" "rm" "-f" "4ee26b35340867fb30350846130e71da63b19e996236a82eabbd6dec1bc1771a"`
[INFO] [stdout] 4ee26b35340867fb30350846130e71da63b19e996236a82eabbd6dec1bc1771a