[INFO] crate crc32c 0.4.0 is already in cache
[INFO] extracting crate crc32c 0.4.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/crc32c/0.4.0
[INFO] extracting crate crc32c 0.4.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/crc32c/0.4.0
[INFO] validating manifest of crc32c-0.4.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of crc32c-0.4.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/reg/crc32c/0.4.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing crc32c-0.4.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] d310ece0f5078398f9c45493a7f4f03ae9ee7695801ee93c49a2d1adc8c1927c
[INFO] running `"docker" "start" "-a" "d310ece0f5078398f9c45493a7f4f03ae9ee7695801ee93c49a2d1adc8c1927c"`
[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 1.18s
[INFO] running `"docker" "inspect" "d310ece0f5078398f9c45493a7f4f03ae9ee7695801ee93c49a2d1adc8c1927c"`
[INFO] running `"docker" "rm" "-f" "d310ece0f5078398f9c45493a7f4f03ae9ee7695801ee93c49a2d1adc8c1927c"`
[INFO] [stdout] d310ece0f5078398f9c45493a7f4f03ae9ee7695801ee93c49a2d1adc8c1927c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] d5bfbf56c3f4701932c37d9cfb40e379f5ff5de8a39d65d2060bbfaafa8bc1be
[INFO] running `"docker" "start" "-a" "d5bfbf56c3f4701932c37d9cfb40e379f5ff5de8a39d65d2060bbfaafa8bc1be"`
[INFO] [stderr]    Compiling crc32c v0.4.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "d5bfbf56c3f4701932c37d9cfb40e379f5ff5de8a39d65d2060bbfaafa8bc1be"`
[INFO] running `"docker" "rm" "-f" "d5bfbf56c3f4701932c37d9cfb40e379f5ff5de8a39d65d2060bbfaafa8bc1be"`
[INFO] [stdout] d5bfbf56c3f4701932c37d9cfb40e379f5ff5de8a39d65d2060bbfaafa8bc1be
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 897e94ae96d992f3312c88b10d0d895eaf23f195b333067ae68fab03cba65feb
[INFO] running `"docker" "start" "-a" "897e94ae96d992f3312c88b10d0d895eaf23f195b333067ae68fab03cba65feb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/crc32c-ce490bef1e1799d0
[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" "897e94ae96d992f3312c88b10d0d895eaf23f195b333067ae68fab03cba65feb"`
[INFO] running `"docker" "rm" "-f" "897e94ae96d992f3312c88b10d0d895eaf23f195b333067ae68fab03cba65feb"`
[INFO] [stdout] 897e94ae96d992f3312c88b10d0d895eaf23f195b333067ae68fab03cba65feb