[INFO] crate imprint 0.2.0 is already in cache
[INFO] extracting crate imprint 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/imprint/0.2.0
[INFO] extracting crate imprint 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/imprint/0.2.0
[INFO] validating manifest of imprint-0.2.0 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 imprint-0.2.0 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 imprint-0.2.0
[INFO] finished frobbing imprint-0.2.0
[INFO] frobbed toml for imprint-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/imprint/0.2.0/Cargo.toml
[INFO] started frobbing imprint-0.2.0
[INFO] finished frobbing imprint-0.2.0
[INFO] frobbed toml for imprint-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/imprint/0.2.0/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing imprint-0.2.0 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/imprint/0.2.0:/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] b39052b2b08ef190aa2e83d8b15e7cb88cad46f28bd32422c40183b9f48d022c
[INFO] running `"docker" "start" "-a" "b39052b2b08ef190aa2e83d8b15e7cb88cad46f28bd32422c40183b9f48d022c"`
[INFO] [stderr]    Compiling imprint v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `mem` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:427:19
[INFO] [stderr]     |
[INFO] [stderr] 22  | use std::{fmt, mem};
[INFO] [stderr]     |                --- the item `mem` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 427 |         use std::{mem, ptr};
[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" "b39052b2b08ef190aa2e83d8b15e7cb88cad46f28bd32422c40183b9f48d022c"`
[INFO] running `"docker" "rm" "-f" "b39052b2b08ef190aa2e83d8b15e7cb88cad46f28bd32422c40183b9f48d022c"`
[INFO] [stdout] b39052b2b08ef190aa2e83d8b15e7cb88cad46f28bd32422c40183b9f48d022c
[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/reg/imprint/0.2.0:/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] 38d97496f6107674f5219d0f72471f9a2cc04026f358e621f427f427bb7a778a
[INFO] running `"docker" "start" "-a" "38d97496f6107674f5219d0f72471f9a2cc04026f358e621f427f427bb7a778a"`
[INFO] [stderr]    Compiling imprint v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `mem` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:427:19
[INFO] [stderr]     |
[INFO] [stderr] 22  | use std::{fmt, mem};
[INFO] [stderr]     |                --- the item `mem` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 427 |         use std::{mem, ptr};
[INFO] [stderr]     |                   ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.69s
[INFO] running `"docker" "inspect" "38d97496f6107674f5219d0f72471f9a2cc04026f358e621f427f427bb7a778a"`
[INFO] running `"docker" "rm" "-f" "38d97496f6107674f5219d0f72471f9a2cc04026f358e621f427f427bb7a778a"`
[INFO] [stdout] 38d97496f6107674f5219d0f72471f9a2cc04026f358e621f427f427bb7a778a
[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/reg/imprint/0.2.0:/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] b3ab857ba6defe21b8f2e0e7b3f0d7b147ea222bd96029ee0f69fb970177ad20
[INFO] running `"docker" "start" "-a" "b3ab857ba6defe21b8f2e0e7b3f0d7b147ea222bd96029ee0f69fb970177ad20"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/imprint-b9687204cf342fae
[INFO] [stdout] running 4 tests
[INFO] [stdout] test arith::tests::it_works ... ok
[INFO] [stdout] test ix::tests::it_works ... ok
[INFO] [stdout] test tests::exists ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests imprint
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/lib.rs - TyEq<T, U>::apply (line 230) ... ok
[INFO] [stdout] test src/lib.rs - TyEq (line 177) ... ok
[INFO] [stdout] test src/lib.rs - IdF (line 340) ... ok
[INFO] [stdout] test src/lib.rs - imprint (line 49) ... ok
[INFO] [stdout] test src/lib.rs - TyFn (line 322) ... ok
[INFO] [stdout] test src/lib.rs - imprint (line 57) ... ok
[INFO] [stdout] test src/lib.rs - TyEq<T, U>::apply (line 241) ... ok
[INFO] [stdout] test src/lib.rs - Exists (line 390) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b3ab857ba6defe21b8f2e0e7b3f0d7b147ea222bd96029ee0f69fb970177ad20"`
[INFO] running `"docker" "rm" "-f" "b3ab857ba6defe21b8f2e0e7b3f0d7b147ea222bd96029ee0f69fb970177ad20"`
[INFO] [stdout] b3ab857ba6defe21b8f2e0e7b3f0d7b147ea222bd96029ee0f69fb970177ad20