[INFO] crate cargo-shim 0.2.0 is already in cache
[INFO] extracting crate cargo-shim 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/cargo-shim/0.2.0
[INFO] extracting crate cargo-shim 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cargo-shim/0.2.0
[INFO] validating manifest of cargo-shim-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 cargo-shim-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 cargo-shim-0.2.0
[INFO] finished frobbing cargo-shim-0.2.0
[INFO] frobbed toml for cargo-shim-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/cargo-shim/0.2.0/Cargo.toml
[INFO] started frobbing cargo-shim-0.2.0
[INFO] finished frobbing cargo-shim-0.2.0
[INFO] frobbed toml for cargo-shim-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cargo-shim/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] testing cargo-shim-0.2.0 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-7/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/cargo-shim/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5a1808496d84d8e0d77518288a7b808f0fa5bca06309827ced375eb92d639480
[INFO] running `"docker" "start" "-a" "5a1808496d84d8e0d77518288a7b808f0fa5bca06309827ced375eb92d639480"`
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]    Compiling cargo-shim v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:886:13
[INFO] [stderr]     |
[INFO] [stderr] 886 |         for mut artifact in artifacts {
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.08s
[INFO] running `"docker" "inspect" "5a1808496d84d8e0d77518288a7b808f0fa5bca06309827ced375eb92d639480"`
[INFO] running `"docker" "rm" "-f" "5a1808496d84d8e0d77518288a7b808f0fa5bca06309827ced375eb92d639480"`
[INFO] [stdout] 5a1808496d84d8e0d77518288a7b808f0fa5bca06309827ced375eb92d639480
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/cargo-shim/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] e0208735790b65c5e6ee518375662c63eaf7c34116a63665af17996b0fa817a4
[INFO] running `"docker" "start" "-a" "e0208735790b65c5e6ee518375662c63eaf7c34116a63665af17996b0fa817a4"`
[INFO] [stderr]    Compiling cargo-shim v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:886:13
[INFO] [stderr]     |
[INFO] [stderr] 886 |         for mut artifact in artifacts {
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.14s
[INFO] running `"docker" "inspect" "e0208735790b65c5e6ee518375662c63eaf7c34116a63665af17996b0fa817a4"`
[INFO] running `"docker" "rm" "-f" "e0208735790b65c5e6ee518375662c63eaf7c34116a63665af17996b0fa817a4"`
[INFO] [stdout] e0208735790b65c5e6ee518375662c63eaf7c34116a63665af17996b0fa817a4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/cargo-shim/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] efbf759afebc55f8cb0807ed3f6cf552cacf121d50612cfc46921842cbe0f9fa
[INFO] running `"docker" "start" "-a" "efbf759afebc55f8cb0807ed3f6cf552cacf121d50612cfc46921842cbe0f9fa"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cargo_shim-9a4d1991f99f4bf8
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test diagnostic_formatter::test_long_multiline ... ok
[INFO] [stdout] test diagnostic_formatter::test_basic_multiline ... ok
[INFO] [stdout] test diagnostic_formatter::test_basic_error ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cargo-shim
[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" "efbf759afebc55f8cb0807ed3f6cf552cacf121d50612cfc46921842cbe0f9fa"`
[INFO] running `"docker" "rm" "-f" "efbf759afebc55f8cb0807ed3f6cf552cacf121d50612cfc46921842cbe0f9fa"`
[INFO] [stdout] efbf759afebc55f8cb0807ed3f6cf552cacf121d50612cfc46921842cbe0f9fa