[INFO] crate pretable 0.3.3 is already in cache
[INFO] extracting crate pretable 0.3.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/pretable/0.3.3
[INFO] extracting crate pretable 0.3.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pretable/0.3.3
[INFO] validating manifest of pretable-0.3.3 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 pretable-0.3.3 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 pretable-0.3.3
[INFO] finished frobbing pretable-0.3.3
[INFO] frobbed toml for pretable-0.3.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/pretable/0.3.3/Cargo.toml
[INFO] started frobbing pretable-0.3.3
[INFO] finished frobbing pretable-0.3.3
[INFO] frobbed toml for pretable-0.3.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pretable/0.3.3/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 pretable-0.3.3 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pretable/0.3.3:/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] 4c94b2e0a82d635272ba9b1af9858a5b21c8fee5fb63257c4a7d864d6db1f081
[INFO] running `"docker" "start" "-a" "4c94b2e0a82d635272ba9b1af9858a5b21c8fee5fb63257c4a7d864d6db1f081"`
[INFO] [stderr]    Compiling pretable v0.3.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:179:17
[INFO] [stderr]     |
[INFO] [stderr] 179 |             let mut v = v;
[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 0.51s
[INFO] running `"docker" "inspect" "4c94b2e0a82d635272ba9b1af9858a5b21c8fee5fb63257c4a7d864d6db1f081"`
[INFO] running `"docker" "rm" "-f" "4c94b2e0a82d635272ba9b1af9858a5b21c8fee5fb63257c4a7d864d6db1f081"`
[INFO] [stdout] 4c94b2e0a82d635272ba9b1af9858a5b21c8fee5fb63257c4a7d864d6db1f081
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pretable/0.3.3:/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] 74916f5f731b01b45d31d653653c9827f7b7a0d8b4276674a3cf67cc70208874
[INFO] running `"docker" "start" "-a" "74916f5f731b01b45d31d653653c9827f7b7a0d8b4276674a3cf67cc70208874"`
[INFO] [stderr]    Compiling pretable v0.3.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:179:17
[INFO] [stderr]     |
[INFO] [stderr] 179 |             let mut v = v;
[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 0.49s
[INFO] running `"docker" "inspect" "74916f5f731b01b45d31d653653c9827f7b7a0d8b4276674a3cf67cc70208874"`
[INFO] running `"docker" "rm" "-f" "74916f5f731b01b45d31d653653c9827f7b7a0d8b4276674a3cf67cc70208874"`
[INFO] [stdout] 74916f5f731b01b45d31d653653c9827f7b7a0d8b4276674a3cf67cc70208874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pretable/0.3.3:/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] dff922c274af5d9122698b7d9d923ea37a0c57382152e76adeaf2aeb43966de2
[INFO] running `"docker" "start" "-a" "dff922c274af5d9122698b7d9d923ea37a0c57382152e76adeaf2aeb43966de2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/pretable-bed461a996c08489
[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 pretable
[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" "dff922c274af5d9122698b7d9d923ea37a0c57382152e76adeaf2aeb43966de2"`
[INFO] running `"docker" "rm" "-f" "dff922c274af5d9122698b7d9d923ea37a0c57382152e76adeaf2aeb43966de2"`
[INFO] [stdout] dff922c274af5d9122698b7d9d923ea37a0c57382152e76adeaf2aeb43966de2