[INFO] crate jcong_minigrep 0.1.0 is already in cache
[INFO] extracting crate jcong_minigrep 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/jcong_minigrep/0.1.0
[INFO] extracting crate jcong_minigrep 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/jcong_minigrep/0.1.0
[INFO] validating manifest of jcong_minigrep-0.1.0 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 jcong_minigrep-0.1.0 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 jcong_minigrep-0.1.0
[INFO] finished frobbing jcong_minigrep-0.1.0
[INFO] frobbed toml for jcong_minigrep-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/jcong_minigrep/0.1.0/Cargo.toml
[INFO] started frobbing jcong_minigrep-0.1.0
[INFO] finished frobbing jcong_minigrep-0.1.0
[INFO] frobbed toml for jcong_minigrep-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/jcong_minigrep/0.1.0/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] [stderr]     Blocking waiting for file lock on package cache lock
[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 jcong_minigrep-0.1.0 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-4/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/jcong_minigrep/0.1.0:/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] edf893ddc5b4de8a81b0620d4e9d4f0ecae786d2d7e667312fecec5425ce8fdd
[INFO] running `"docker" "start" "-a" "edf893ddc5b4de8a81b0620d4e9d4f0ecae786d2d7e667312fecec5425ce8fdd"`
[INFO] [stderr]    Compiling jcong_minigrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]  --> src/lib.rs:1:21
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fs::{self, File};
[INFO] [stderr]   |                     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]  --> src/lib.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "edf893ddc5b4de8a81b0620d4e9d4f0ecae786d2d7e667312fecec5425ce8fdd"`
[INFO] running `"docker" "rm" "-f" "edf893ddc5b4de8a81b0620d4e9d4f0ecae786d2d7e667312fecec5425ce8fdd"`
[INFO] [stdout] edf893ddc5b4de8a81b0620d4e9d4f0ecae786d2d7e667312fecec5425ce8fdd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/jcong_minigrep/0.1.0:/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] a71fa84a376bcd44994ae2d67afbc8a8ef08c71010bf83e0d3f15f5cfc89eabf
[INFO] running `"docker" "start" "-a" "a71fa84a376bcd44994ae2d67afbc8a8ef08c71010bf83e0d3f15f5cfc89eabf"`
[INFO] [stderr]    Compiling jcong_minigrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]  --> src/lib.rs:1:21
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fs::{self, File};
[INFO] [stderr]   |                     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]  --> src/lib.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "a71fa84a376bcd44994ae2d67afbc8a8ef08c71010bf83e0d3f15f5cfc89eabf"`
[INFO] running `"docker" "rm" "-f" "a71fa84a376bcd44994ae2d67afbc8a8ef08c71010bf83e0d3f15f5cfc89eabf"`
[INFO] [stdout] a71fa84a376bcd44994ae2d67afbc8a8ef08c71010bf83e0d3f15f5cfc89eabf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/jcong_minigrep/0.1.0:/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] 1aace9687af5dedc1c58fba7543eab84d36238298ff58483884cf97bb1fae02e
[INFO] running `"docker" "start" "-a" "1aace9687af5dedc1c58fba7543eab84d36238298ff58483884cf97bb1fae02e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/jcong_minigrep-809d9d3870fa9db4
[INFO] [stderr]      Running /opt/crater/target/debug/deps/jcong_minigrep-71e11d7a298d5fda
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests jcong_minigrep
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::case_insensitive ... ok
[INFO] [stdout] test tests::case_sensitive ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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] [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" "1aace9687af5dedc1c58fba7543eab84d36238298ff58483884cf97bb1fae02e"`
[INFO] running `"docker" "rm" "-f" "1aace9687af5dedc1c58fba7543eab84d36238298ff58483884cf97bb1fae02e"`
[INFO] [stdout] 1aace9687af5dedc1c58fba7543eab84d36238298ff58483884cf97bb1fae02e