[INFO] cloning repository thorntonmc/lson
[INFO] running `"git" "clone" "--bare" "git://github.com/thorntonmc/lson.git" "work/cache/sources/gh/thorntonmc/lson"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/thorntonmc/lson'...
[INFO] running `"git" "clone" "work/cache/sources/gh/thorntonmc/lson" "work/ex/beta-1.37-6/sources/1.36.0/gh/thorntonmc/lson"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/thorntonmc/lson'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/thorntonmc/lson" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thorntonmc/lson"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thorntonmc/lson'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 726776dd3098c01589643f0be46e101fda0b022f
[INFO] sha for GitHub repo thorntonmc/lson: 726776dd3098c01589643f0be46e101fda0b022f
[INFO] validating manifest of thorntonmc/lson 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 thorntonmc/lson 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 thorntonmc/lson
[INFO] finished frobbing thorntonmc/lson
[INFO] frobbed toml for thorntonmc/lson written to work/ex/beta-1.37-6/sources/1.36.0/gh/thorntonmc/lson/Cargo.toml
[INFO] started frobbing thorntonmc/lson
[INFO] finished frobbing thorntonmc/lson
[INFO] frobbed toml for thorntonmc/lson written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thorntonmc/lson/Cargo.toml
[INFO] crate thorntonmc/lson already has a lockfile, it will not be regenerated
[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 thorntonmc/lson 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-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thorntonmc/lson:/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] 5d1fe3e75e68e7ac757ff24feb3f8e483397274c19fe591e5d4cac22077f5332
[INFO] running `"docker" "start" "-a" "5d1fe3e75e68e7ac757ff24feb3f8e483397274c19fe591e5d4cac22077f5332"`
[INFO] [stderr]    Compiling syn v0.15.38
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling structopt-derive v0.2.16
[INFO] [stderr]    Compiling structopt v0.2.16
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling lson v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `contents`
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     contents: Option<Box<BinaryFile>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.52s
[INFO] running `"docker" "inspect" "5d1fe3e75e68e7ac757ff24feb3f8e483397274c19fe591e5d4cac22077f5332"`
[INFO] running `"docker" "rm" "-f" "5d1fe3e75e68e7ac757ff24feb3f8e483397274c19fe591e5d4cac22077f5332"`
[INFO] [stdout] 5d1fe3e75e68e7ac757ff24feb3f8e483397274c19fe591e5d4cac22077f5332
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thorntonmc/lson:/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] 2b1945a7a83d96bb4607affbc4b5179750290f38737e51ad67a2099050fb2677
[INFO] running `"docker" "start" "-a" "2b1945a7a83d96bb4607affbc4b5179750290f38737e51ad67a2099050fb2677"`
[INFO] [stderr]    Compiling lson v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `contents`
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     contents: Option<Box<BinaryFile>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `"docker" "inspect" "2b1945a7a83d96bb4607affbc4b5179750290f38737e51ad67a2099050fb2677"`
[INFO] running `"docker" "rm" "-f" "2b1945a7a83d96bb4607affbc4b5179750290f38737e51ad67a2099050fb2677"`
[INFO] [stdout] 2b1945a7a83d96bb4607affbc4b5179750290f38737e51ad67a2099050fb2677
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thorntonmc/lson:/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] 55e913b5ca19cb8321336084e91916c1c721d94b3c05ac3e0120862e45fb6fb5
[INFO] running `"docker" "start" "-a" "55e913b5ca19cb8321336084e91916c1c721d94b3c05ac3e0120862e45fb6fb5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lson-2b14d2a31e13657c
[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" "55e913b5ca19cb8321336084e91916c1c721d94b3c05ac3e0120862e45fb6fb5"`
[INFO] running `"docker" "rm" "-f" "55e913b5ca19cb8321336084e91916c1c721d94b3c05ac3e0120862e45fb6fb5"`
[INFO] [stdout] 55e913b5ca19cb8321336084e91916c1c721d94b3c05ac3e0120862e45fb6fb5