[INFO] crate slog-struct-diff 0.1.0 is already in cache
[INFO] extracting crate slog-struct-diff 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/slog-struct-diff/0.1.0
[INFO] extracting crate slog-struct-diff 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/slog-struct-diff/0.1.0
[INFO] validating manifest of slog-struct-diff-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 slog-struct-diff-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 slog-struct-diff-0.1.0
[INFO] finished frobbing slog-struct-diff-0.1.0
[INFO] frobbed toml for slog-struct-diff-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/slog-struct-diff/0.1.0/Cargo.toml
[INFO] started frobbing slog-struct-diff-0.1.0
[INFO] finished frobbing slog-struct-diff-0.1.0
[INFO] frobbed toml for slog-struct-diff-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/slog-struct-diff/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] 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 slog-struct-diff-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-1/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/slog-struct-diff/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] 0a26e68cbe5172d5dcf3ae5a2f6191b54a4925e3438c98f43ae9ac1e11c37b9c
[INFO] running `"docker" "start" "-a" "0a26e68cbe5172d5dcf3ae5a2f6191b54a4925e3438c98f43ae9ac1e11c37b9c"`
[INFO] [stderr]    Compiling struct-diff v0.2.3
[INFO] [stderr]    Compiling slog-struct-diff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Diff`
[INFO] [stderr]  --> src/lib.rs:4:19
[INFO] [stderr]   |
[INFO] [stderr] 4 | use struct_diff::{Diff, Difference};
[INFO] [stderr]   |                   ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:15:26
[INFO] [stderr]    |
[INFO] [stderr] 15 |         serializer: &mut Serializer,
[INFO] [stderr]    |                          ^^^^^^^^^^ help: use `dyn`: `dyn Serializer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:28:26
[INFO] [stderr]    |
[INFO] [stderr] 28 |         serializer: &mut Serializer,
[INFO] [stderr]    |                          ^^^^^^^^^^ help: use `dyn`: `dyn Serializer`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `"docker" "inspect" "0a26e68cbe5172d5dcf3ae5a2f6191b54a4925e3438c98f43ae9ac1e11c37b9c"`
[INFO] running `"docker" "rm" "-f" "0a26e68cbe5172d5dcf3ae5a2f6191b54a4925e3438c98f43ae9ac1e11c37b9c"`
[INFO] [stdout] 0a26e68cbe5172d5dcf3ae5a2f6191b54a4925e3438c98f43ae9ac1e11c37b9c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/slog-struct-diff/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] 429849b330730dbb6b94ed7e524e95ae88b1bc9694d690595a215513b14eb79e
[INFO] running `"docker" "start" "-a" "429849b330730dbb6b94ed7e524e95ae88b1bc9694d690595a215513b14eb79e"`
[INFO] [stderr]    Compiling slog-struct-diff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Diff`
[INFO] [stderr]  --> src/lib.rs:4:19
[INFO] [stderr]   |
[INFO] [stderr] 4 | use struct_diff::{Diff, Difference};
[INFO] [stderr]   |                   ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:15:26
[INFO] [stderr]    |
[INFO] [stderr] 15 |         serializer: &mut Serializer,
[INFO] [stderr]    |                          ^^^^^^^^^^ help: use `dyn`: `dyn Serializer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:28:26
[INFO] [stderr]    |
[INFO] [stderr] 28 |         serializer: &mut Serializer,
[INFO] [stderr]    |                          ^^^^^^^^^^ help: use `dyn`: `dyn Serializer`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "429849b330730dbb6b94ed7e524e95ae88b1bc9694d690595a215513b14eb79e"`
[INFO] running `"docker" "rm" "-f" "429849b330730dbb6b94ed7e524e95ae88b1bc9694d690595a215513b14eb79e"`
[INFO] [stdout] 429849b330730dbb6b94ed7e524e95ae88b1bc9694d690595a215513b14eb79e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/slog-struct-diff/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] cabe3541e357272e55a75e03c3b4ebee77e4b01b42818b4e0663601f20861af8
[INFO] running `"docker" "start" "-a" "cabe3541e357272e55a75e03c3b4ebee77e4b01b42818b4e0663601f20861af8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/slog_struct_diff-58095ef5a8abbda6
[INFO] [stderr]    Doc-tests slog-struct-diff
[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" "cabe3541e357272e55a75e03c3b4ebee77e4b01b42818b4e0663601f20861af8"`
[INFO] running `"docker" "rm" "-f" "cabe3541e357272e55a75e03c3b4ebee77e4b01b42818b4e0663601f20861af8"`
[INFO] [stdout] cabe3541e357272e55a75e03c3b4ebee77e4b01b42818b4e0663601f20861af8