[INFO] crate serdebug 1.0.5 is already in cache
[INFO] extracting crate serdebug 1.0.5 into work/ex/beta-1.37-6/sources/1.36.0/reg/serdebug/1.0.5
[INFO] extracting crate serdebug 1.0.5 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/serdebug/1.0.5
[INFO] validating manifest of serdebug-1.0.5 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 serdebug-1.0.5 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 serdebug-1.0.5
[INFO] finished frobbing serdebug-1.0.5
[INFO] frobbed toml for serdebug-1.0.5 written to work/ex/beta-1.37-6/sources/1.36.0/reg/serdebug/1.0.5/Cargo.toml
[INFO] started frobbing serdebug-1.0.5
[INFO] finished frobbing serdebug-1.0.5
[INFO] frobbed toml for serdebug-1.0.5 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/serdebug/1.0.5/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] [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" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing serdebug-1.0.5 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-7/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/serdebug/1.0.5:/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] 91667a16197381ca52390652f93888f57c38ec43802d6928beab20029a1f34d2
[INFO] running `"docker" "start" "-a" "91667a16197381ca52390652f93888f57c38ec43802d6928beab20029a1f34d2"`
[INFO] [stderr]    Compiling serdebug v1.0.5 (/opt/crater/workdir)
[INFO] [stderr]    Compiling serdebug_derive v1.0.0
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:43:32
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.67s
[INFO] running `"docker" "inspect" "91667a16197381ca52390652f93888f57c38ec43802d6928beab20029a1f34d2"`
[INFO] running `"docker" "rm" "-f" "91667a16197381ca52390652f93888f57c38ec43802d6928beab20029a1f34d2"`
[INFO] [stdout] 91667a16197381ca52390652f93888f57c38ec43802d6928beab20029a1f34d2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/serdebug/1.0.5:/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] 5647b5846b6d04e8fabd90264ef59813fe235af9b34d02d9574142cd8fb3dcdf
[INFO] running `"docker" "start" "-a" "5647b5846b6d04e8fabd90264ef59813fe235af9b34d02d9574142cd8fb3dcdf"`
[INFO] [stderr]    Compiling serdebug v1.0.5 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:43:32
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.76s
[INFO] running `"docker" "inspect" "5647b5846b6d04e8fabd90264ef59813fe235af9b34d02d9574142cd8fb3dcdf"`
[INFO] running `"docker" "rm" "-f" "5647b5846b6d04e8fabd90264ef59813fe235af9b34d02d9574142cd8fb3dcdf"`
[INFO] [stdout] 5647b5846b6d04e8fabd90264ef59813fe235af9b34d02d9574142cd8fb3dcdf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/serdebug/1.0.5:/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] 6d66eb95dac135900fdb5ae5a22389a2226adab77b89fbfa33e7259c5d4c4a40
[INFO] running `"docker" "start" "-a" "6d66eb95dac135900fdb5ae5a22389a2226adab77b89fbfa33e7259c5d4c4a40"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/serdebug-6df4c3e463251267
[INFO] [stderr]      Running /opt/crater/target/debug/deps/test-40ee85943c1fcaa6
[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 12 tests
[INFO] [stdout] test empty_named_fields::test_struct ... ok
[INFO] [stdout] test no_fields::test_struct ... ok
[INFO] [stdout] test no_fields::test_enum ... ok
[INFO] [stdout] test named_fields::test_struct ... ok
[INFO] [stdout] test named_fields::test_enum ... ok
[INFO] [stdout] test empty_named_fields::test_enum ... ok
[INFO] [stdout] test single_tuple_field::test_struct ... ok
[INFO] [stdout] test single_tuple_field::test_enum ... ok
[INFO] [stdout] test empty_tuple_fields::test_enum ... ok
[INFO] [stdout] test empty_tuple_fields::test_struct ... ok
[INFO] [stdout] test tuple_fields::test_enum ... ok
[INFO] [stderr]    Doc-tests serdebug
[INFO] [stdout] test tuple_fields::test_struct ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 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" "6d66eb95dac135900fdb5ae5a22389a2226adab77b89fbfa33e7259c5d4c4a40"`
[INFO] running `"docker" "rm" "-f" "6d66eb95dac135900fdb5ae5a22389a2226adab77b89fbfa33e7259c5d4c4a40"`
[INFO] [stdout] 6d66eb95dac135900fdb5ae5a22389a2226adab77b89fbfa33e7259c5d4c4a40