[INFO] crate serde-ext-macros 0.1.1 is already in cache
[INFO] extracting crate serde-ext-macros 0.1.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/serde-ext-macros/0.1.1
[INFO] extracting crate serde-ext-macros 0.1.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-ext-macros/0.1.1
[INFO] validating manifest of serde-ext-macros-0.1.1 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 serde-ext-macros-0.1.1 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 serde-ext-macros-0.1.1
[INFO] finished frobbing serde-ext-macros-0.1.1
[INFO] frobbed toml for serde-ext-macros-0.1.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/serde-ext-macros/0.1.1/Cargo.toml
[INFO] started frobbing serde-ext-macros-0.1.1
[INFO] finished frobbing serde-ext-macros-0.1.1
[INFO] frobbed toml for serde-ext-macros-0.1.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-ext-macros/0.1.1/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 serde-ext-macros-0.1.1 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-ext-macros/0.1.1:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5aea7901296ef838c7bfa4824c5b7c54e00a89f42832a071cad21eb496aca0f4
[INFO] running `"docker" "start" "-a" "5aea7901296ef838c7bfa4824c5b7c54e00a89f42832a071cad21eb496aca0f4"`
[INFO] [stderr]    Compiling serde-ext-macros v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `out`
[INFO] [stderr]   --> src/lib.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let out = item.clone();
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_out`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `attrs`
[INFO] [stderr]   --> src/lib.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn extend_serde(attrs: TokenStream, item: TokenStream) -> TokenStream {
[INFO] [stderr]    |                     ^^^^^ help: consider prefixing with an underscore: `_attrs`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.80s
[INFO] running `"docker" "inspect" "5aea7901296ef838c7bfa4824c5b7c54e00a89f42832a071cad21eb496aca0f4"`
[INFO] running `"docker" "rm" "-f" "5aea7901296ef838c7bfa4824c5b7c54e00a89f42832a071cad21eb496aca0f4"`
[INFO] [stdout] 5aea7901296ef838c7bfa4824c5b7c54e00a89f42832a071cad21eb496aca0f4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-ext-macros/0.1.1:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 746fa42570628a8fd89a857be88d1b1a784fa4352dfd50b37ff8db6980bcd7a6
[INFO] running `"docker" "start" "-a" "746fa42570628a8fd89a857be88d1b1a784fa4352dfd50b37ff8db6980bcd7a6"`
[INFO] [stderr]    Compiling serde-ext-macros v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `out`
[INFO] [stderr]   --> src/lib.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let out = item.clone();
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_out`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `attrs`
[INFO] [stderr]   --> src/lib.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn extend_serde(attrs: TokenStream, item: TokenStream) -> TokenStream {
[INFO] [stderr]    |                     ^^^^^ help: consider prefixing with an underscore: `_attrs`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `"docker" "inspect" "746fa42570628a8fd89a857be88d1b1a784fa4352dfd50b37ff8db6980bcd7a6"`
[INFO] running `"docker" "rm" "-f" "746fa42570628a8fd89a857be88d1b1a784fa4352dfd50b37ff8db6980bcd7a6"`
[INFO] [stdout] 746fa42570628a8fd89a857be88d1b1a784fa4352dfd50b37ff8db6980bcd7a6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serde-ext-macros/0.1.1:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 0e5f079e56c4cfd67782946792118c9abb1d7ad8a97bacdf0326e0c8dfbb28f7
[INFO] running `"docker" "start" "-a" "0e5f079e56c4cfd67782946792118c9abb1d7ad8a97bacdf0326e0c8dfbb28f7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/serde_ext_macros-de9915671de6b533
[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 serde-ext-macros
[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" "0e5f079e56c4cfd67782946792118c9abb1d7ad8a97bacdf0326e0c8dfbb28f7"`
[INFO] running `"docker" "rm" "-f" "0e5f079e56c4cfd67782946792118c9abb1d7ad8a97bacdf0326e0c8dfbb28f7"`
[INFO] [stdout] 0e5f079e56c4cfd67782946792118c9abb1d7ad8a97bacdf0326e0c8dfbb28f7