Sep 01 23:36:02.782 INFO checking crust-0.31.0 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 23:36:02.782 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 23:36:02.782 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-3/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 23:36:02.974 INFO blam! da549c0ed52b5bbd4b3d5c4ca06b41576679fa45e1fda2594d7f389df1c37ff0
Sep 01 23:36:02.975 INFO running `"docker" "start" "-a" "da549c0ed52b5bbd4b3d5c4ca06b41576679fa45e1fda2594d7f389df1c37ff0"`
Sep 01 23:36:03.999 INFO kablam!    Compiling encoding_rs v0.8.6
Sep 01 23:36:04.001 INFO kablam!    Compiling base64 v0.9.2
Sep 01 23:36:04.004 INFO kablam!    Compiling bytes v0.4.9
Sep 01 23:36:04.006 INFO kablam!    Compiling crossbeam-epoch v0.5.2
Sep 01 23:36:04.009 INFO kablam!    Compiling url v1.5.1
Sep 01 23:36:04.012 INFO kablam!     Checking clap v2.25.1
Sep 01 23:36:04.014 INFO kablam!    Compiling openssl v0.9.24
Sep 01 23:36:04.016 INFO kablam!    Compiling libflate v0.1.16
Sep 01 23:36:12.405 INFO kablam!     Checking config_file_handler v0.11.0
Sep 01 23:36:12.466 INFO kablam!    Compiling phf v0.7.23
Sep 01 23:36:14.974 INFO kablam!    Compiling flate2 v1.0.2
Sep 01 23:36:16.656 INFO kablam!    Compiling crossbeam-deque v0.6.1
Sep 01 23:36:20.866 INFO kablam!     Checking igd v0.6.0
Sep 01 23:36:20.866 INFO kablam!    Compiling tokio-io v0.1.8
Sep 01 23:36:20.874 INFO kablam!    Compiling serde_urlencoded v0.5.3
Sep 01 23:36:20.885 INFO kablam!    Compiling tokio-threadpool v0.1.6
Sep 01 23:36:20.919 INFO kablam!    Compiling zip v0.3.3
Sep 01 23:36:27.540 INFO kablam!     Checking log4rs v0.7.0
Sep 01 23:36:28.578 INFO kablam!    Compiling tokio-reactor v0.1.5
Sep 01 23:36:28.581 INFO kablam!    Compiling tokio-codec v0.1.0
Sep 01 23:36:28.585 INFO kablam!    Compiling native-tls v0.1.5
Sep 01 23:36:28.592 INFO kablam!    Compiling mime_guess v2.0.0-alpha.6
Sep 01 23:36:28.698 INFO kablam!    Compiling tokio-fs v0.1.3
Sep 01 23:36:30.930 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 23:36:30.930 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Sep 01 23:36:30.930 INFO kablam!    |
Sep 01 23:36:30.930 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 01 23:36:30.930 INFO kablam!    |   ^^^^^
Sep 01 23:36:30.930 INFO kablam!    |
Sep 01 23:36:30.930 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 23:36:30.931 INFO kablam! 
Sep 01 23:36:30.931 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 23:36:30.931 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Sep 01 23:36:30.931 INFO kablam!    |
Sep 01 23:36:30.931 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 23:36:30.931 INFO kablam!    |   ^^^^^
Sep 01 23:36:30.931 INFO kablam!    |
Sep 01 23:36:30.931 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 23:36:30.931 INFO kablam! 
Sep 01 23:36:30.932 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 23:36:30.932 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Sep 01 23:36:30.932 INFO kablam!    |
Sep 01 23:36:30.932 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 01 23:36:30.932 INFO kablam!    |   ^^^^^
Sep 01 23:36:30.932 INFO kablam!    |
Sep 01 23:36:30.932 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 23:36:30.932 INFO kablam! 
Sep 01 23:36:30.932 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 23:36:30.932 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/roll/fixed_window.rs:17:3
Sep 01 23:36:30.932 INFO kablam!    |
Sep 01 23:36:30.932 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 01 23:36:30.933 INFO kablam!    |   ^^^^^
Sep 01 23:36:30.933 INFO kablam!    |
Sep 01 23:36:30.933 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 23:36:30.933 INFO kablam! 
Sep 01 23:36:30.933 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 23:36:30.933 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Sep 01 23:36:30.933 INFO kablam!    |
Sep 01 23:36:30.933 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 01 23:36:30.933 INFO kablam!    |   ^^^^^
Sep 01 23:36:30.933 INFO kablam!    |
Sep 01 23:36:30.933 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 23:36:30.933 INFO kablam! 
Sep 01 23:36:30.933 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 23:36:30.933 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 01 23:36:30.933 INFO kablam!    |
Sep 01 23:36:30.933 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 01 23:36:30.933 INFO kablam!    |   ^^^^^
Sep 01 23:36:30.933 INFO kablam!    |
Sep 01 23:36:30.933 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 23:36:30.933 INFO kablam! 
Sep 01 23:36:30.933 INFO kablam! error[E0658]: The attribute `serde` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 23:36:30.933 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Sep 01 23:36:30.933 INFO kablam!    |
Sep 01 23:36:30.933 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 01 23:36:30.933 INFO kablam!    |   ^^^^^
Sep 01 23:36:30.933 INFO kablam!    |
Sep 01 23:36:30.933 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 23:36:30.933 INFO kablam! 
Sep 01 23:36:31.061 INFO kablam! error: aborting due to 7 previous errors
Sep 01 23:36:31.061 INFO kablam! 
Sep 01 23:36:31.061 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 23:36:31.070 INFO kablam! error: Could not compile `log4rs`.
Sep 01 23:36:31.071 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 23:36:33.838 INFO kablam! error: build failed
Sep 01 23:36:33.840 INFO kablam! su: No module specific data is present
Sep 01 23:36:34.347 INFO running `"docker" "rm" "-f" "da549c0ed52b5bbd4b3d5c4ca06b41576679fa45e1fda2594d7f389df1c37ff0"`
Sep 01 23:36:34.470 INFO blam! da549c0ed52b5bbd4b3d5c4ca06b41576679fa45e1fda2594d7f389df1c37ff0