Sep 02 05:13:59.200 INFO checking parsec-0.5.0 against try#952c7dbfa2628309f557b367929ffc17af20b332 for pr-53851
Sep 02 05:13:59.200 INFO running: cargo +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets
Sep 02 05:13:59.200 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53851/try#952c7dbfa2628309f557b367929ffc17af20b332:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-0/try#952c7dbfa2628309f557b367929ffc17af20b332:/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 +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 05:13:59.450 INFO blam! b7670a27e92155b0a0e4b6e57010781796c5e9f2411634708cd719b650d0a9a6
Sep 02 05:13:59.453 INFO running `"docker" "start" "-a" "b7670a27e92155b0a0e4b6e57010781796c5e9f2411634708cd719b650d0a9a6"`
Sep 02 05:14:00.501 INFO kablam!     Checking regex v0.2.11
Sep 02 05:14:00.501 INFO kablam!     Checking ws v0.7.3
Sep 02 05:14:00.503 INFO kablam!     Checking log4rs v0.7.0
Sep 02 05:14:02.180 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 02 05:14:02.180 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/file.rs:25:3
Sep 02 05:14:02.180 INFO kablam!    |
Sep 02 05:14:02.180 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 02 05:14:02.180 INFO kablam!    |   ^^^^^
Sep 02 05:14:02.180 INFO kablam!    |
Sep 02 05:14:02.180 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 05:14:02.180 INFO kablam! 
Sep 02 05:14:02.180 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 02 05:14:02.180 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/console.rs:24:3
Sep 02 05:14:02.180 INFO kablam!    |
Sep 02 05:14:02.180 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 05:14:02.180 INFO kablam!    |   ^^^^^
Sep 02 05:14:02.180 INFO kablam!    |
Sep 02 05:14:02.180 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 05:14:02.180 INFO kablam! 
Sep 02 05:14:02.181 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 02 05:14:02.181 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 02 05:14:02.181 INFO kablam!    |
Sep 02 05:14:02.181 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 02 05:14:02.181 INFO kablam!    |   ^^^^^
Sep 02 05:14:02.181 INFO kablam!    |
Sep 02 05:14:02.181 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 05:14:02.181 INFO kablam! 
Sep 02 05:14:02.181 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 02 05:14:02.181 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 02 05:14:02.181 INFO kablam!    |
Sep 02 05:14:02.182 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 02 05:14:02.182 INFO kablam!    |   ^^^^^
Sep 02 05:14:02.182 INFO kablam!    |
Sep 02 05:14:02.182 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 05:14:02.182 INFO kablam! 
Sep 02 05:14:02.182 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 02 05:14:02.182 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 02 05:14:02.182 INFO kablam!    |
Sep 02 05:14:02.182 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 02 05:14:02.182 INFO kablam!    |   ^^^^^
Sep 02 05:14:02.182 INFO kablam!    |
Sep 02 05:14:02.182 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 05:14:02.182 INFO kablam! 
Sep 02 05:14:02.182 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 02 05:14:02.182 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 02 05:14:02.182 INFO kablam!    |
Sep 02 05:14:02.182 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 02 05:14:02.182 INFO kablam!    |   ^^^^^
Sep 02 05:14:02.182 INFO kablam!    |
Sep 02 05:14:02.182 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 05:14:02.183 INFO kablam! 
Sep 02 05:14:02.183 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 02 05:14:02.183 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.7.0/src/append/rolling_file/mod.rs:46:3
Sep 02 05:14:02.183 INFO kablam!    |
Sep 02 05:14:02.183 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 02 05:14:02.183 INFO kablam!    |   ^^^^^
Sep 02 05:14:02.183 INFO kablam!    |
Sep 02 05:14:02.183 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 02 05:14:02.183 INFO kablam! 
Sep 02 05:14:02.314 INFO kablam! error: aborting due to 7 previous errors
Sep 02 05:14:02.314 INFO kablam! 
Sep 02 05:14:02.314 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 02 05:14:02.323 INFO kablam! error: Could not compile `log4rs`.
Sep 02 05:14:02.323 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 02 05:14:04.566 INFO kablam! error: build failed
Sep 02 05:14:04.567 INFO kablam! su: No module specific data is present
Sep 02 05:14:05.035 INFO running `"docker" "rm" "-f" "b7670a27e92155b0a0e4b6e57010781796c5e9f2411634708cd719b650d0a9a6"`
Sep 02 05:14:05.195 INFO blam! b7670a27e92155b0a0e4b6e57010781796c5e9f2411634708cd719b650d0a9a6