Sep 10 10:17:37.120 INFO checking scavenger-1.0.0 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 10:17:37.120 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 10:17:37.120 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-5/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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=1000" "-e" "CMD=cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 10:17:37.246 INFO blam! 77c25166beac61dba34f677d80a33821d25b8309c7e768164147fe364d09e5e1
Sep 10 10:17:37.247 INFO running `"docker" "start" "-a" "77c25166beac61dba34f677d80a33821d25b8309c7e768164147fe364d09e5e1"`
Sep 10 10:17:38.123 INFO kablam! usermod: no changes
Sep 10 10:17:38.442 INFO kablam!     Checking log-mdc v0.1.0
Sep 10 10:17:38.447 INFO kablam!     Checking num_cpus v0.2.13
Sep 10 10:17:38.454 INFO kablam!    Compiling scavenger v1.0.0 (file:///source)
Sep 10 10:17:38.458 INFO kablam!     Checking core_affinity v0.5.9
Sep 10 10:17:38.458 INFO kablam!     Checking clap v2.30.0
Sep 10 10:17:38.458 INFO kablam!     Checking log v0.4.5
Sep 10 10:17:38.458 INFO kablam!     Checking serde_yaml v0.7.5
Sep 10 10:17:38.483 INFO kablam!     Checking serde-value v0.5.2
Sep 10 10:17:39.053 INFO kablam!     Checking stopwatch v0.0.7
Sep 10 10:17:40.552 INFO kablam!     Checking tokio-io v0.1.8
Sep 10 10:17:40.552 INFO kablam!     Checking mio v0.6.16
Sep 10 10:17:40.552 INFO kablam!     Checking tokio-threadpool v0.1.6
Sep 10 10:17:40.974 INFO kablam!     Checking rustls v0.13.1
Sep 10 10:17:41.170 INFO kablam!     Checking want v0.0.6
Sep 10 10:17:45.050 INFO kablam!     Checking log4rs v0.8.0
Sep 10 10:17:47.918 INFO kablam!     Checking tokio-codec v0.1.0
Sep 10 10:17:47.919 INFO kablam!     Checking h2 v0.1.12
Sep 10 10:17:48.688 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 10 10:17:48.689 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/file.rs:25:3
Sep 10 10:17:48.689 INFO kablam!    |
Sep 10 10:17:48.689 INFO kablam! 25 | #[serde(deny_unknown_fields)]
Sep 10 10:17:48.689 INFO kablam!    |   ^^^^^
Sep 10 10:17:48.710 INFO kablam!    |
Sep 10 10:17:48.710 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:17:48.710 INFO kablam! 
Sep 10 10:17:48.711 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 10 10:17:48.711 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/console.rs:24:3
Sep 10 10:17:48.711 INFO kablam!    |
Sep 10 10:17:48.711 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 10 10:17:48.711 INFO kablam!    |   ^^^^^
Sep 10 10:17:48.711 INFO kablam!    |
Sep 10 10:17:48.711 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:17:48.711 INFO kablam! 
Sep 10 10:17:48.712 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 10 10:17:48.712 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/roll/delete.rs:16:3
Sep 10 10:17:48.712 INFO kablam!    |
Sep 10 10:17:48.712 INFO kablam! 16 | #[serde(deny_unknown_fields)]
Sep 10 10:17:48.712 INFO kablam!    |   ^^^^^
Sep 10 10:17:48.712 INFO kablam!    |
Sep 10 10:17:48.712 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:17:48.712 INFO kablam! 
Sep 10 10:17:48.713 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 10 10:17:48.713 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/roll/fixed_window.rs:17:3
Sep 10 10:17:48.713 INFO kablam!    |
Sep 10 10:17:48.713 INFO kablam! 17 | #[serde(deny_unknown_fields)]
Sep 10 10:17:48.713 INFO kablam!    |   ^^^^^
Sep 10 10:17:48.713 INFO kablam!    |
Sep 10 10:17:48.713 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:17:48.713 INFO kablam! 
Sep 10 10:17:48.714 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 10 10:17:48.714 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/trigger/size.rs:21:3
Sep 10 10:17:48.714 INFO kablam!    |
Sep 10 10:17:48.714 INFO kablam! 21 | #[serde(deny_unknown_fields)]
Sep 10 10:17:48.714 INFO kablam!    |   ^^^^^
Sep 10 10:17:48.714 INFO kablam!    |
Sep 10 10:17:48.714 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:17:48.714 INFO kablam! 
Sep 10 10:17:48.722 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 10 10:17:48.722 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/policy/compound/mod.rs:24:3
Sep 10 10:17:48.722 INFO kablam!    |
Sep 10 10:17:48.722 INFO kablam! 24 | #[serde(deny_unknown_fields)]
Sep 10 10:17:48.722 INFO kablam!    |   ^^^^^
Sep 10 10:17:48.722 INFO kablam!    |
Sep 10 10:17:48.722 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:17:48.723 INFO kablam! 
Sep 10 10:17:48.723 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 10 10:17:48.723 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/log4rs-0.8.0/src/append/rolling_file/mod.rs:46:3
Sep 10 10:17:48.723 INFO kablam!    |
Sep 10 10:17:48.723 INFO kablam! 46 | #[serde(deny_unknown_fields)]
Sep 10 10:17:48.723 INFO kablam!    |   ^^^^^
Sep 10 10:17:48.723 INFO kablam!    |
Sep 10 10:17:48.723 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 10 10:17:48.724 INFO kablam! 
Sep 10 10:17:49.102 INFO kablam! error: aborting due to 7 previous errors
Sep 10 10:17:49.130 INFO kablam! 
Sep 10 10:17:49.130 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 10 10:17:49.182 INFO kablam! error: Could not compile `log4rs`.
Sep 10 10:17:49.183 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 10 10:18:01.321 INFO kablam! error: build failed
Sep 10 10:18:01.334 INFO kablam! su: No module specific data is present
Sep 10 10:18:02.557 INFO running `"docker" "rm" "-f" "77c25166beac61dba34f677d80a33821d25b8309c7e768164147fe364d09e5e1"`
Sep 10 10:18:02.679 INFO blam! 77c25166beac61dba34f677d80a33821d25b8309c7e768164147fe364d09e5e1