[INFO] crate preftool-app-config 0.2.0 is already in cache
[INFO] checking preftool-app-config-0.2.0 against try#00e4530a79c42b21a6ca2ac1edb597c90d21f89f for pr-64672
[INFO] extracting crate preftool-app-config 0.2.0 into work/builds/worker-2/source
[INFO] validating manifest of crates.io crate preftool-app-config 0.2.0 on toolchain 00e4530a79c42b21a6ca2ac1edb597c90d21f89f
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate preftool-app-config 0.2.0
[INFO] finished tweaking crates.io crate preftool-app-config 0.2.0
[INFO] tweaked toml for crates.io crate preftool-app-config 0.2.0 written to work/builds/worker-2/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0c29705a923ace4ce9edbb9d87319d2dd6a3ba6ced473da7a4c1a55f93365af1
[INFO] running `"docker" "start" "-a" "0c29705a923ace4ce9edbb9d87319d2dd6a3ba6ced473da7a4c1a55f93365af1"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking dirs-sys v0.1.0
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]     Checking slog-kvfilter v0.7.0
[INFO] [stderr]    Compiling trackable_derive v0.1.2
[INFO] [stderr]    Compiling preftool-clap-derive v0.2.0
[INFO] [stderr]     Checking preftool v0.2.0
[INFO] [stderr]     Checking slog-term v2.4.1
[INFO] [stderr]     Checking preftool-dirs v0.2.0
[INFO] [stderr]     Checking preftool-env v0.2.0
[INFO] [stderr]     Checking preftool-clap v0.2.0
[INFO] [stderr] error[E0658]: type ascription is experimental
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/preftool-dirs-0.2.0/src/lib.rs:22:28
[INFO] [stderr]    |
[INFO] [stderr] 22 |       1 + vec_opt!(__count $($value:expr,)*)
[INFO] [stderr]    |                              ^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/preftool-dirs-0.2.0/src/lin.rs:18:14
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let dirs = vec_opt!(
[INFO] [stderr]    |  ______________-
[INFO] [stderr] 19 | |     // XDG config path
[INFO] [stderr] 20 | |     env::var_os("XDG_CONFIG_HOME")
[INFO] [stderr] 21 | |       .and_then(dirs_sys::is_absolute_path)
[INFO] [stderr] ...  |
[INFO] [stderr] 26 | |       .map(|home_dir| home_dir.join(".config").join(&application)),
[INFO] [stderr] 27 | |   );
[INFO] [stderr]    | |___- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/23416
[INFO] [stderr]    = help: add `#![feature(type_ascription)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `preftool-dirs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0c29705a923ace4ce9edbb9d87319d2dd6a3ba6ced473da7a4c1a55f93365af1"`
[INFO] running `"docker" "rm" "-f" "0c29705a923ace4ce9edbb9d87319d2dd6a3ba6ced473da7a4c1a55f93365af1"`
[INFO] [stdout] 0c29705a923ace4ce9edbb9d87319d2dd6a3ba6ced473da7a4c1a55f93365af1