[INFO] crate preftool-file 0.2.0 is already in cache
[INFO] checking preftool-file-0.2.0 against try#8810c24b0958114d8dbb32d878444e8956fce80f for pr-66063
[INFO] extracting crate preftool-file 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate preftool-file 0.2.0 on toolchain 8810c24b0958114d8dbb32d878444e8956fce80f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate preftool-file 0.2.0
[INFO] finished tweaking crates.io crate preftool-file 0.2.0
[INFO] tweaked toml for crates.io crate preftool-file 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-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" "+8810c24b0958114d8dbb32d878444e8956fce80f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 03f412e8c30bc9a1ad978b9919a6b82be338bebda83d69477c107040929e5350
[INFO] running `"docker" "start" "-a" "03f412e8c30bc9a1ad978b9919a6b82be338bebda83d69477c107040929e5350"`
[INFO] [stderr]     Checking arc-swap v0.4.3
[INFO] [stderr]     Checking dirs-sys v0.1.0
[INFO] [stderr]    Compiling caseless v0.2.1
[INFO] [stderr]     Checking slog-scope v4.3.0
[INFO] [stderr]     Checking slog-stdlog v3.0.5
[INFO] [stderr]     Checking preftool v0.2.0
[INFO] [stderr]     Checking preftool-dirs 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] 
[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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "03f412e8c30bc9a1ad978b9919a6b82be338bebda83d69477c107040929e5350"`
[INFO] running `"docker" "rm" "-f" "03f412e8c30bc9a1ad978b9919a6b82be338bebda83d69477c107040929e5350"`
[INFO] [stdout] 03f412e8c30bc9a1ad978b9919a6b82be338bebda83d69477c107040929e5350