Dec 17 17:13:46.201 INFO checking rbalicki2/wasm-experiments against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 17:13:46.201 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/rbalicki2/wasm-experiments:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 17:13:46.642 INFO [stdout] 62a98452440bf94d1e82421bd84a6d466b436e3966291dbc6feb25ca895f560f
Dec 17 17:13:46.644 INFO running `"docker" "start" "-a" "62a98452440bf94d1e82421bd84a6d466b436e3966291dbc6feb25ca895f560f"`
Dec 17 17:13:47.945 INFO [stderr]     Checking serde_json v1.0.9
Dec 17 17:13:49.884 INFO [stderr]     Checking stdweb v0.3.0
Dec 17 17:14:07.432 INFO [stderr]     Checking wasm-minimal v0.1.0 (/opt/crater/workdir)
Dec 17 17:14:07.632 INFO [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812)
Dec 17 17:14:07.632 INFO [stderr]  --> src/lib.rs:2:1
Dec 17 17:14:07.632 INFO [stderr]   |
Dec 17 17:14:07.632 INFO [stderr] 2 | extern crate libc;
Dec 17 17:14:07.632 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 17 17:14:07.632 INFO [stderr]   |
Dec 17 17:14:07.632 INFO [stderr]   = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 17 17:14:07.632 INFO [stderr] 
Dec 17 17:14:07.660 INFO [stderr] error: aborting due to previous error
Dec 17 17:14:07.661 INFO [stderr] 
Dec 17 17:14:07.661 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 17 17:14:07.692 INFO [stderr] error: Could not compile `wasm-minimal`.
Dec 17 17:14:07.693 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 17 17:14:07.726 INFO [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812)
Dec 17 17:14:07.727 INFO [stderr]  --> src/lib.rs:2:1
Dec 17 17:14:07.728 INFO [stderr]   |
Dec 17 17:14:07.728 INFO [stderr] 2 | extern crate libc;
Dec 17 17:14:07.728 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 17 17:14:07.728 INFO [stderr]   |
Dec 17 17:14:07.728 INFO [stderr]   = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 17 17:14:07.728 INFO [stderr] 
Dec 17 17:14:07.755 INFO [stderr] error: aborting due to previous error
Dec 17 17:14:07.755 INFO [stderr] 
Dec 17 17:14:07.756 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 17 17:14:07.768 INFO [stderr] error: Could not compile `wasm-minimal`.
Dec 17 17:14:07.768 INFO [stderr] 
Dec 17 17:14:07.768 INFO [stderr] To learn more, run the command again with --verbose.
Dec 17 17:14:08.398 INFO running `"docker" "inspect" "62a98452440bf94d1e82421bd84a6d466b436e3966291dbc6feb25ca895f560f"`
Dec 17 17:14:08.601 INFO running `"docker" "rm" "-f" "62a98452440bf94d1e82421bd84a6d466b436e3966291dbc6feb25ca895f560f"`
Dec 17 17:14:08.866 INFO [stdout] 62a98452440bf94d1e82421bd84a6d466b436e3966291dbc6feb25ca895f560f