[INFO] updating cached repository Szczurowski/rust-example-hero
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Szczurowski/rust-example-hero
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Szczurowski/rust-example-hero" "work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/Szczurowski/rust-example-hero"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/Szczurowski/rust-example-hero'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Szczurowski/rust-example-hero" "work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/Szczurowski/rust-example-hero"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/Szczurowski/rust-example-hero'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] db5b60b1109b1fbae2531d7568717bb77b4c28fc
[INFO] sha for GitHub repo Szczurowski/rust-example-hero: db5b60b1109b1fbae2531d7568717bb77b4c28fc
[INFO] validating manifest of Szczurowski/rust-example-hero on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Szczurowski/rust-example-hero on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Szczurowski/rust-example-hero
[INFO] finished frobbing Szczurowski/rust-example-hero
[INFO] frobbed toml for Szczurowski/rust-example-hero written to work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/Szczurowski/rust-example-hero/Cargo.toml
[INFO] started frobbing Szczurowski/rust-example-hero
[INFO] finished frobbing Szczurowski/rust-example-hero
[INFO] frobbed toml for Szczurowski/rust-example-hero written to work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/Szczurowski/rust-example-hero/Cargo.toml
[INFO] crate Szczurowski/rust-example-hero already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Szczurowski/rust-example-hero against master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7 for pr-62507
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62507/worker-7/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/Szczurowski/rust-example-hero:/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" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 89669172c7a147da8dfa8c01791c6425ccca23a3536f16d247b86f4a936454a8
[INFO] running `"docker" "start" "-a" "89669172c7a147da8dfa8c01791c6425ccca23a3536f16d247b86f4a936454a8"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.12
[INFO] [stderr]    Compiling pear_codegen v0.1.0 (http://github.com/SergioBenitez/Pear?rev=b475140#b4751403)
[INFO] [stderr]    Compiling rocket v0.4.0-dev (https://github.com/SergioBenitez/Rocket?rev=fe9fad3#fe9fad33)
[INFO] [stderr]    Compiling rocket_codegen v0.4.0-dev (https://github.com/SergioBenitez/Rocket?rev=fe9fad3#fe9fad33)
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking inotify v0.3.0
[INFO] [stderr]     Checking serde_json v1.0.26
[INFO] [stderr]    Compiling ring v0.13.2
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]     Checking scan_fmt v0.1.3
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site'
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
[INFO] [stderr]     |
[INFO] [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/54724
[INFO] [stderr]     = help: add #![feature(proc_macro_def_site)] 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 `proc-macro2`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "89669172c7a147da8dfa8c01791c6425ccca23a3536f16d247b86f4a936454a8"`
[INFO] running `"docker" "rm" "-f" "89669172c7a147da8dfa8c01791c6425ccca23a3536f16d247b86f4a936454a8"`
[INFO] [stdout] 89669172c7a147da8dfa8c01791c6425ccca23a3536f16d247b86f4a936454a8