[INFO] updating cached repository funmaker/rust-notifier
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/funmaker/rust-notifier
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/funmaker/rust-notifier" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/funmaker/rust-notifier"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/funmaker/rust-notifier'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/funmaker/rust-notifier" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/funmaker/rust-notifier"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/funmaker/rust-notifier'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f318133790ecf80cc2484bc23ab3ff9c14f37ab0
[INFO] sha for GitHub repo funmaker/rust-notifier: f318133790ecf80cc2484bc23ab3ff9c14f37ab0
[INFO] validating manifest of funmaker/rust-notifier on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of funmaker/rust-notifier on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing funmaker/rust-notifier
[INFO] finished frobbing funmaker/rust-notifier
[INFO] frobbed toml for funmaker/rust-notifier written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/funmaker/rust-notifier/Cargo.toml
[INFO] started frobbing funmaker/rust-notifier
[INFO] finished frobbing funmaker/rust-notifier
[INFO] frobbed toml for funmaker/rust-notifier written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/funmaker/rust-notifier/Cargo.toml
[INFO] crate funmaker/rust-notifier already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking funmaker/rust-notifier against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-7/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/funmaker/rust-notifier:/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 951710c5fc3b5bee8148bf7069e56658288f52439aac7016f9b791dc88b04754
[INFO] running `"docker" "start" "-a" "951710c5fc3b5bee8148bf7069e56658288f52439aac7016f9b791dc88b04754"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling derive_builder v0.5.1
[INFO] [stderr]     Checking futures-await-await-macro v0.1.1
[INFO] [stderr]     Checking maplit v1.0.1
[INFO] [stderr]     Checking encoding_rs v0.7.2
[INFO] [stderr]     Checking socket2 v0.3.7
[INFO] [stderr]     Checking base64 v0.5.2
[INFO] [stderr]    Compiling libz-sys v1.0.18
[INFO] [stderr]    Compiling proc-macro2 v0.4.8
[INFO] [stderr]    Compiling curl-sys v0.4.6
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking bytes v0.4.8
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr] error[E0599]: no method named `to_string` found for type `std::path::PathBuf` in the current scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.8/src/unstable.rs:290:52
[INFO] [stderr]     |
[INFO] [stderr] 290 |         let filename = stable::file_name(sf.path().to_string());
[INFO] [stderr]     |                                                    ^^^^^^^^^ help: there is a method with a similar name: `to_str`
[INFO] [stderr]     |
[INFO] [stderr]     = note: the method `to_string` exists but the following trait bounds were not satisfied:
[INFO] [stderr]             `std::path::Path : std::string::ToString`
[INFO] [stderr]             `std::path::PathBuf : std::string::ToString`
[INFO] [stderr] 
[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-macro2-0.4.8/src/unstable.rs:347:27
[INFO] [stderr]     |
[INFO] [stderr] 347 |             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 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0599, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0599`.
[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" "951710c5fc3b5bee8148bf7069e56658288f52439aac7016f9b791dc88b04754"`
[INFO] running `"docker" "rm" "-f" "951710c5fc3b5bee8148bf7069e56658288f52439aac7016f9b791dc88b04754"`
[INFO] [stdout] 951710c5fc3b5bee8148bf7069e56658288f52439aac7016f9b791dc88b04754