[INFO] cloning repository https://github.com/funmaker/rust-notifier
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/funmaker/rust-notifier" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffunmaker%2Frust-notifier", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffunmaker%2Frust-notifier'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6a836691d5c917bf959dac23c010abf35eeba06c
[INFO] checking funmaker/rust-notifier against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffunmaker%2Frust-notifier" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/funmaker/rust-notifier on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/funmaker/rust-notifier
[INFO] finished tweaking git repo https://github.com/funmaker/rust-notifier
[INFO] tweaked toml for git repo https://github.com/funmaker/rust-notifier written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/funmaker/rust-notifier already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 307cdb43d29f8893929af4ff6447cd5b96f5933b09c04fdc7826525f92246d97
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "307cdb43d29f8893929af4ff6447cd5b96f5933b09c04fdc7826525f92246d97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "307cdb43d29f8893929af4ff6447cd5b96f5933b09c04fdc7826525f92246d97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "307cdb43d29f8893929af4ff6447cd5b96f5933b09c04fdc7826525f92246d97", kill_on_drop: false }`
[INFO] [stdout] 307cdb43d29f8893929af4ff6447cd5b96f5933b09c04fdc7826525f92246d97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f921f8575939271738df04f179e76264ba33fb20f24a50ccf021d7dbf39ad97
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4f921f8575939271738df04f179e76264ba33fb20f24a50ccf021d7dbf39ad97", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.18
[INFO] [stderr]     Checking futures v0.1.23
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]    Compiling pkg-config v0.3.12
[INFO] [stderr]     Checking lazy_static v1.0.2
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]     Checking matches v0.1.7
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]     Checking itoa v0.4.2
[INFO] [stderr]    Compiling derive_builder v0.5.1
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking string v0.1.1
[INFO] [stderr]     Checking indexmap v1.0.1
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking futures-await-await-macro v0.1.1
[INFO] [stderr]     Checking maplit v1.0.1
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking encoding_rs v0.7.2
[INFO] [stderr]     Checking socket2 v0.3.7
[INFO] [stderr]    Compiling proc-macro2 v0.4.8
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.8/src/lib.rs:47:34
[INFO] [stdout]    |
[INFO] [stdout] 47 | #![cfg_attr(feature = "nightly", feature(proc_macro_raw_ident, proc_macro_span))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]     Checking bytes v0.4.8
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking base64 v0.5.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stdout] error[E0599]: no method named `to_string` found for struct `PathBuf` in the current scope
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.8/src/unstable.rs:290:52
[INFO] [stdout]      |
[INFO] [stdout] 290  |           let filename = stable::file_name(sf.path().to_string());
[INFO] [stdout]      |                                                      ^^^^^^^^^ help: there is an associated function with a similar name: `to_str`
[INFO] [stdout]      |
[INFO] [stdout]      = note: the method `to_string` exists but the following trait bounds were not satisfied:
[INFO] [stdout]              `PathBuf: std::fmt::Display`
[INFO] [stdout]              which is required by `PathBuf: ToString`
[INFO] [stdout]              `Path: std::fmt::Display`
[INFO] [stdout]              which is required by `Path: ToString`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'proc_macro_def_site'
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.8/src/unstable.rs:347:27
[INFO] [stdout]     |
[INFO] [stdout] 347 |             Span::Nightly(proc_macro::Span::def_site())
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #54724 <https://github.com/rust-lang/rust/issues/54724> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4f921f8575939271738df04f179e76264ba33fb20f24a50ccf021d7dbf39ad97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f921f8575939271738df04f179e76264ba33fb20f24a50ccf021d7dbf39ad97", kill_on_drop: false }`
[INFO] [stdout] 4f921f8575939271738df04f179e76264ba33fb20f24a50ccf021d7dbf39ad97