[INFO] fetching crate jsave 0.2.1...
[INFO] testing jsave-0.2.1 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate jsave 0.2.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate jsave 0.2.1
[INFO] finished tweaking crates.io crate jsave 0.2.1
[INFO] tweaked toml for crates.io crate jsave 0.2.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate jsave 0.2.1 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 25 packages to highest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da
[INFO] running `Command { std: "docker" "start" "575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.154
[INFO] [stderr]    Compiling smallvec v1.16.3
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling jsave v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: expected an `FnOnce(&T)` closure, found `F`
[INFO] [stdout]    --> src/remutex.rs:192:52
[INFO] [stdout]     |
[INFO] [stdout] 192 |         InnerReentrantMutexGuard::try_map(s.guard, f).map_or_else(
[INFO] [stdout]     |         ---------------------------------          ^ expected an `FnOnce(&T)` closure, found `F`
[INFO] [stdout]     |         |
[INFO] [stdout]     |         required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected a closure with signature `for<'a> fn(&'a _)`
[INFO] [stdout]                found a closure with signature `fn(&mut _)`
[INFO] [stdout] note: required by a bound in `parking_lot::lock_api::ReentrantMutexGuard::<'a, R, G, T>::try_map`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/lock_api-0.4.14/src/remutex.rs:672:12
[INFO] [stdout]     |
[INFO] [stdout] 628 | impl<'a, R: RawMutex + 'a, G: GetThreadId + 'a, T: ?Sized + 'a> ReentrantMutexGuard<'a, R, G, T> {
[INFO] [stdout] ...
[INFO] [stdout] 667 |     pub fn try_map<U: ?Sized, F>(
[INFO] [stdout] ...
[INFO] [stdout] 672 |         F: FnOnce(&T) -> Option<&U>,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ReentrantMutexGuard::<'a, R, G, T>::try_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jsave` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da", kill_on_drop: false }`
[INFO] [stdout] 575bf631d335a8c05a8fdbfbc0a370861cb05355c938f097e944f232388b89da
