[INFO] fetching crate jsave 0.2.1...
[INFO] testing jsave-0.2.1 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate jsave 0.2.1 into /workspace/builds/worker-2-tc1/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-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate jsave 0.2.1 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 24 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded parking_lot v0.12.5
[INFO] [stderr]   Downloaded lock_api v0.4.14
[INFO] [stderr]   Downloaded redox_syscall v0.5.18
[INFO] [stderr]   Downloaded parking_lot_core v0.9.12
[INFO] [stderr]   Downloaded indexmap v2.12.0
[INFO] [stderr]   Downloaded hashbrown v0.16.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dadf5f17c576617c861951389746e9d2cfde1152f3e1219fe7420743c4c1b993
[INFO] running `Command { std: "docker" "start" "-a" "dadf5f17c576617c861951389746e9d2cfde1152f3e1219fe7420743c4c1b993", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dadf5f17c576617c861951389746e9d2cfde1152f3e1219fe7420743c4c1b993", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dadf5f17c576617c861951389746e9d2cfde1152f3e1219fe7420743c4c1b993", kill_on_drop: false }`
[INFO] [stdout] dadf5f17c576617c861951389746e9d2cfde1152f3e1219fe7420743c4c1b993
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49671e6f8df0d54dbe944425145247592bc70e70a4541d4db62bc1fc86ff1249
[INFO] running `Command { std: "docker" "start" "-a" "49671e6f8df0d54dbe944425145247592bc70e70a4541d4db62bc1fc86ff1249", kill_on_drop: false }`
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling jsave v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: expected a `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] 667 |     pub fn try_map<U: ?Sized, F>(
[INFO] [stdout]     |            ------- required by a bound in this associated function
[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] running `Command { std: "docker" "inspect" "49671e6f8df0d54dbe944425145247592bc70e70a4541d4db62bc1fc86ff1249", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49671e6f8df0d54dbe944425145247592bc70e70a4541d4db62bc1fc86ff1249", kill_on_drop: false }`
[INFO] [stdout] 49671e6f8df0d54dbe944425145247592bc70e70a4541d4db62bc1fc86ff1249
