[INFO] fetching crate biscuit-auth 0.6.0...
[INFO] checking biscuit-auth-0.6.0 against beta for pr-78714
[INFO] extracting crate biscuit-auth 0.6.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate biscuit-auth 0.6.0 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 crates.io crate biscuit-auth 0.6.0
[INFO] finished tweaking crates.io crate biscuit-auth 0.6.0
[INFO] tweaked toml for crates.io crate biscuit-auth 0.6.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate biscuit-auth 0.6.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 19acef6339391c64bf89eadd557fe0debb9e48b521d8781a2af2aaa2f8aa0b4a
[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" "19acef6339391c64bf89eadd557fe0debb9e48b521d8781a2af2aaa2f8aa0b4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19acef6339391c64bf89eadd557fe0debb9e48b521d8781a2af2aaa2f8aa0b4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19acef6339391c64bf89eadd557fe0debb9e48b521d8781a2af2aaa2f8aa0b4a", kill_on_drop: false }`
[INFO] [stdout] 19acef6339391c64bf89eadd557fe0debb9e48b521d8781a2af2aaa2f8aa0b4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56c2a36e9152aebca74a6c1ce34e8c5b1727176619c60a9444a09dfa2c6ed1bf
[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" "56c2a36e9152aebca74a6c1ce34e8c5b1727176619c60a9444a09dfa2c6ed1bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling either v1.6.0
[INFO] [stderr]     Checking subtle v2.3.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling lexical-core v0.7.4
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]    Compiling biscuit-auth v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.9.1
[INFO] [stderr]     Checking hmac v0.9.0
[INFO] [stderr]     Checking sha2 v0.9.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking curve25519-dalek v3.0.0
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]     Checking prost v0.6.1
[INFO] [stderr]     Checking prost-types v0.6.1
[INFO] [stdout] warning: associated function is never used: `check`
[INFO] [stdout]    --> src/token/mod.rs:373:19
[INFO] [stdout]     |
[INFO] [stdout] 373 |     pub(crate) fn check(
[INFO] [stdout]     |                   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `check`
[INFO] [stdout]    --> src/token/mod.rs:653:8
[INFO] [stdout]     |
[INFO] [stdout] 653 |     fn check(
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> benches/token.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `biscuit-auth`
[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] [stdout] warning: associated function is never used: `check`
[INFO] [stdout]    --> src/token/mod.rs:653:8
[INFO] [stdout]     |
[INFO] [stdout] 653 |     fn check(
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/token/mod.rs:1177:9
[INFO] [stdout]      |
[INFO] [stdout] 1177 | /         builder.add_authority_caveat(rule(
[INFO] [stdout] 1178 | |             "caveat1",
[INFO] [stdout] 1179 | |             &[s("test")],
[INFO] [stdout] 1180 | |             &[
[INFO] [stdout] 1181 | |                 pred("resource", &[s("ambient"), s("hello")]),
[INFO] [stdout] 1182 | |             ],
[INFO] [stdout] 1183 | |         ));
[INFO] [stdout]      | |___________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "56c2a36e9152aebca74a6c1ce34e8c5b1727176619c60a9444a09dfa2c6ed1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56c2a36e9152aebca74a6c1ce34e8c5b1727176619c60a9444a09dfa2c6ed1bf", kill_on_drop: false }`
[INFO] [stdout] 56c2a36e9152aebca74a6c1ce34e8c5b1727176619c60a9444a09dfa2c6ed1bf