[INFO] fetching crate map-trait 0.3.1...
[INFO] testing map-trait-0.3.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate map-trait 0.3.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate map-trait 0.3.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate map-trait 0.3.1
[INFO] finished tweaking crates.io crate map-trait 0.3.1
[INFO] tweaked toml for crates.io crate map-trait 0.3.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 04bcca0141ea18ecd9ace785a73b15c82a6409f3d86579bee05ad27b88c6e544
[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" "04bcca0141ea18ecd9ace785a73b15c82a6409f3d86579bee05ad27b88c6e544", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04bcca0141ea18ecd9ace785a73b15c82a6409f3d86579bee05ad27b88c6e544", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04bcca0141ea18ecd9ace785a73b15c82a6409f3d86579bee05ad27b88c6e544", kill_on_drop: false }`
[INFO] [stdout] 04bcca0141ea18ecd9ace785a73b15c82a6409f3d86579bee05ad27b88c6e544
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a1ad23ba9d88ac879ddb1a512871a7687d691ff2d299ce855d431f7fde5b862
[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" "3a1ad23ba9d88ac879ddb1a512871a7687d691ff2d299ce855d431f7fde5b862", kill_on_drop: false }`
[INFO] [stderr]    Compiling map-trait v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0478]: lifetime bound not satisfied
[INFO] [stdout]   --> src/map.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn get<'a, Q: ?Sized>(&'a self, k: &Q) -> Option<Self::GetGuard<'a>>
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout] note: lifetime parameter instantiated with the lifetime `'m` as defined on the impl at 90:6
[INFO] [stdout]   --> src/map.rs:90:6
[INFO] [stdout]    |
[INFO] [stdout] 90 | impl<'m, K, V, S> Map<'m, K, V> for std::collections::HashMap<K, V, S>
[INFO] [stdout]    |      ^^
[INFO] [stdout] note: but lifetime parameter must outlive the lifetime `'a` as defined on the method body at 99:12
[INFO] [stdout]   --> src/map.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn get<'a, Q: ?Sized>(&'a self, k: &Q) -> Option<Self::GetGuard<'a>>
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0478]: lifetime bound not satisfied
[INFO] [stdout]    --> src/map.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn get<'a, Q: ?Sized>(&'a self, k: &Q) -> Option<Self::GetGuard<'a>>
[INFO] [stdout]     |        ^^^
[INFO] [stdout]     |
[INFO] [stdout] note: lifetime parameter instantiated with the lifetime `'m` as defined on the impl at 113:6
[INFO] [stdout]    --> src/map.rs:113:6
[INFO] [stdout]     |
[INFO] [stdout] 113 | impl<'m, K, V> Map<'m, K, V> for std::collections::BTreeMap<K, V>
[INFO] [stdout]     |      ^^
[INFO] [stdout] note: but lifetime parameter must outlive the lifetime `'a` as defined on the method body at 121:12
[INFO] [stdout]    --> src/map.rs:121:12
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn get<'a, Q: ?Sized>(&'a self, k: &Q) -> Option<Self::GetGuard<'a>>
[INFO] [stdout]     |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0478, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0478`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `map-trait` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "3a1ad23ba9d88ac879ddb1a512871a7687d691ff2d299ce855d431f7fde5b862", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a1ad23ba9d88ac879ddb1a512871a7687d691ff2d299ce855d431f7fde5b862", kill_on_drop: false }`
[INFO] [stdout] 3a1ad23ba9d88ac879ddb1a512871a7687d691ff2d299ce855d431f7fde5b862