[INFO] fetching crate ruma-serde 0.6.0...
[INFO] testing ruma-serde-0.6.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate ruma-serde 0.6.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ruma-serde 0.6.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruma-serde 0.6.0
[INFO] finished tweaking crates.io crate ruma-serde 0.6.0
[INFO] tweaked toml for crates.io crate ruma-serde 0.6.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a330ed9c49b96f52f5122d13592cb483a98301f721c7496874e23aba87fcbd7
[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" "9a330ed9c49b96f52f5122d13592cb483a98301f721c7496874e23aba87fcbd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a330ed9c49b96f52f5122d13592cb483a98301f721c7496874e23aba87fcbd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a330ed9c49b96f52f5122d13592cb483a98301f721c7496874e23aba87fcbd7", kill_on_drop: false }`
[INFO] [stdout] 9a330ed9c49b96f52f5122d13592cb483a98301f721c7496874e23aba87fcbd7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 208596e98b219f2227a59730abda5d5da227c86b07a325b2e64859e348e09a7e
[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" "208596e98b219f2227a59730abda5d5da227c86b07a325b2e64859e348e09a7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling js_int v0.2.1
[INFO] [stderr]    Compiling proc-macro-crate v1.1.3
[INFO] [stderr]    Compiling ruma-serde-macros v0.6.0
[INFO] [stderr]    Compiling ruma-serde v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.85s
[INFO] running `Command { std: "docker" "inspect" "208596e98b219f2227a59730abda5d5da227c86b07a325b2e64859e348e09a7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "208596e98b219f2227a59730abda5d5da227c86b07a325b2e64859e348e09a7e", kill_on_drop: false }`
[INFO] [stdout] 208596e98b219f2227a59730abda5d5da227c86b07a325b2e64859e348e09a7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d070cb0db142a6ffec67717cf5760208de8302bc220a0b372a6b00373dd60cb4
[INFO] running `Command { std: "docker" "start" "-a" "d070cb0db142a6ffec67717cf5760208de8302bc220a0b372a6b00373dd60cb4", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruma-serde v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `ruma_identifiers`
[INFO] [stdout]   --> tests/empty_strings.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use ruma_identifiers::{user_id, UserId};
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ use of undeclared crate or module `ruma_identifiers`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the macro `user_id`
[INFO] [stdout]   --> tests/empty_strings.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         user_id!("@carl:example.com").to_owned()
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/empty_strings.rs:74:33
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let decoded = User { x: None };
[INFO] [stdout]    |                                 ^^^^ cannot infer type for type parameter `T` declared on the enum `Option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/empty_strings.rs:89:33
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let decoded = User { x: None };
[INFO] [stdout]    |                                 ^^^^ cannot infer type for type parameter `T` declared on the enum `Option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/empty_strings.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |         let decoded = User { x: None };
[INFO] [stdout]    |                                 ^^^^ cannot infer type for type parameter `T` declared on the enum `Option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruma-serde` due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d070cb0db142a6ffec67717cf5760208de8302bc220a0b372a6b00373dd60cb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d070cb0db142a6ffec67717cf5760208de8302bc220a0b372a6b00373dd60cb4", kill_on_drop: false }`
[INFO] [stdout] d070cb0db142a6ffec67717cf5760208de8302bc220a0b372a6b00373dd60cb4