[INFO] fetching crate matrix-sdk-common 0.2.0...
[INFO] checking matrix-sdk-common-0.2.0 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate matrix-sdk-common 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate matrix-sdk-common 0.2.0 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate matrix-sdk-common 0.2.0
[INFO] finished tweaking crates.io crate matrix-sdk-common 0.2.0
[INFO] tweaked toml for crates.io crate matrix-sdk-common 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 485040b045ba9305aa3eea30fcb8bf0dfafd676ed1d66b93c390812253f7882c
[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" "485040b045ba9305aa3eea30fcb8bf0dfafd676ed1d66b93c390812253f7882c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "485040b045ba9305aa3eea30fcb8bf0dfafd676ed1d66b93c390812253f7882c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "485040b045ba9305aa3eea30fcb8bf0dfafd676ed1d66b93c390812253f7882c", kill_on_drop: false }`
[INFO] [stdout] 485040b045ba9305aa3eea30fcb8bf0dfafd676ed1d66b93c390812253f7882c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 551b16bb7d7113cd261a1aadffd96ef08c87aec4883d907a90c329ad451da0d4
[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" "551b16bb7d7113cd261a1aadffd96ef08c87aec4883d907a90c329ad451da0d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling paste v1.0.4
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking assign v1.1.1
[INFO] [stderr]     Checking http v0.2.3
[INFO] [stderr]     Checking tokio v0.2.24
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling standback v0.2.14
[INFO] [stderr]    Compiling time v0.2.25
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking thiserror v1.0.23
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking js_int v0.2.0
[INFO] [stderr]     Checking ruma-identifiers-validation v0.2.0
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling ruma-identifiers-macros v0.18.0-alpha.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling ruma-serde-macros v0.3.0
[INFO] [stderr]    Compiling ruma-api-macros v0.17.0-alpha.2
[INFO] [stderr]    Compiling ruma-events-macros v0.22.0-alpha.2
[INFO] [stderr]     Checking ruma-serde v0.3.0
[INFO] [stderr]     Checking ruma-identifiers v0.18.0-alpha.1
[INFO] [stderr]     Checking ruma-common v0.3.0-alpha.1
[INFO] [stderr]     Checking ruma-api v0.17.0-alpha.2
[INFO] [stderr]     Checking ruma-events v0.22.0-alpha.2
[INFO] [stderr]     Checking ruma-federation-api v0.1.0-alpha.1
[INFO] [stderr]     Checking ruma-client-api v0.10.0-alpha.2
[INFO] [stderr]     Checking ruma v0.0.2
[INFO] [stderr]     Checking matrix-sdk-common v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 09s
[INFO] running `Command { std: "docker" "inspect" "551b16bb7d7113cd261a1aadffd96ef08c87aec4883d907a90c329ad451da0d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "551b16bb7d7113cd261a1aadffd96ef08c87aec4883d907a90c329ad451da0d4", kill_on_drop: false }`
[INFO] [stdout] 551b16bb7d7113cd261a1aadffd96ef08c87aec4883d907a90c329ad451da0d4