[INFO] updating cached repository https://github.com/Johni0702/rust-mumble-protocol
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/Johni0702/rust-mumble-protocol
[INFO] [stderr]    0c65a9e..797ea4a  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 797ea4a4471f9e3d3221c46483ff414c0a70e236
[INFO] checking Johni0702/rust-mumble-protocol against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohni0702%2Frust-mumble-protocol" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Johni0702/rust-mumble-protocol on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Johni0702/rust-mumble-protocol
[INFO] finished tweaking git repo https://github.com/Johni0702/rust-mumble-protocol
[INFO] tweaked toml for git repo https://github.com/Johni0702/rust-mumble-protocol written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Johni0702/rust-mumble-protocol already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 542c02c0da14cb874c20fd65a3be667b2bf53a3402e9a22bf86ad3df7ad2cf4e
[INFO] running `"docker" "start" "-a" "542c02c0da14cb874c20fd65a3be667b2bf53a3402e9a22bf86ad3df7ad2cf4e"`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling protobuf v2.12.0
[INFO] [stderr]    Compiling openssl v0.10.28
[INFO] [stderr]     Checking arc-swap v0.4.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]    Compiling openssl-sys v0.9.54
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling protobuf-codegen v2.12.0
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling protobuf-codegen-pure v2.12.0
[INFO] [stderr]     Checking tokio v0.2.15
[INFO] [stderr]    Compiling mumble-protocol v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 22s
[INFO] running `"docker" "inspect" "542c02c0da14cb874c20fd65a3be667b2bf53a3402e9a22bf86ad3df7ad2cf4e"`
[INFO] running `"docker" "rm" "-f" "542c02c0da14cb874c20fd65a3be667b2bf53a3402e9a22bf86ad3df7ad2cf4e"`
[INFO] [stdout] 542c02c0da14cb874c20fd65a3be667b2bf53a3402e9a22bf86ad3df7ad2cf4e