[INFO] cloning repository https://github.com/laurilehmijoki/rust-json-over-udp-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/laurilehmijoki/rust-json-over-udp-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaurilehmijoki%2Frust-json-over-udp-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaurilehmijoki%2Frust-json-over-udp-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 54c68379ff721757fbc4abc64888cdbdad9c1861
[INFO] checking laurilehmijoki/rust-json-over-udp-example against master#6f40082313d8374bdf962aba943a712d5322fae6 for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaurilehmijoki%2Frust-json-over-udp-example" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laurilehmijoki/rust-json-over-udp-example on toolchain 6f40082313d8374bdf962aba943a712d5322fae6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6f40082313d8374bdf962aba943a712d5322fae6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/laurilehmijoki/rust-json-over-udp-example
[INFO] finished tweaking git repo https://github.com/laurilehmijoki/rust-json-over-udp-example
[INFO] tweaked toml for git repo https://github.com/laurilehmijoki/rust-json-over-udp-example written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/laurilehmijoki/rust-json-over-udp-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6f40082313d8374bdf962aba943a712d5322fae6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking laurilehmijoki/rust-json-over-udp-example against try#57fd74335bb14b59b719dc3cc5bc4257e73f33ce for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaurilehmijoki%2Frust-json-over-udp-example" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laurilehmijoki/rust-json-over-udp-example on toolchain 57fd74335bb14b59b719dc3cc5bc4257e73f33ce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/laurilehmijoki/rust-json-over-udp-example
[INFO] finished tweaking git repo https://github.com/laurilehmijoki/rust-json-over-udp-example
[INFO] tweaked toml for git repo https://github.com/laurilehmijoki/rust-json-over-udp-example written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/laurilehmijoki/rust-json-over-udp-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "fetch" "--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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c836be2b2fd86bf1b04b80eb99fe1ea9fe6cf68b93c71910307b1534716495d
[INFO] running `Command { std: "docker" "start" "-a" "3c836be2b2fd86bf1b04b80eb99fe1ea9fe6cf68b93c71910307b1534716495d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c836be2b2fd86bf1b04b80eb99fe1ea9fe6cf68b93c71910307b1534716495d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c836be2b2fd86bf1b04b80eb99fe1ea9fe6cf68b93c71910307b1534716495d", kill_on_drop: false }`
[INFO] [stdout] 3c836be2b2fd86bf1b04b80eb99fe1ea9fe6cf68b93c71910307b1534716495d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c5cfad3db832117e8e737b030f8289ae7e364f52d25c07c9667a42a9677fde0
[INFO] running `Command { std: "docker" "start" "-a" "8c5cfad3db832117e8e737b030f8289ae7e364f52d25c07c9667a42a9677fde0", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-serialize v0.3.14
[INFO] [stdout] error[E0642]: patterns aren't allowed in functions without bodies
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rustc-serialize-0.3.14/src/serialize.rs:144:45
[INFO] [stdout]     |
[INFO] [stdout] 144 | ...                   &f_name: &str,
[INFO] [stdout]     |                       ^^^^^^^ pattern not allowed in function without body
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rustc-serialize-0.3.14/src/serialize.rs:200:41
[INFO] [stdout]     |
[INFO] [stdout] 200 |     fn decode<D: Decoder>(d: &mut D) -> Result<Self, D::Error>;
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
[INFO] [stdout]     |
[INFO] [stdout] note: required by a bound in `Result`
[INFO] [stdout]    --> /rustc/57fd74335bb14b59b719dc3cc5bc4257e73f33ce/library/core/src/result.rs:502:1
[INFO] [stdout] help: consider further restricting `Self`
[INFO] [stdout]     |
[INFO] [stdout] 200 |     fn decode<D: Decoder>(d: &mut D) -> Result<Self, D::Error> where Self: Sized;
[INFO] [stdout]     |                                                                +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0642.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-serialize` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "8c5cfad3db832117e8e737b030f8289ae7e364f52d25c07c9667a42a9677fde0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c5cfad3db832117e8e737b030f8289ae7e364f52d25c07c9667a42a9677fde0", kill_on_drop: false }`
[INFO] [stdout] 8c5cfad3db832117e8e737b030f8289ae7e364f52d25c07c9667a42a9677fde0