[INFO] cloning repository https://github.com/MFQWKMR4/socket
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MFQWKMR4/socket" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMFQWKMR4%2Fsocket", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMFQWKMR4%2Fsocket'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 822af94724238b0affdec69a8f176bc6fa2332dc
[INFO] checking MFQWKMR4/socket against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMFQWKMR4%2Fsocket" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MFQWKMR4/socket on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MFQWKMR4/socket
[INFO] finished tweaking git repo https://github.com/MFQWKMR4/socket
[INFO] tweaked toml for git repo https://github.com/MFQWKMR4/socket written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/MFQWKMR4/socket 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b394b4bcb9eb2288a21cea3803253b2444061386eefefb43b11ad323f812739
[INFO] running `Command { std: "docker" "start" "-a" "9b394b4bcb9eb2288a21cea3803253b2444061386eefefb43b11ad323f812739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b394b4bcb9eb2288a21cea3803253b2444061386eefefb43b11ad323f812739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b394b4bcb9eb2288a21cea3803253b2444061386eefefb43b11ad323f812739", kill_on_drop: false }`
[INFO] [stdout] 9b394b4bcb9eb2288a21cea3803253b2444061386eefefb43b11ad323f812739
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa50845ed16cb9643dd8132cdc701651fe8134d5e3ed36e04f71191cbfd6fb51
[INFO] running `Command { std: "docker" "start" "-a" "aa50845ed16cb9643dd8132cdc701651fe8134d5e3ed36e04f71191cbfd6fb51", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking object v0.28.4
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]    Compiling backtrace v0.3.65
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking socket-programming v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/tcp_server.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         stream.write_all(&buffer[..nbytes]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let _ = stream.write_all(&buffer[..nbytes]);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/tcp_server.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         stream.write_all(&buffer[..nbytes]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let _ = stream.write_all(&buffer[..nbytes]);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.76s
[INFO] running `Command { std: "docker" "inspect" "aa50845ed16cb9643dd8132cdc701651fe8134d5e3ed36e04f71191cbfd6fb51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa50845ed16cb9643dd8132cdc701651fe8134d5e3ed36e04f71191cbfd6fb51", kill_on_drop: false }`
[INFO] [stdout] aa50845ed16cb9643dd8132cdc701651fe8134d5e3ed36e04f71191cbfd6fb51
[INFO] checking MFQWKMR4/socket against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMFQWKMR4%2Fsocket" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MFQWKMR4/socket on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MFQWKMR4/socket
[INFO] finished tweaking git repo https://github.com/MFQWKMR4/socket
[INFO] tweaked toml for git repo https://github.com/MFQWKMR4/socket written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/MFQWKMR4/socket 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51d3959640d84ceededc5f4a4195327b989a8209e23291ffcdd9add149172884
[INFO] running `Command { std: "docker" "start" "-a" "51d3959640d84ceededc5f4a4195327b989a8209e23291ffcdd9add149172884", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51d3959640d84ceededc5f4a4195327b989a8209e23291ffcdd9add149172884", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51d3959640d84ceededc5f4a4195327b989a8209e23291ffcdd9add149172884", kill_on_drop: false }`
[INFO] [stdout] 51d3959640d84ceededc5f4a4195327b989a8209e23291ffcdd9add149172884
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 948e6da29e0940a64cf2c8bdb692a25a5fa3cec1c0953f1ad0cabb8b9070b1b9
[INFO] running `Command { std: "docker" "start" "-a" "948e6da29e0940a64cf2c8bdb692a25a5fa3cec1c0953f1ad0cabb8b9070b1b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking object v0.28.4
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/miniz_oxide-0.5.3/src/inflate/core.rs:1107:9
[INFO] [stdout]      |
[INFO] [stdout] 1107 | /         match state {
[INFO] [stdout] 1108 | |             Start => generate_state!(state, 'state_machine, {
[INFO] [stdout] 1109 | |                 l.bit_buf = 0;
[INFO] [stdout] 1110 | |                 l.num_bits = 0;
[INFO] [stdout] ...    |
[INFO] [stdout] 1639 | |             _ => break TINFLStatus::Failed,
[INFO] [stdout] 1640 | |         };
[INFO] [stdout]      | |_________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `miniz_oxide` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "948e6da29e0940a64cf2c8bdb692a25a5fa3cec1c0953f1ad0cabb8b9070b1b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "948e6da29e0940a64cf2c8bdb692a25a5fa3cec1c0953f1ad0cabb8b9070b1b9", kill_on_drop: false }`
[INFO] [stdout] 948e6da29e0940a64cf2c8bdb692a25a5fa3cec1c0953f1ad0cabb8b9070b1b9