[INFO] fetching crate webrtc-sdp 0.3.10...
[INFO] checking webrtc-sdp-0.3.10 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate webrtc-sdp 0.3.10 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate webrtc-sdp 0.3.10 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate webrtc-sdp 0.3.10
[INFO] finished tweaking crates.io crate webrtc-sdp 0.3.10
[INFO] tweaked toml for crates.io crate webrtc-sdp 0.3.10 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate webrtc-sdp 0.3.10 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.133
[INFO] [stderr]   Downloaded serde_json v1.0.74
[INFO] [stderr]   Downloaded serde v1.0.133
[INFO] [stderr]   Downloaded syn v1.0.85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc45a4a63653c47643e88d630ecff864fe559cecfa1ca956719dc12f3f47f07b
[INFO] running `Command { std: "docker" "start" "-a" "dc45a4a63653c47643e88d630ecff864fe559cecfa1ca956719dc12f3f47f07b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc45a4a63653c47643e88d630ecff864fe559cecfa1ca956719dc12f3f47f07b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc45a4a63653c47643e88d630ecff864fe559cecfa1ca956719dc12f3f47f07b", kill_on_drop: false }`
[INFO] [stdout] dc45a4a63653c47643e88d630ecff864fe559cecfa1ca956719dc12f3f47f07b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5450db9e6c0f5ccd27bb63dbfb8cfa6884426a7da402a7d6e7b7f625813fe6f2
[INFO] running `Command { std: "docker" "start" "-a" "5450db9e6c0f5ccd27bb63dbfb8cfa6884426a7da402a7d6e7b7f625813fe6f2", kill_on_drop: false }`
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking unicode-bidi v0.3.7
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling serde_json v1.0.74
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking tinyvec v1.5.1
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking webrtc-sdp v0.3.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ipv4Addr` is imported redundantly
[INFO] [stdout]  --> src/./address_tests.rs:8:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | use super::*;
[INFO] [stdout]   |     -------- the item `Ipv4Addr` is already imported here
[INFO] [stdout] 7 | use std::error::Error;
[INFO] [stdout] 8 | use std::net::{AddrParseError, Ipv4Addr, Ipv6Addr};
[INFO] [stdout]   |                                ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ipv6Addr` is imported redundantly
[INFO] [stdout]  --> src/./address_tests.rs:8:42
[INFO] [stdout]   |
[INFO] [stdout] 6 | use super::*;
[INFO] [stdout]   |     -------- the item `Ipv6Addr` is already imported here
[INFO] [stdout] 7 | use std::error::Error;
[INFO] [stdout] 8 | use std::net::{AddrParseError, Ipv4Addr, Ipv6Addr};
[INFO] [stdout]   |                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.47s
[INFO] running `Command { std: "docker" "inspect" "5450db9e6c0f5ccd27bb63dbfb8cfa6884426a7da402a7d6e7b7f625813fe6f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5450db9e6c0f5ccd27bb63dbfb8cfa6884426a7da402a7d6e7b7f625813fe6f2", kill_on_drop: false }`
[INFO] [stdout] 5450db9e6c0f5ccd27bb63dbfb8cfa6884426a7da402a7d6e7b7f625813fe6f2