[INFO] cloning repository https://github.com/dougfort/quinn-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dougfort/quinn-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdougfort%2Fquinn-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdougfort%2Fquinn-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 373fe57299eeb93a7d192d1caa7d9749f9ec237f
[INFO] checking dougfort/quinn-experiment against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdougfort%2Fquinn-experiment" "/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/dougfort/quinn-experiment 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/dougfort/quinn-experiment
[INFO] finished tweaking git repo https://github.com/dougfort/quinn-experiment
[INFO] tweaked toml for git repo https://github.com/dougfort/quinn-experiment written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dougfort/quinn-experiment 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-attributes v0.1.18
[INFO] [stderr]   Downloaded quinn-udp v0.1.0
[INFO] [stderr]   Downloaded rustls-native-certs v0.6.1
[INFO] [stderr]   Downloaded futures-io v0.3.19
[INFO] [stderr]   Downloaded futures-macro v0.3.19
[INFO] [stderr]   Downloaded rustls-pemfile v0.2.1
[INFO] [stderr]   Downloaded futures-task v0.3.19
[INFO] [stderr]   Downloaded futures-core v0.3.19
[INFO] [stderr]   Downloaded futures-channel v0.3.19
[INFO] [stderr]   Downloaded security-framework v2.4.2
[INFO] [stderr]   Downloaded pin-project v1.0.9
[INFO] [stderr]   Downloaded futures-util v0.3.19
[INFO] [stderr]   Downloaded tokio v1.15.0
[INFO] [stderr]   Downloaded quinn-proto v0.8.0
[INFO] [stderr]   Downloaded rustls v0.20.2
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.4
[INFO] [stderr]   Downloaded socket2 v0.4.2
[INFO] [stderr]   Downloaded quinn v0.8.0
[INFO] [stderr]   Downloaded pin-project-internal v1.0.9
[INFO] [stderr]   Downloaded security-framework-sys v2.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 9da2ffeb8ab44d165556b9a662a261c698f25115414ed38807dde5f9675c137d
[INFO] running `Command { std: "docker" "start" "-a" "9da2ffeb8ab44d165556b9a662a261c698f25115414ed38807dde5f9675c137d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9da2ffeb8ab44d165556b9a662a261c698f25115414ed38807dde5f9675c137d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9da2ffeb8ab44d165556b9a662a261c698f25115414ed38807dde5f9675c137d", kill_on_drop: false }`
[INFO] [stdout] 9da2ffeb8ab44d165556b9a662a261c698f25115414ed38807dde5f9675c137d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 16462707505cbf076e9a9c0a8385991bb37a2406b4ffe04a6e7f72b4d367d2f7
[INFO] running `Command { std: "docker" "start" "-a" "16462707505cbf076e9a9c0a8385991bb37a2406b4ffe04a6e7f72b4d367d2f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]     Checking tracing-core v0.1.21
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]     Checking rustls-pemfile v0.2.1
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking openssl-probe v0.1.4
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking tinyvec v1.5.1
[INFO] [stderr]     Checking futures-io v0.3.19
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking unicode-bidi v0.3.7
[INFO] [stderr]     Checking rustls-native-certs v0.6.1
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking anyhow v1.0.52
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking webpki v0.22.0
[INFO] [stderr]     Checking rustls v0.20.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.18
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling futures-macro v0.3.19
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.9
[INFO] [stderr]     Checking tokio v1.15.0
[INFO] [stderr]     Checking tracing v0.1.29
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking pin-project v1.0.9
[INFO] [stderr]     Checking quinn-proto v0.8.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.4
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking quinn-udp v0.1.0
[INFO] [stderr]     Checking quinn v0.8.0
[INFO] [stderr]     Checking quinn-experiment v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.20s
[INFO] running `Command { std: "docker" "inspect" "16462707505cbf076e9a9c0a8385991bb37a2406b4ffe04a6e7f72b4d367d2f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16462707505cbf076e9a9c0a8385991bb37a2406b4ffe04a6e7f72b4d367d2f7", kill_on_drop: false }`
[INFO] [stdout] 16462707505cbf076e9a9c0a8385991bb37a2406b4ffe04a6e7f72b4d367d2f7