[INFO] cloning repository https://github.com/thimble-bot/izzy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thimble-bot/izzy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthimble-bot%2Fizzy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthimble-bot%2Fizzy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ece5ad1b2b82e51ac13d40aa7bb9d1fa83736662
[INFO] checking thimble-bot/izzy against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthimble-bot%2Fizzy" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thimble-bot/izzy 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/thimble-bot/izzy
[INFO] finished tweaking git repo https://github.com/thimble-bot/izzy
[INFO] tweaked toml for git repo https://github.com/thimble-bot/izzy written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/thimble-bot/izzy 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 tinyvec v1.3.1
[INFO] [stderr]   Downloaded typemap_rev v0.1.5
[INFO] [stderr]   Downloaded uwl v0.6.0
[INFO] [stderr]   Downloaded unicode-bidi v0.3.6
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.76
[INFO] [stderr]   Downloaded futures-sink v0.3.16
[INFO] [stderr]   Downloaded sha-1 v0.9.8
[INFO] [stderr]   Downloaded futures-io v0.3.16
[INFO] [stderr]   Downloaded command_attr v0.3.7
[INFO] [stderr]   Downloaded futures-core v0.3.16
[INFO] [stderr]   Downloaded async-trait v0.1.51
[INFO] [stderr]   Downloaded pin-project-internal v1.0.8
[INFO] [stderr]   Downloaded flate2 v1.0.20
[INFO] [stderr]   Downloaded serde_json v1.0.67
[INFO] [stderr]   Downloaded webpki-roots v0.21.1
[INFO] [stderr]   Downloaded serenity v0.10.9
[INFO] [stderr]   Downloaded web-sys v0.3.53
[INFO] [stderr]   Downloaded libc v0.2.101
[INFO] [stderr]   Downloaded tokio v1.10.1
[INFO] [stderr]   Downloaded syn v1.0.75
[INFO] [stderr]   Downloaded encoding_rs v0.8.28
[INFO] [stderr]   Downloaded futures-util v0.3.16
[INFO] [stderr]   Downloaded h2 v0.3.4
[INFO] [stderr]   Downloaded hyper v0.14.12
[INFO] [stderr]   Downloaded js-sys v0.3.53
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.76
[INFO] [stderr]   Downloaded reqwest v0.11.4
[INFO] [stderr]   Downloaded tracing-core v0.1.19
[INFO] [stderr]   Downloaded pin-project v1.0.8
[INFO] [stderr]   Downloaded tungstenite v0.11.1
[INFO] [stderr]   Downloaded async-tungstenite v0.11.0
[INFO] [stderr]   Downloaded futures v0.3.16
[INFO] [stderr]   Downloaded futures-channel v0.3.16
[INFO] [stderr]   Downloaded socket2 v0.4.1
[INFO] [stderr]   Downloaded cc v1.0.69
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.76
[INFO] [stderr]   Downloaded input_buffer v0.3.1
[INFO] [stderr]   Downloaded futures-macro v0.3.16
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.76
[INFO] [stderr]   Downloaded http-body v0.4.3
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.26
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.76
[INFO] [stderr]   Downloaded futures-task v0.3.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] ee1a827b5ce13adbf0491eebd8c7e96696fd533641e5dfd493453160e6ccc2ff
[INFO] running `Command { std: "docker" "start" "-a" "ee1a827b5ce13adbf0491eebd8c7e96696fd533641e5dfd493453160e6ccc2ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee1a827b5ce13adbf0491eebd8c7e96696fd533641e5dfd493453160e6ccc2ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee1a827b5ce13adbf0491eebd8c7e96696fd533641e5dfd493453160e6ccc2ff", kill_on_drop: false }`
[INFO] [stdout] ee1a827b5ce13adbf0491eebd8c7e96696fd533641e5dfd493453160e6ccc2ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 0261f1a88ea08307e2b257ce681721c8b891519bab521138a48a6eecc22efa36
[INFO] running `Command { std: "docker" "start" "-a" "0261f1a88ea08307e2b257ce681721c8b891519bab521138a48a6eecc22efa36", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling tokio v1.10.1
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]     Checking futures-io v0.3.16
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking tracing-core v0.1.19
[INFO] [stderr]     Checking unicode-bidi v0.3.6
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking cpufeatures v0.2.1
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking sha-1 v0.9.8
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking ipnet v2.3.1
[INFO] [stderr]    Compiling serenity v0.10.9
[INFO] [stderr]     Checking typemap_rev v0.1.5
[INFO] [stderr]     Checking uwl v0.6.0
[INFO] [stderr]     Checking input_buffer v0.3.1
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking socket2 v0.4.1
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking http-body v0.4.3
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking tungstenite v0.11.1
[INFO] [stderr]     Checking webpki v0.21.4
[INFO] [stderr]     Checking sct v0.6.1
[INFO] [stderr]     Checking rustls v0.19.1
[INFO] [stderr]     Checking webpki-roots v0.20.0
[INFO] [stderr]     Checking webpki-roots v0.21.1
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling command_attr v0.3.7
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking pin-project v1.0.8
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Checking tokio-rustls v0.22.0
[INFO] [stderr]     Checking async-tungstenite v0.11.0
[INFO] [stderr]     Checking h2 v0.3.4
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking hyper v0.14.12
[INFO] [stderr]     Checking hyper-rustls v0.22.1
[INFO] [stderr]     Checking reqwest v0.11.4
[INFO] [stderr]     Checking thimblebot v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.98s
[INFO] running `Command { std: "docker" "inspect" "0261f1a88ea08307e2b257ce681721c8b891519bab521138a48a6eecc22efa36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0261f1a88ea08307e2b257ce681721c8b891519bab521138a48a6eecc22efa36", kill_on_drop: false }`
[INFO] [stdout] 0261f1a88ea08307e2b257ce681721c8b891519bab521138a48a6eecc22efa36