[INFO] fetching crate issue-47048-fix 0.1.3...
[INFO] checking issue-47048-fix-0.1.3 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate issue-47048-fix 0.1.3 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate issue-47048-fix 0.1.3 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 crates.io crate issue-47048-fix 0.1.3
[INFO] finished tweaking crates.io crate issue-47048-fix 0.1.3
[INFO] tweaked toml for crates.io crate issue-47048-fix 0.1.3 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 33 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding idna v0.1.5 (latest: v0.5.0)
[INFO] [stderr]       Adding itertools v0.8.2 (latest: v0.12.1)
[INFO] [stderr]       Adding percent-encoding v1.0.1 (latest: v2.3.1)
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (latest: v1.0.79)
[INFO] [stderr]       Adding pulldown-cmark v0.2.0 (latest: v0.10.2)
[INFO] [stderr]       Adding quote v0.6.13 (latest: v1.0.35)
[INFO] [stderr]       Adding semver-parser v0.9.0 (latest: v0.10.2)
[INFO] [stderr]       Adding syn v0.15.44 (latest: v2.0.58)
[INFO] [stderr]       Adding toml v0.4.10 (latest: v0.8.12)
[INFO] [stderr]       Adding unicode-xid v0.1.0 (latest: v0.2.4)
[INFO] [stderr]       Adding url v1.7.2 (latest: v2.5.0)
[INFO] [stderr]       Adding version-sync v0.7.0 (latest: v0.9.5)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded version-sync v0.7.0
[INFO] [stderr]   Downloaded pulldown-cmark v0.2.0
[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] 914827657d9b2aefe74aac8b0048abda8e8a5ad36353d1acea78849f12e186f0
[INFO] running `Command { std: "docker" "start" "-a" "914827657d9b2aefe74aac8b0048abda8e8a5ad36353d1acea78849f12e186f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "914827657d9b2aefe74aac8b0048abda8e8a5ad36353d1acea78849f12e186f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "914827657d9b2aefe74aac8b0048abda8e8a5ad36353d1acea78849f12e186f0", kill_on_drop: false }`
[INFO] [stdout] 914827657d9b2aefe74aac8b0048abda8e8a5ad36353d1acea78849f12e186f0
[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] cea1743826295e6925d8d6ad780b074d2c60d919a01a53f5615afaef3b9f536a
[INFO] running `Command { std: "docker" "start" "-a" "cea1743826295e6925d8d6ad780b074d2c60d919a01a53f5615afaef3b9f536a", kill_on_drop: false }`
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking semver-parser v0.9.0
[INFO] [stderr]     Checking issue-47048-fix v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking version-sync v0.7.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "cea1743826295e6925d8d6ad780b074d2c60d919a01a53f5615afaef3b9f536a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cea1743826295e6925d8d6ad780b074d2c60d919a01a53f5615afaef3b9f536a", kill_on_drop: false }`
[INFO] [stdout] cea1743826295e6925d8d6ad780b074d2c60d919a01a53f5615afaef3b9f536a