[INFO] fetching crate isomer 0.0.0...
[INFO] checking isomer-0.0.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate isomer 0.0.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate isomer 0.0.0 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 isomer 0.0.0
[INFO] finished tweaking crates.io crate isomer 0.0.0
[INFO] tweaked toml for crates.io crate isomer 0.0.0 written to /workspace/builds/worker-3-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 21 packages
[INFO] [stderr]       Adding dashu v0.3.1 (latest: v0.4.2)
[INFO] [stderr]       Adding dashu-base v0.3.1 (latest: v0.4.1)
[INFO] [stderr]       Adding dashu-float v0.3.2 (latest: v0.4.3)
[INFO] [stderr]       Adding dashu-int v0.3.1 (latest: v0.4.1)
[INFO] [stderr]       Adding dashu-macros v0.3.1 (latest: v0.4.1)
[INFO] [stderr]       Adding dashu-ratio v0.3.2 (latest: v0.4.1)
[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 dashu v0.3.1
[INFO] [stderr]   Downloaded dashu-ratio v0.3.2
[INFO] [stderr]   Downloaded crossbeam-skiplist v0.1.3
[INFO] [stderr]   Downloaded dashu-base v0.3.1
[INFO] [stderr]   Downloaded dashu-float v0.3.2
[INFO] [stderr]   Downloaded dashu-int v0.3.1
[INFO] [stderr]   Downloaded dashu-macros v0.3.1
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d6e586ee5898cf7e4664a338c4852d5fe9ebf6aba51659e7eb2c254152be19b
[INFO] running `Command { std: "docker" "start" "-a" "1d6e586ee5898cf7e4664a338c4852d5fe9ebf6aba51659e7eb2c254152be19b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d6e586ee5898cf7e4664a338c4852d5fe9ebf6aba51659e7eb2c254152be19b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d6e586ee5898cf7e4664a338c4852d5fe9ebf6aba51659e7eb2c254152be19b", kill_on_drop: false }`
[INFO] [stdout] 1d6e586ee5898cf7e4664a338c4852d5fe9ebf6aba51659e7eb2c254152be19b
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ea9a2abf54b48af89c97abaecc9d9606ba9f4222adb3b6ff797f59279ea0445
[INFO] running `Command { std: "docker" "start" "-a" "9ea9a2abf54b48af89c97abaecc9d9606ba9f4222adb3b6ff797f59279ea0445", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-modular v0.6.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling dashu-base v0.3.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking crossbeam-skiplist v0.1.3
[INFO] [stderr]    Compiling num-order v1.2.0
[INFO] [stderr]     Checking dashu-int v0.3.1
[INFO] [stderr]     Checking dashu-float v0.3.2
[INFO] [stderr]     Checking dashu-ratio v0.3.2
[INFO] [stderr]    Compiling dashu-macros v0.3.1
[INFO] [stderr]     Checking dashu v0.3.1
[INFO] [stderr]     Checking isomer v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.59s
[INFO] running `Command { std: "docker" "inspect" "9ea9a2abf54b48af89c97abaecc9d9606ba9f4222adb3b6ff797f59279ea0445", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ea9a2abf54b48af89c97abaecc9d9606ba9f4222adb3b6ff797f59279ea0445", kill_on_drop: false }`
[INFO] [stdout] 9ea9a2abf54b48af89c97abaecc9d9606ba9f4222adb3b6ff797f59279ea0445