[INFO] fetching crate iter-enum 1.1.1...
[INFO] checking iter-enum-1.1.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate iter-enum 1.1.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate iter-enum 1.1.1 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 iter-enum 1.1.1
[INFO] finished tweaking crates.io crate iter-enum 1.1.1
[INFO] tweaked toml for crates.io crate iter-enum 1.1.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages
[INFO] [stderr]       Adding derive_utils v0.13.2 (latest: v0.14.1)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded derive_utils v0.13.2
[INFO] [stderr]   Downloaded macrotest v1.0.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7821db06450ed7a35a82e8ca179f7ed3b4bf2bfdfd41b0509c78b3633cdace1f
[INFO] running `Command { std: "docker" "start" "-a" "7821db06450ed7a35a82e8ca179f7ed3b4bf2bfdfd41b0509c78b3633cdace1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7821db06450ed7a35a82e8ca179f7ed3b4bf2bfdfd41b0509c78b3633cdace1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7821db06450ed7a35a82e8ca179f7ed3b4bf2bfdfd41b0509c78b3633cdace1f", kill_on_drop: false }`
[INFO] [stdout] 7821db06450ed7a35a82e8ca179f7ed3b4bf2bfdfd41b0509c78b3633cdace1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 9365fd0680a17dd7e0ad83584b2e340c507d169cea1d04f8e34a24a6ee67e9db
[INFO] running `Command { std: "docker" "start" "-a" "9365fd0680a17dd7e0ad83584b2e340c507d169cea1d04f8e34a24a6ee67e9db", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling prettyplease v0.2.17
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking basic-toml v0.1.9
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v2.0.58
[INFO] [stderr]     Checking derive_utils v0.13.2
[INFO] [stderr]     Checking iter-enum v1.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking macrotest v1.0.11
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.27s
[INFO] running `Command { std: "docker" "inspect" "9365fd0680a17dd7e0ad83584b2e340c507d169cea1d04f8e34a24a6ee67e9db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9365fd0680a17dd7e0ad83584b2e340c507d169cea1d04f8e34a24a6ee67e9db", kill_on_drop: false }`
[INFO] [stdout] 9365fd0680a17dd7e0ad83584b2e340c507d169cea1d04f8e34a24a6ee67e9db
[INFO] checking iter-enum-1.1.1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate iter-enum 1.1.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate iter-enum 1.1.1 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate iter-enum 1.1.1
[INFO] finished tweaking crates.io crate iter-enum 1.1.1
[INFO] tweaked toml for crates.io crate iter-enum 1.1.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages
[INFO] [stderr]       Adding derive_utils v0.13.2 (latest: v0.14.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a25a1fb47c5237a2b75d165ed7a6e850a3922e627a864ee595e263e493a1a6f8
[INFO] running `Command { std: "docker" "start" "-a" "a25a1fb47c5237a2b75d165ed7a6e850a3922e627a864ee595e263e493a1a6f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a25a1fb47c5237a2b75d165ed7a6e850a3922e627a864ee595e263e493a1a6f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a25a1fb47c5237a2b75d165ed7a6e850a3922e627a864ee595e263e493a1a6f8", kill_on_drop: false }`
[INFO] [stdout] a25a1fb47c5237a2b75d165ed7a6e850a3922e627a864ee595e263e493a1a6f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 132957b246461ec430636ce24cb0eb74c4a758bc0c5097687399d8dbec31f2ea
[INFO] running `Command { std: "docker" "start" "-a" "132957b246461ec430636ce24cb0eb74c4a758bc0c5097687399d8dbec31f2ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling prettyplease v0.2.17
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking basic-toml v0.1.9
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking derive_utils v0.13.2
[INFO] [stderr]     Checking iter-enum v1.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking macrotest v1.0.11
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.35s
[INFO] running `Command { std: "docker" "inspect" "132957b246461ec430636ce24cb0eb74c4a758bc0c5097687399d8dbec31f2ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "132957b246461ec430636ce24cb0eb74c4a758bc0c5097687399d8dbec31f2ea", kill_on_drop: false }`
[INFO] [stdout] 132957b246461ec430636ce24cb0eb74c4a758bc0c5097687399d8dbec31f2ea