[INFO] fetching crate cxx-swift-build 0.0.1...
[INFO] checking cxx-swift-build-0.0.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate cxx-swift-build 0.0.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate cxx-swift-build 0.0.1 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 cxx-swift-build 0.0.1
[INFO] finished tweaking crates.io crate cxx-swift-build 0.0.1
[INFO] tweaked toml for crates.io crate cxx-swift-build 0.0.1 written to /workspace/builds/worker-4-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 36 packages
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding snafu v0.7.5 (latest: v0.8.2)
[INFO] [stderr]       Adding snafu-derive v0.7.5 (latest: v0.8.2)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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 doc-comment v0.3.3
[INFO] [stderr]   Downloaded normpath v1.2.0
[INFO] [stderr]   Downloaded snafu v0.7.5
[INFO] [stderr]   Downloaded cxx-clang-build v0.0.1
[INFO] [stderr]   Downloaded scratch v1.0.7
[INFO] [stderr]   Downloaded cxx-build v1.0.120
[INFO] [stderr]   Downloaded cxx-llvm-build v0.0.3
[INFO] [stderr]   Downloaded cxx-llvm-build-common v0.0.3
[INFO] [stderr]   Downloaded snafu-derive v0.7.5
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41f82651312ef029d14ff745ba91a7cb8c0a303aa9403cd9d9f996f379b3b9d2
[INFO] running `Command { std: "docker" "start" "-a" "41f82651312ef029d14ff745ba91a7cb8c0a303aa9403cd9d9f996f379b3b9d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41f82651312ef029d14ff745ba91a7cb8c0a303aa9403cd9d9f996f379b3b9d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41f82651312ef029d14ff745ba91a7cb8c0a303aa9403cd9d9f996f379b3b9d2", kill_on_drop: false }`
[INFO] [stdout] 41f82651312ef029d14ff745ba91a7cb8c0a303aa9403cd9d9f996f379b3b9d2
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0ea0af97988e6637a5aed436601d1046d93a9826092efb25b4237bff456b036
[INFO] running `Command { std: "docker" "start" "-a" "e0ea0af97988e6637a5aed436601d1046d93a9826092efb25b4237bff456b036", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling scratch v1.0.7
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking jobserver v0.1.28
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking normpath v1.2.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking cc v1.0.90
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]     Checking cxx-llvm-build-common v0.0.3
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v2.0.58
[INFO] [stderr]    Compiling snafu-derive v0.7.5
[INFO] [stderr]     Checking cxx-build v1.0.120
[INFO] [stderr]     Checking cxx-llvm-build v0.0.3
[INFO] [stderr]     Checking cxx-clang-build v0.0.1
[INFO] [stderr]     Checking snafu v0.7.5
[INFO] [stderr]     Checking cxx-swift-build v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.82s
[INFO] running `Command { std: "docker" "inspect" "e0ea0af97988e6637a5aed436601d1046d93a9826092efb25b4237bff456b036", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0ea0af97988e6637a5aed436601d1046d93a9826092efb25b4237bff456b036", kill_on_drop: false }`
[INFO] [stdout] e0ea0af97988e6637a5aed436601d1046d93a9826092efb25b4237bff456b036
[INFO] checking cxx-swift-build-0.0.1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate cxx-swift-build 0.0.1 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate cxx-swift-build 0.0.1 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 cxx-swift-build 0.0.1
[INFO] finished tweaking crates.io crate cxx-swift-build 0.0.1
[INFO] tweaked toml for crates.io crate cxx-swift-build 0.0.1 written to /workspace/builds/worker-4-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 36 packages
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding snafu v0.7.5 (latest: v0.8.2)
[INFO] [stderr]       Adding snafu-derive v0.7.5 (latest: v0.8.2)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] c8d677b3169c3f87c3c1180ae751dd7d367ca8dae67b02db2fcbb693fc2e8e87
[INFO] running `Command { std: "docker" "start" "-a" "c8d677b3169c3f87c3c1180ae751dd7d367ca8dae67b02db2fcbb693fc2e8e87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8d677b3169c3f87c3c1180ae751dd7d367ca8dae67b02db2fcbb693fc2e8e87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8d677b3169c3f87c3c1180ae751dd7d367ca8dae67b02db2fcbb693fc2e8e87", kill_on_drop: false }`
[INFO] [stdout] c8d677b3169c3f87c3c1180ae751dd7d367ca8dae67b02db2fcbb693fc2e8e87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 4e222072e14ef59a734a7aed0aab2fe0371a169b5d8182c3aab2ec3b65ef9c11
[INFO] running `Command { std: "docker" "start" "-a" "4e222072e14ef59a734a7aed0aab2fe0371a169b5d8182c3aab2ec3b65ef9c11", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling scratch v1.0.7
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking jobserver v0.1.28
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking normpath v1.2.0
[INFO] [stderr]     Checking cc v1.0.90
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking cxx-llvm-build-common v0.0.3
[INFO] [stderr]     Checking syn v2.0.58
[INFO] [stderr]     Checking cxx-build v1.0.120
[INFO] [stderr]    Compiling snafu-derive v0.7.5
[INFO] [stderr]     Checking cxx-llvm-build v0.0.3
[INFO] [stderr]     Checking cxx-clang-build v0.0.1
[INFO] [stderr]     Checking snafu v0.7.5
[INFO] [stderr]     Checking cxx-swift-build v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.17s
[INFO] running `Command { std: "docker" "inspect" "4e222072e14ef59a734a7aed0aab2fe0371a169b5d8182c3aab2ec3b65ef9c11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e222072e14ef59a734a7aed0aab2fe0371a169b5d8182c3aab2ec3b65ef9c11", kill_on_drop: false }`
[INFO] [stdout] 4e222072e14ef59a734a7aed0aab2fe0371a169b5d8182c3aab2ec3b65ef9c11