[INFO] fetching crate cxx-build 1.0.110...
[INFO] checking cxx-build-1.0.110 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate cxx-build 1.0.110 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate cxx-build 1.0.110 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-build 1.0.110
[INFO] finished tweaking crates.io crate cxx-build 1.0.110
[INFO] tweaked toml for crates.io crate cxx-build 1.0.110 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] 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 scratch v1.0.7
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.120
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.120
[INFO] [stderr]   Downloaded link-cplusplus v1.0.9
[INFO] [stderr]   Downloaded cxx v1.0.120
[INFO] [stderr]   Downloaded cxx-gen v0.7.120
[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] 33c9cc00b427923c9ca751e859d73d72d545e49def86532209d9e0cdb2f225f4
[INFO] running `Command { std: "docker" "start" "-a" "33c9cc00b427923c9ca751e859d73d72d545e49def86532209d9e0cdb2f225f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33c9cc00b427923c9ca751e859d73d72d545e49def86532209d9e0cdb2f225f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33c9cc00b427923c9ca751e859d73d72d545e49def86532209d9e0cdb2f225f4", kill_on_drop: false }`
[INFO] [stdout] 33c9cc00b427923c9ca751e859d73d72d545e49def86532209d9e0cdb2f225f4
[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] 6049cf6e1985496527361b230e56c98a1afcb3152cc2b530cb02cd691224fd82
[INFO] running `Command { std: "docker" "start" "-a" "6049cf6e1985496527361b230e56c98a1afcb3152cc2b530cb02cd691224fd82", 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 link-cplusplus v1.0.9
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]    Compiling cxxbridge-flags v1.0.120
[INFO] [stderr]     Checking cc v1.0.90
[INFO] [stderr]     Checking pkg-config v0.3.30
[INFO] [stderr]    Compiling cxxbridge-macro v1.0.120
[INFO] [stderr]    Compiling cxx v1.0.120
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v2.0.58
[INFO] [stderr]     Checking cxx-gen v0.7.120
[INFO] [stderr]     Checking cxx-build v1.0.110 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.79s
[INFO] running `Command { std: "docker" "inspect" "6049cf6e1985496527361b230e56c98a1afcb3152cc2b530cb02cd691224fd82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6049cf6e1985496527361b230e56c98a1afcb3152cc2b530cb02cd691224fd82", kill_on_drop: false }`
[INFO] [stdout] 6049cf6e1985496527361b230e56c98a1afcb3152cc2b530cb02cd691224fd82
[INFO] checking cxx-build-1.0.110 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate cxx-build 1.0.110 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate cxx-build 1.0.110 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-build 1.0.110
[INFO] finished tweaking crates.io crate cxx-build 1.0.110
[INFO] tweaked toml for crates.io crate cxx-build 1.0.110 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] 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-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] 85e31eac9a2480c6030b0c26b775e23b3a8a393e237fdaa7d879e6567054043a
[INFO] running `Command { std: "docker" "start" "-a" "85e31eac9a2480c6030b0c26b775e23b3a8a393e237fdaa7d879e6567054043a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85e31eac9a2480c6030b0c26b775e23b3a8a393e237fdaa7d879e6567054043a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85e31eac9a2480c6030b0c26b775e23b3a8a393e237fdaa7d879e6567054043a", kill_on_drop: false }`
[INFO] [stdout] 85e31eac9a2480c6030b0c26b775e23b3a8a393e237fdaa7d879e6567054043a
[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] 339a5b0bd097f7ba4d092a55517bab3ec427497fb5d0597d1ac16ece0977d76e
[INFO] running `Command { std: "docker" "start" "-a" "339a5b0bd097f7ba4d092a55517bab3ec427497fb5d0597d1ac16ece0977d76e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling cxxbridge-flags v1.0.120
[INFO] [stderr]    Compiling scratch v1.0.7
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking cc v1.0.90
[INFO] [stderr]     Checking pkg-config v0.3.30
[INFO] [stderr]    Compiling link-cplusplus v1.0.9
[INFO] [stderr]    Compiling cxxbridge-macro v1.0.120
[INFO] [stderr]    Compiling cxx v1.0.120
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v2.0.58
[INFO] [stderr]     Checking cxx-gen v0.7.120
[INFO] [stderr]     Checking cxx-build v1.0.110 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.04s
[INFO] running `Command { std: "docker" "inspect" "339a5b0bd097f7ba4d092a55517bab3ec427497fb5d0597d1ac16ece0977d76e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "339a5b0bd097f7ba4d092a55517bab3ec427497fb5d0597d1ac16ece0977d76e", kill_on_drop: false }`
[INFO] [stdout] 339a5b0bd097f7ba4d092a55517bab3ec427497fb5d0597d1ac16ece0977d76e