[INFO] fetching crate distro-keyring 0.1.0...
[INFO] checking distro-keyring-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate distro-keyring 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate distro-keyring 0.1.0 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 distro-keyring 0.1.0
[INFO] finished tweaking crates.io crate distro-keyring 0.1.0
[INFO] tweaked toml for crates.io crate distro-keyring 0.1.0 written to /workspace/builds/worker-0-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 43 packages
[INFO] [stderr]       Adding base64 v0.10.1 (latest: v0.22.0)
[INFO] [stderr]       Adding block-buffer v0.7.3 (latest: v0.10.4)
[INFO] [stderr]       Adding block-padding v0.1.5 (latest: v0.3.3)
[INFO] [stderr]       Adding digest v0.8.1 (latest: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.12.4 (latest: v1.0.0)
[INFO] [stderr]       Adding gpgrv v0.1.1 (latest: v0.4.1)
[INFO] [stderr]       Adding hex v0.3.2 (latest: v0.4.3)
[INFO] [stderr]       Adding iowrap v0.1.2 (latest: v0.2.1)
[INFO] [stderr]       Adding num v0.2.1 (latest: v0.4.1)
[INFO] [stderr]       Adding num-bigint v0.2.6 (latest: v0.4.4)
[INFO] [stderr]       Adding num-complex v0.2.4 (latest: v0.4.5)
[INFO] [stderr]       Adding num-rational v0.2.4 (latest: v0.4.1)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding opaque-debug v0.2.3 (latest: v0.3.1)
[INFO] [stderr]       Adding sha-1 v0.8.2 (latest: v0.10.1)
[INFO] [stderr]       Adding sha2 v0.8.2 (latest: v0.10.8)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hex v0.3.2
[INFO] [stderr]   Downloaded iowrap v0.1.2
[INFO] [stderr]   Downloaded gpgrv v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 723ad9a332462c64dde2a780cd8e3abba0dacec6b7b4ea22bf9ec68924a1be4f
[INFO] running `Command { std: "docker" "start" "-a" "723ad9a332462c64dde2a780cd8e3abba0dacec6b7b4ea22bf9ec68924a1be4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "723ad9a332462c64dde2a780cd8e3abba0dacec6b7b4ea22bf9ec68924a1be4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "723ad9a332462c64dde2a780cd8e3abba0dacec6b7b4ea22bf9ec68924a1be4f", kill_on_drop: false }`
[INFO] [stdout] 723ad9a332462c64dde2a780cd8e3abba0dacec6b7b4ea22bf9ec68924a1be4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 72ca4b198d940af7f9ec62c6c6dbbb327c7bf15f941d3f101a0ec64031a34878
[INFO] running `Command { std: "docker" "start" "-a" "72ca4b198d940af7f9ec62c6c6dbbb327c7bf15f941d3f101a0ec64031a34878", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking iowrap v0.1.2
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking distro-keyring v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking gpgrv v0.1.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.86s
[INFO] running `Command { std: "docker" "inspect" "72ca4b198d940af7f9ec62c6c6dbbb327c7bf15f941d3f101a0ec64031a34878", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72ca4b198d940af7f9ec62c6c6dbbb327c7bf15f941d3f101a0ec64031a34878", kill_on_drop: false }`
[INFO] [stdout] 72ca4b198d940af7f9ec62c6c6dbbb327c7bf15f941d3f101a0ec64031a34878
[INFO] checking distro-keyring-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate distro-keyring 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate distro-keyring 0.1.0 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 distro-keyring 0.1.0
[INFO] finished tweaking crates.io crate distro-keyring 0.1.0
[INFO] tweaked toml for crates.io crate distro-keyring 0.1.0 written to /workspace/builds/worker-0-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 43 packages
[INFO] [stderr]       Adding base64 v0.10.1 (latest: v0.22.0)
[INFO] [stderr]       Adding block-buffer v0.7.3 (latest: v0.10.4)
[INFO] [stderr]       Adding block-padding v0.1.5 (latest: v0.3.3)
[INFO] [stderr]       Adding digest v0.8.1 (latest: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.12.4 (latest: v1.0.0)
[INFO] [stderr]       Adding gpgrv v0.1.1 (latest: v0.4.1)
[INFO] [stderr]       Adding hex v0.3.2 (latest: v0.4.3)
[INFO] [stderr]       Adding iowrap v0.1.2 (latest: v0.2.1)
[INFO] [stderr]       Adding num v0.2.1 (latest: v0.4.1)
[INFO] [stderr]       Adding num-bigint v0.2.6 (latest: v0.4.4)
[INFO] [stderr]       Adding num-complex v0.2.4 (latest: v0.4.5)
[INFO] [stderr]       Adding num-rational v0.2.4 (latest: v0.4.1)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding opaque-debug v0.2.3 (latest: v0.3.1)
[INFO] [stderr]       Adding sha-1 v0.8.2 (latest: v0.10.1)
[INFO] [stderr]       Adding sha2 v0.8.2 (latest: v0.10.8)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 56331830e9f4da265e5d3a8e1ff61d8159257ee2052061b34513bf00869f2196
[INFO] running `Command { std: "docker" "start" "-a" "56331830e9f4da265e5d3a8e1ff61d8159257ee2052061b34513bf00869f2196", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56331830e9f4da265e5d3a8e1ff61d8159257ee2052061b34513bf00869f2196", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56331830e9f4da265e5d3a8e1ff61d8159257ee2052061b34513bf00869f2196", kill_on_drop: false }`
[INFO] [stdout] 56331830e9f4da265e5d3a8e1ff61d8159257ee2052061b34513bf00869f2196
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 635d951077ba8d68d07d2032ddff9e2cc78194635fd6c175e26e5bc68607201d
[INFO] running `Command { std: "docker" "start" "-a" "635d951077ba8d68d07d2032ddff9e2cc78194635fd6c175e26e5bc68607201d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking iowrap v0.1.2
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking distro-keyring v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking gpgrv v0.1.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.53s
[INFO] running `Command { std: "docker" "inspect" "635d951077ba8d68d07d2032ddff9e2cc78194635fd6c175e26e5bc68607201d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "635d951077ba8d68d07d2032ddff9e2cc78194635fd6c175e26e5bc68607201d", kill_on_drop: false }`
[INFO] [stdout] 635d951077ba8d68d07d2032ddff9e2cc78194635fd6c175e26e5bc68607201d