[INFO] fetching crate frc-value 0.1.4...
[INFO] checking frc-value-0.1.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate frc-value 0.1.4 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate frc-value 0.1.4 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 frc-value 0.1.4
[INFO] finished tweaking crates.io crate frc-value 0.1.4
[INFO] tweaked toml for crates.io crate frc-value 0.1.4 written to /workspace/builds/worker-2-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 46 packages
[INFO] [stderr]       Adding darling v0.11.0 (latest: v0.20.8)
[INFO] [stderr]       Adding darling_core v0.11.0 (latest: v0.20.8)
[INFO] [stderr]       Adding darling_macro v0.11.0 (latest: v0.20.8)
[INFO] [stderr]       Adding strsim v0.10.0 (latest: v0.11.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding uuid v0.8.2 (latest: v1.8.0)
[INFO] [stderr]       Adding variantly v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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 darling_macro v0.11.0
[INFO] [stderr]   Downloaded darling_core v0.11.0
[INFO] [stderr]   Downloaded rmpv v1.0.1
[INFO] [stderr]   Downloaded darling v0.11.0
[INFO] [stderr]   Downloaded variantly v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 237c30778d4657a05e5f346ee5728f6779583ebdc789368056a5f92ce9d63c83
[INFO] running `Command { std: "docker" "start" "-a" "237c30778d4657a05e5f346ee5728f6779583ebdc789368056a5f92ce9d63c83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "237c30778d4657a05e5f346ee5728f6779583ebdc789368056a5f92ce9d63c83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "237c30778d4657a05e5f346ee5728f6779583ebdc789368056a5f92ce9d63c83", kill_on_drop: false }`
[INFO] [stdout] 237c30778d4657a05e5f346ee5728f6779583ebdc789368056a5f92ce9d63c83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b2010a72ad0a8ca2808d06a8d64bcd286db7ca6169733869fd31cb6c6e226ab1
[INFO] running `Command { std: "docker" "start" "-a" "b2010a72ad0a8ca2808d06a8d64bcd286db7ca6169733869fd31cb6c6e226ab1", kill_on_drop: false }`
[INFO] [stderr]    Compiling protobuf v3.4.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling darling_core v0.11.0
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling darling_macro v0.11.0
[INFO] [stderr]    Compiling darling v0.11.0
[INFO] [stderr]    Compiling variantly v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking protobuf-support v3.4.0
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking frc-value v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.30s
[INFO] running `Command { std: "docker" "inspect" "b2010a72ad0a8ca2808d06a8d64bcd286db7ca6169733869fd31cb6c6e226ab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2010a72ad0a8ca2808d06a8d64bcd286db7ca6169733869fd31cb6c6e226ab1", kill_on_drop: false }`
[INFO] [stdout] b2010a72ad0a8ca2808d06a8d64bcd286db7ca6169733869fd31cb6c6e226ab1
[INFO] checking frc-value-0.1.4 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate frc-value 0.1.4 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate frc-value 0.1.4 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 frc-value 0.1.4
[INFO] finished tweaking crates.io crate frc-value 0.1.4
[INFO] tweaked toml for crates.io crate frc-value 0.1.4 written to /workspace/builds/worker-2-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 46 packages
[INFO] [stderr]       Adding darling v0.11.0 (latest: v0.20.8)
[INFO] [stderr]       Adding darling_core v0.11.0 (latest: v0.20.8)
[INFO] [stderr]       Adding darling_macro v0.11.0 (latest: v0.20.8)
[INFO] [stderr]       Adding strsim v0.10.0 (latest: v0.11.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding uuid v0.8.2 (latest: v1.8.0)
[INFO] [stderr]       Adding variantly v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] be11f93c1ebfc2d493fd833e6f6e851d08daeda755e0b03c81efc16982924a5f
[INFO] running `Command { std: "docker" "start" "-a" "be11f93c1ebfc2d493fd833e6f6e851d08daeda755e0b03c81efc16982924a5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be11f93c1ebfc2d493fd833e6f6e851d08daeda755e0b03c81efc16982924a5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be11f93c1ebfc2d493fd833e6f6e851d08daeda755e0b03c81efc16982924a5f", kill_on_drop: false }`
[INFO] [stdout] be11f93c1ebfc2d493fd833e6f6e851d08daeda755e0b03c81efc16982924a5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] f4074b63b9d9203fdb9e0996ed59ef52e05ecc0b4fb6e94dd7cef1bb7b67790e
[INFO] running `Command { std: "docker" "start" "-a" "f4074b63b9d9203fdb9e0996ed59ef52e05ecc0b4fb6e94dd7cef1bb7b67790e", kill_on_drop: false }`
[INFO] [stderr]    Compiling protobuf v3.4.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling darling_core v0.11.0
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling darling_macro v0.11.0
[INFO] [stderr]    Compiling darling v0.11.0
[INFO] [stderr]    Compiling variantly v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking protobuf-support v3.4.0
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking frc-value v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.07s
[INFO] running `Command { std: "docker" "inspect" "f4074b63b9d9203fdb9e0996ed59ef52e05ecc0b4fb6e94dd7cef1bb7b67790e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4074b63b9d9203fdb9e0996ed59ef52e05ecc0b4fb6e94dd7cef1bb7b67790e", kill_on_drop: false }`
[INFO] [stdout] f4074b63b9d9203fdb9e0996ed59ef52e05ecc0b4fb6e94dd7cef1bb7b67790e