[INFO] fetching crate flowstdlib 0.142.0...
[INFO] checking flowstdlib-0.142.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate flowstdlib 0.142.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate flowstdlib 0.142.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flowstdlib 0.142.0
[INFO] finished tweaking crates.io crate flowstdlib 0.142.0
[INFO] tweaked toml for crates.io crate flowstdlib 0.142.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 74 packages
[INFO] [stderr]       Adding idna v0.2.3 (latest: v0.5.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding remove_dir_all v0.5.3 (latest: v0.8.2)
[INFO] [stderr]       Adding url v2.2.2 (latest: v2.5.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded flowmacro v0.142.0
[INFO] [stderr]   Downloaded curl v0.4.46
[INFO] [stderr]   Downloaded error-chain v0.12.4
[INFO] [stderr]   Downloaded unsafe-libyaml v0.2.11
[INFO] [stderr]   Downloaded serde_yaml v0.9.34+deprecated
[INFO] [stderr]   Downloaded flowcore v0.142.0
[INFO] [stderr]   Downloaded simpath v2.5.0
[INFO] [stderr]   Downloaded curl-sys v0.4.72+curl-8.6.0
[INFO] [stderr]   Downloaded libz-sys v1.1.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ca18e0b075200ef76459ff26f4fece8d070fb82538c26231fc5662a8a5d3376
[INFO] running `Command { std: "docker" "start" "-a" "4ca18e0b075200ef76459ff26f4fece8d070fb82538c26231fc5662a8a5d3376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ca18e0b075200ef76459ff26f4fece8d070fb82538c26231fc5662a8a5d3376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ca18e0b075200ef76459ff26f4fece8d070fb82538c26231fc5662a8a5d3376", kill_on_drop: false }`
[INFO] [stdout] 4ca18e0b075200ef76459ff26f4fece8d070fb82538c26231fc5662a8a5d3376
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2e755c1adca3546ce9ee77c9304ffd6a053f83b44bde40f208e66fcf86ca78a
[INFO] running `Command { std: "docker" "start" "-a" "e2e755c1adca3546ce9ee77c9304ffd6a053f83b44bde40f208e66fcf86ca78a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling curl v0.4.46
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling gimli v0.28.1
[INFO] [stderr]    Compiling curl-sys v0.4.72+curl-8.6.0
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling matches v0.1.10
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling miniz_oxide v0.7.2
[INFO] [stderr]    Compiling socket2 v0.5.6
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling winnow v0.6.5
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling rustc-demangle v0.1.23
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]    Compiling unsafe-libyaml v0.2.11
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling openssl-sys v0.9.102
[INFO] [stderr]    Compiling libz-sys v1.1.16
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling addr2line v0.21.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking serde_yaml v0.9.34+deprecated
[INFO] [stderr]     Checking toml_edit v0.22.9
[INFO] [stderr]     Checking simpath v2.5.0
[INFO] [stderr]     Checking toml v0.8.12
[INFO] [stderr]     Checking flowcore v0.142.0
[INFO] [stderr]    Compiling flowmacro v0.142.0
[INFO] [stderr]     Checking flowstdlib v0.142.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.11s
[INFO] running `Command { std: "docker" "inspect" "e2e755c1adca3546ce9ee77c9304ffd6a053f83b44bde40f208e66fcf86ca78a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2e755c1adca3546ce9ee77c9304ffd6a053f83b44bde40f208e66fcf86ca78a", kill_on_drop: false }`
[INFO] [stdout] e2e755c1adca3546ce9ee77c9304ffd6a053f83b44bde40f208e66fcf86ca78a