[INFO] fetching crate fasttext 0.7.8...
[INFO] checking fasttext-0.7.8 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate fasttext 0.7.8 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate fasttext 0.7.8 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 fasttext 0.7.8
[INFO] finished tweaking crates.io crate fasttext 0.7.8
[INFO] tweaked toml for crates.io crate fasttext 0.7.8 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages
[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 cfasttext-sys v0.7.8
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0683ed2b66c65a774a7d5366aaa30f379a9af8ce311b311bf51840c43309d55
[INFO] running `Command { std: "docker" "start" "-a" "e0683ed2b66c65a774a7d5366aaa30f379a9af8ce311b311bf51840c43309d55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0683ed2b66c65a774a7d5366aaa30f379a9af8ce311b311bf51840c43309d55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0683ed2b66c65a774a7d5366aaa30f379a9af8ce311b311bf51840c43309d55", kill_on_drop: false }`
[INFO] [stdout] e0683ed2b66c65a774a7d5366aaa30f379a9af8ce311b311bf51840c43309d55
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bb8a5a3be8ab8464f941321f75dd3f689ac292c692dd7efeb49d8f61f8d03f6
[INFO] running `Command { std: "docker" "start" "-a" "2bb8a5a3be8ab8464f941321f75dd3f689ac292c692dd7efeb49d8f61f8d03f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfasttext-sys v0.7.8
[INFO] [stderr]     Checking fasttext v0.7.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.99s
[INFO] running `Command { std: "docker" "inspect" "2bb8a5a3be8ab8464f941321f75dd3f689ac292c692dd7efeb49d8f61f8d03f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bb8a5a3be8ab8464f941321f75dd3f689ac292c692dd7efeb49d8f61f8d03f6", kill_on_drop: false }`
[INFO] [stdout] 2bb8a5a3be8ab8464f941321f75dd3f689ac292c692dd7efeb49d8f61f8d03f6
[INFO] checking fasttext-0.7.8 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate fasttext 0.7.8 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate fasttext 0.7.8 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fasttext 0.7.8
[INFO] finished tweaking crates.io crate fasttext 0.7.8
[INFO] tweaked toml for crates.io crate fasttext 0.7.8 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1aaf68a7bf7cac61df42e6f49d9e8b9f241e15042c934e34431eedda62382645
[INFO] running `Command { std: "docker" "start" "-a" "1aaf68a7bf7cac61df42e6f49d9e8b9f241e15042c934e34431eedda62382645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1aaf68a7bf7cac61df42e6f49d9e8b9f241e15042c934e34431eedda62382645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1aaf68a7bf7cac61df42e6f49d9e8b9f241e15042c934e34431eedda62382645", kill_on_drop: false }`
[INFO] [stdout] 1aaf68a7bf7cac61df42e6f49d9e8b9f241e15042c934e34431eedda62382645
[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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d7618663191d6f800c027d8c0b924e2050204d9b1cca021efe7dd76618e8f02
[INFO] running `Command { std: "docker" "start" "-a" "1d7618663191d6f800c027d8c0b924e2050204d9b1cca021efe7dd76618e8f02", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfasttext-sys v0.7.8
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/cfasttext-sys-0.7.8/build.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         panic!();
[INFO] [stdout]    |         ^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cfasttext-sys` (build script) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "1d7618663191d6f800c027d8c0b924e2050204d9b1cca021efe7dd76618e8f02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d7618663191d6f800c027d8c0b924e2050204d9b1cca021efe7dd76618e8f02", kill_on_drop: false }`
[INFO] [stdout] 1d7618663191d6f800c027d8c0b924e2050204d9b1cca021efe7dd76618e8f02