[INFO] fetching crate uf2_block 0.1.0...
[INFO] checking uf2_block-0.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate uf2_block 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate uf2_block 0.1.0 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 uf2_block 0.1.0
[INFO] finished tweaking crates.io crate uf2_block 0.1.0
[INFO] tweaked toml for crates.io crate uf2_block 0.1.0 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 9 packages
[INFO] [stderr]       Adding packing v0.1.0 (latest: v0.2.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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 bitmask v0.5.0
[INFO] [stderr]   Downloaded packing_codegen v0.1.0
[INFO] [stderr]   Downloaded packing v0.1.0
[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] 0af8774af129527ab8fcb478738ce8116e9add1443b59c40ebfadd37b2a9e706
[INFO] running `Command { std: "docker" "start" "-a" "0af8774af129527ab8fcb478738ce8116e9add1443b59c40ebfadd37b2a9e706", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0af8774af129527ab8fcb478738ce8116e9add1443b59c40ebfadd37b2a9e706", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0af8774af129527ab8fcb478738ce8116e9add1443b59c40ebfadd37b2a9e706", kill_on_drop: false }`
[INFO] [stdout] 0af8774af129527ab8fcb478738ce8116e9add1443b59c40ebfadd37b2a9e706
[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] e93103a97ee036d3b370f654e0b97aa09b65979a15d8af5fcfbf53cbbedccdb9
[INFO] running `Command { std: "docker" "start" "-a" "e93103a97ee036d3b370f654e0b97aa09b65979a15d8af5fcfbf53cbbedccdb9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking bitmask v0.5.0
[INFO] [stderr]    Compiling packing_codegen v0.1.0
[INFO] [stderr]     Checking packing v0.1.0
[INFO] [stderr]     Checking uf2_block v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.59s
[INFO] running `Command { std: "docker" "inspect" "e93103a97ee036d3b370f654e0b97aa09b65979a15d8af5fcfbf53cbbedccdb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e93103a97ee036d3b370f654e0b97aa09b65979a15d8af5fcfbf53cbbedccdb9", kill_on_drop: false }`
[INFO] [stdout] e93103a97ee036d3b370f654e0b97aa09b65979a15d8af5fcfbf53cbbedccdb9
[INFO] checking uf2_block-0.1.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate uf2_block 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate uf2_block 0.1.0 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 uf2_block 0.1.0
[INFO] finished tweaking crates.io crate uf2_block 0.1.0
[INFO] tweaked toml for crates.io crate uf2_block 0.1.0 written to /workspace/builds/worker-6-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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 771476a5d5583e5ec8a09845e0b0c4a38b111e3a1a0fcd2e7642e048947c6ea6
[INFO] running `Command { std: "docker" "start" "-a" "771476a5d5583e5ec8a09845e0b0c4a38b111e3a1a0fcd2e7642e048947c6ea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "771476a5d5583e5ec8a09845e0b0c4a38b111e3a1a0fcd2e7642e048947c6ea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "771476a5d5583e5ec8a09845e0b0c4a38b111e3a1a0fcd2e7642e048947c6ea6", kill_on_drop: false }`
[INFO] [stdout] 771476a5d5583e5ec8a09845e0b0c4a38b111e3a1a0fcd2e7642e048947c6ea6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 3793dfac3256b614a3f024ffae611424339bdffea989d2044d55678b88b571d7
[INFO] running `Command { std: "docker" "start" "-a" "3793dfac3256b614a3f024ffae611424339bdffea989d2044d55678b88b571d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking bitmask v0.5.0
[INFO] [stderr]    Compiling packing_codegen v0.1.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/packing_codegen-0.1.0/src/lib.rs:157:25
[INFO] [stdout]     |
[INFO] [stdout] 157 | ...   Err(Error::new(l.path.span(), "pkd abbreviated attribute expects exactly 4 values: #[pkd(<start_bit>, <end_bit>, <start_byte>, <end...
[INFO] [stdout]     |       ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 157 |                         Err::<T, syn::Error>(Error::new(l.path.span(), "pkd abbreviated attribute expects exactly 4 values: #[pkd(<start_bit>, <end_bit>, <start_byte>, <end_byte>)]"))?;
[INFO] [stdout]     |                            +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/packing_codegen-0.1.0/src/lib.rs:612:17
[INFO] [stdout]     |
[INFO] [stdout] 612 |                 Err(Error::new(field.end_bit.0.unwrap().1, 
[INFO] [stdout]     |                 ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 612 |                 Err::<T, syn::Error>(Error::new(field.end_bit.0.unwrap().1, 
[INFO] [stdout]     |                    +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/packing_codegen-0.1.0/src/lib.rs:883:13
[INFO] [stdout]     |
[INFO] [stdout] 883 |             Err(Error::new(ident.span(), "Only unit variants supported by Packed derive"))?;
[INFO] [stdout]     |             ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 883 |             Err::<T, syn::Error>(Error::new(ident.span(), "Only unit variants supported by Packed derive"))?;
[INFO] [stdout]     |                +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `packing_codegen` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "3793dfac3256b614a3f024ffae611424339bdffea989d2044d55678b88b571d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3793dfac3256b614a3f024ffae611424339bdffea989d2044d55678b88b571d7", kill_on_drop: false }`
[INFO] [stdout] 3793dfac3256b614a3f024ffae611424339bdffea989d2044d55678b88b571d7