[INFO] fetching crate enumx_derive 0.4.2...
[INFO] checking enumx_derive-0.4.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate enumx_derive 0.4.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate enumx_derive 0.4.2 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 enumx_derive 0.4.2
[INFO] finished tweaking crates.io crate enumx_derive 0.4.2
[INFO] tweaked toml for crates.io crate enumx_derive 0.4.2 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 8 packages
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[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] 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] efc73a80803f0768caa001f69f67ba3e57b833c66bb0f5aa24430a47b4051f36
[INFO] running `Command { std: "docker" "start" "-a" "efc73a80803f0768caa001f69f67ba3e57b833c66bb0f5aa24430a47b4051f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efc73a80803f0768caa001f69f67ba3e57b833c66bb0f5aa24430a47b4051f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efc73a80803f0768caa001f69f67ba3e57b833c66bb0f5aa24430a47b4051f36", kill_on_drop: false }`
[INFO] [stdout] efc73a80803f0768caa001f69f67ba3e57b833c66bb0f5aa24430a47b4051f36
[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] 91ebcdf8ddfa0cbc33d67a62a20eef9b40f895f08418a361a5951d345e1f976a
[INFO] running `Command { std: "docker" "start" "-a" "91ebcdf8ddfa0cbc33d67a62a20eef9b40f895f08418a361a5951d345e1f976a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking enumx_derive v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.89s
[INFO] running `Command { std: "docker" "inspect" "91ebcdf8ddfa0cbc33d67a62a20eef9b40f895f08418a361a5951d345e1f976a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91ebcdf8ddfa0cbc33d67a62a20eef9b40f895f08418a361a5951d345e1f976a", kill_on_drop: false }`
[INFO] [stdout] 91ebcdf8ddfa0cbc33d67a62a20eef9b40f895f08418a361a5951d345e1f976a
[INFO] checking enumx_derive-0.4.2 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate enumx_derive 0.4.2 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate enumx_derive 0.4.2 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 enumx_derive 0.4.2
[INFO] finished tweaking crates.io crate enumx_derive 0.4.2
[INFO] tweaked toml for crates.io crate enumx_derive 0.4.2 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] 5a240dae6b76381a8ac7aae94eb8a1e153759cb307124616786514a08b39dd49
[INFO] running `Command { std: "docker" "start" "-a" "5a240dae6b76381a8ac7aae94eb8a1e153759cb307124616786514a08b39dd49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a240dae6b76381a8ac7aae94eb8a1e153759cb307124616786514a08b39dd49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a240dae6b76381a8ac7aae94eb8a1e153759cb307124616786514a08b39dd49", kill_on_drop: false }`
[INFO] [stdout] 5a240dae6b76381a8ac7aae94eb8a1e153759cb307124616786514a08b39dd49
[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] e34fe3b8b28d816c2f03bf3c4cb7ea8f13d0e22cc4de7a2ab90be2f799b74dcb
[INFO] running `Command { std: "docker" "start" "-a" "e34fe3b8b28d816c2f03bf3c4cb7ea8f13d0e22cc4de7a2ab90be2f799b74dcb", kill_on_drop: false }`
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking enumx_derive v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]     --> src/lib.rs:1141:5
[INFO] [stdout]      |
[INFO] [stdout] 1141 | /     if let Some( item_enum ) = item_enum {
[INFO] [stdout] 1142 | |         let enum_ident = &item_enum.ident;
[INFO] [stdout] 1143 | |         iterative_impl.self_ty = Some( parse_quote!( #enum_ident ));
[INFO] [stdout] ...    |
[INFO] [stdout] 1183 | |         panic!( "{}", "The enum's variants are unknown to `def_impls!{}`. Consider using `_def!{}` to provide the variants of the enum de...
[INFO] [stdout] 1184 | |     };
[INFO] [stdout]      | |_____^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]     --> src/lib.rs:1141:5
[INFO] [stdout]      |
[INFO] [stdout] 1141 | /     if let Some( item_enum ) = item_enum {
[INFO] [stdout] 1142 | |         let enum_ident = &item_enum.ident;
[INFO] [stdout] 1143 | |         iterative_impl.self_ty = Some( parse_quote!( #enum_ident ));
[INFO] [stdout] ...    |
[INFO] [stdout] 1183 | |         panic!( "{}", "The enum's variants are unknown to `def_impls!{}`. Consider using `_def!{}` to provide the variants of the enum de...
[INFO] [stdout] 1184 | |     };
[INFO] [stdout]      | |_____^ cannot infer type
[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 `enumx_derive` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `enumx_derive` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e34fe3b8b28d816c2f03bf3c4cb7ea8f13d0e22cc4de7a2ab90be2f799b74dcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e34fe3b8b28d816c2f03bf3c4cb7ea8f13d0e22cc4de7a2ab90be2f799b74dcb", kill_on_drop: false }`
[INFO] [stdout] e34fe3b8b28d816c2f03bf3c4cb7ea8f13d0e22cc4de7a2ab90be2f799b74dcb