[INFO] fetching crate syn-select-next 0.3.0-alpha.1...
[INFO] checking syn-select-next-0.3.0-alpha.1 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate syn-select-next 0.3.0-alpha.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate syn-select-next 0.3.0-alpha.1
[INFO] finished tweaking crates.io crate syn-select-next 0.3.0-alpha.1
[INFO] tweaked toml for crates.io crate syn-select-next 0.3.0-alpha.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate syn-select-next 0.3.0-alpha.1 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1461201a5ca44d35e6ee78cfeb28325dbb7005f9a9caf11deea0514b3bf57e51
[INFO] running `Command { std: "docker" "start" "-a" "1461201a5ca44d35e6ee78cfeb28325dbb7005f9a9caf11deea0514b3bf57e51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1461201a5ca44d35e6ee78cfeb28325dbb7005f9a9caf11deea0514b3bf57e51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1461201a5ca44d35e6ee78cfeb28325dbb7005f9a9caf11deea0514b3bf57e51", kill_on_drop: false }`
[INFO] [stdout] 1461201a5ca44d35e6ee78cfeb28325dbb7005f9a9caf11deea0514b3bf57e51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 476743a07358ee502a8a0ea95a53a3248458fe9ed2e44cd9d4d02ca5e2811f4a
[INFO] running `Command { std: "docker" "start" "-a" "476743a07358ee502a8a0ea95a53a3248458fe9ed2e44cd9d4d02ca5e2811f4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.106
[INFO] [stderr]     Checking syn-select-next v0.3.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `syn::Item` doesn't implement `Debug`
[INFO] [stdout]    --> src/lib.rs:107:50
[INFO] [stdout]     |
[INFO] [stdout] 107 |             panic!("Result was wrong type {:?}", &result[0]);
[INFO] [stdout]     |                                           ----   ^^^^^^^^^^ `syn::Item` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           required by this formatting parameter
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `syn::Item`
[INFO] [stdout]     = note: required for `&syn::Item` to implement `Debug`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `syn::Item` doesn't implement `Debug`
[INFO] [stdout]    --> src/lib.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 118 |             panic!("Result was wrong type {:?}", &result[0]);
[INFO] [stdout]     |                                           ----   ^^^^^^^^^^ `syn::Item` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           required by this formatting parameter
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `syn::Item`
[INFO] [stdout]     = note: required for `&syn::Item` to implement `Debug`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0615]: attempted to take value of method `path` on type `Attribute`
[INFO] [stdout]    --> src/lib.rs:151:35
[INFO] [stdout]     |
[INFO] [stdout] 151 |             assert!(item.attrs[0].path.is_ident("doc"));
[INFO] [stdout]     |                                   ^^^^ method, not a field
[INFO] [stdout]     |
[INFO] [stdout] help: use parentheses to call the method
[INFO] [stdout]     |
[INFO] [stdout] 151 |             assert!(item.attrs[0].path().is_ident("doc"));
[INFO] [stdout]     |                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0615]: attempted to take value of method `path` on type `Attribute`
[INFO] [stdout]    --> src/lib.rs:152:35
[INFO] [stdout]     |
[INFO] [stdout] 152 |             assert!(item.attrs[1].path.is_ident("cfg"));
[INFO] [stdout]     |                                   ^^^^ method, not a field
[INFO] [stdout]     |
[INFO] [stdout] help: use parentheses to call the method
[INFO] [stdout]     |
[INFO] [stdout] 152 |             assert!(item.attrs[1].path().is_ident("cfg"));
[INFO] [stdout]     |                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0615]: attempted to take value of method `path` on type `Attribute`
[INFO] [stdout]    --> src/lib.rs:153:35
[INFO] [stdout]     |
[INFO] [stdout] 153 |             assert!(item.attrs[2].path.is_ident("serde"));
[INFO] [stdout]     |                                   ^^^^ method, not a field
[INFO] [stdout]     |
[INFO] [stdout] help: use parentheses to call the method
[INFO] [stdout]     |
[INFO] [stdout] 153 |             assert!(item.attrs[2].path().is_ident("serde"));
[INFO] [stdout]     |                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0615]: attempted to take value of method `path` on type `Attribute`
[INFO] [stdout]    --> src/lib.rs:154:35
[INFO] [stdout]     |
[INFO] [stdout] 154 |             assert!(item.attrs[3].path.is_ident("cfg"));
[INFO] [stdout]     |                                   ^^^^ method, not a field
[INFO] [stdout]     |
[INFO] [stdout] help: use parentheses to call the method
[INFO] [stdout]     |
[INFO] [stdout] 154 |             assert!(item.attrs[3].path().is_ident("cfg"));
[INFO] [stdout]     |                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0615]: attempted to take value of method `path` on type `Attribute`
[INFO] [stdout]    --> src/lib.rs:161:35
[INFO] [stdout]     |
[INFO] [stdout] 161 |             assert!(item.attrs[0].path.is_ident("cfg"));
[INFO] [stdout]     |                                   ^^^^ method, not a field
[INFO] [stdout]     |
[INFO] [stdout] help: use parentheses to call the method
[INFO] [stdout]     |
[INFO] [stdout] 161 |             assert!(item.attrs[0].path().is_ident("cfg"));
[INFO] [stdout]     |                                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0615.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syn-select-next` (lib test) due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "476743a07358ee502a8a0ea95a53a3248458fe9ed2e44cd9d4d02ca5e2811f4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "476743a07358ee502a8a0ea95a53a3248458fe9ed2e44cd9d4d02ca5e2811f4a", kill_on_drop: false }`
[INFO] [stdout] 476743a07358ee502a8a0ea95a53a3248458fe9ed2e44cd9d4d02ca5e2811f4a