[INFO] fetching crate xot 0.17.0...
[INFO] checking xot-0.17.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate xot 0.17.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate xot 0.17.0 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 xot 0.17.0
[INFO] finished tweaking crates.io crate xot 0.17.0
[INFO] tweaked toml for crates.io crate xot 0.17.0 written to /workspace/builds/worker-7-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 78 packages
[INFO] [stderr]       Adding encode_unicode v0.3.6 (latest: v1.0.0)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding quick-error v1.2.3 (latest: v2.0.1)
[INFO] [stderr]       Adding rstest v0.16.0 (latest: v0.18.2)
[INFO] [stderr]       Adding rstest_macros v0.16.0 (latest: v0.18.2)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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 unwind_safe v0.1.0
[INFO] [stderr]   Downloaded next-gen-proc_macros v0.1.1
[INFO] [stderr]   Downloaded xhtmlchardet v2.2.0
[INFO] [stderr]   Downloaded next-gen v0.1.1
[INFO] [stderr]   Downloaded indextree v4.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e540469446591e795de08dc48c6e0b4c818a499c53cab30a9862bea9638944dd
[INFO] running `Command { std: "docker" "start" "-a" "e540469446591e795de08dc48c6e0b4c818a499c53cab30a9862bea9638944dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e540469446591e795de08dc48c6e0b4c818a499c53cab30a9862bea9638944dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e540469446591e795de08dc48c6e0b4c818a499c53cab30a9862bea9638944dd", kill_on_drop: false }`
[INFO] [stdout] e540469446591e795de08dc48c6e0b4c818a499c53cab30a9862bea9638944dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] f83a30d6c1396a57d1833e63e1c06f33c2c1659618df51b6112687bfbf35499b
[INFO] running `Command { std: "docker" "start" "-a" "f83a30d6c1396a57d1833e63e1c06f33c2c1659618df51b6112687bfbf35499b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking unwind_safe v0.1.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling rstest_macros v0.16.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking console v0.15.8
[INFO] [stderr]     Checking unarray v0.1.4
[INFO] [stderr]     Checking futures-timer v3.0.3
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking xhtmlchardet v2.2.0
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking similar v2.5.0
[INFO] [stderr]     Checking indextree v4.6.1
[INFO] [stderr]     Checking xmlparser v0.13.6
[INFO] [stderr]     Checking insta v1.38.0
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking proptest v1.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling next-gen-proc_macros v0.1.1
[INFO] [stderr]     Checking next-gen v0.1.1
[INFO] [stderr]     Checking xot v0.17.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking rstest v0.16.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.99s
[INFO] running `Command { std: "docker" "inspect" "f83a30d6c1396a57d1833e63e1c06f33c2c1659618df51b6112687bfbf35499b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f83a30d6c1396a57d1833e63e1c06f33c2c1659618df51b6112687bfbf35499b", kill_on_drop: false }`
[INFO] [stdout] f83a30d6c1396a57d1833e63e1c06f33c2c1659618df51b6112687bfbf35499b
[INFO] checking xot-0.17.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate xot 0.17.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate xot 0.17.0 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 xot 0.17.0
[INFO] finished tweaking crates.io crate xot 0.17.0
[INFO] tweaked toml for crates.io crate xot 0.17.0 written to /workspace/builds/worker-7-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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 79fcf828e72881cd4aa94a7515c5f4b72b75c6601928cd7dd7cd49a99e758de3
[INFO] running `Command { std: "docker" "start" "-a" "79fcf828e72881cd4aa94a7515c5f4b72b75c6601928cd7dd7cd49a99e758de3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79fcf828e72881cd4aa94a7515c5f4b72b75c6601928cd7dd7cd49a99e758de3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79fcf828e72881cd4aa94a7515c5f4b72b75c6601928cd7dd7cd49a99e758de3", kill_on_drop: false }`
[INFO] [stdout] 79fcf828e72881cd4aa94a7515c5f4b72b75c6601928cd7dd7cd49a99e758de3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 9c4b1f1c4381a8f1c78147fbac7116c367af17dd1d84e55c950a6edd45bfef61
[INFO] running `Command { std: "docker" "start" "-a" "9c4b1f1c4381a8f1c78147fbac7116c367af17dd1d84e55c950a6edd45bfef61", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking slab v0.4.9
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling rstest_macros v0.16.0
[INFO] [stderr]     Checking unwind_safe v0.1.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking console v0.15.8
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking encoding_rs v0.8.33
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking xmlparser v0.13.6
[INFO] [stderr]     Checking indextree v4.6.1
[INFO] [stderr]     Checking unarray v0.1.4
[INFO] [stderr]     Checking futures-timer v3.0.3
[INFO] [stderr]     Checking xhtmlchardet v2.2.0
[INFO] [stderr]     Checking similar v2.5.0
[INFO] [stderr]     Checking insta v1.38.0
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking proptest v1.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling next-gen-proc_macros v0.1.1
[INFO] [stderr]     Checking next-gen v0.1.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/next-gen-0.1.1/src/utils/macros.rs:10:50
[INFO] [stdout]     |
[INFO] [stdout] 10  |   macro_rules! abort_with_msg {( $($msg:tt)* ) => ({
[INFO] [stdout]     |  __________________________________________________^
[INFO] [stdout] 11  | |     let () =
[INFO] [stdout] 12  | |         $crate::__::unwind_safe::with_state(())
[INFO] [stdout] 13  | |             .try_eval(|()| $crate::__::core::panic!($($msg)*))
[INFO] [stdout] ...   |
[INFO] [stdout] 16  | |     loop {}
[INFO] [stdout] 17  | | })} pub(in crate) use abort_with_msg;
[INFO] [stdout]     | |_^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/next-gen-0.1.1/src/generator_fn.rs:291:17
[INFO] [stdout]     |
[INFO] [stdout] 291 | /                 macros::abort_with_msg!("\
[INFO] [stdout] 292 | |                     `::next_gen` fatal runtime error: \
[INFO] [stdout] 293 | |                     a `YieldSlot` was about to dangle!\
[INFO] [stdout] 294 | |                     \n\
[INFO] [stdout] ...   |
[INFO] [stdout] 301 | |                     the program will now abort.\
[INFO] [stdout] 302 | |                 ");
[INFO] [stdout]     | |__________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `macros::abort_with_msg` (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 `next-gen` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9c4b1f1c4381a8f1c78147fbac7116c367af17dd1d84e55c950a6edd45bfef61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c4b1f1c4381a8f1c78147fbac7116c367af17dd1d84e55c950a6edd45bfef61", kill_on_drop: false }`
[INFO] [stdout] 9c4b1f1c4381a8f1c78147fbac7116c367af17dd1d84e55c950a6edd45bfef61