[INFO] fetching crate chalk-rust-ir 0.10.0...
[INFO] checking chalk-rust-ir-0.10.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate chalk-rust-ir 0.10.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate chalk-rust-ir 0.10.0 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 chalk-rust-ir 0.10.0
[INFO] finished tweaking crates.io crate chalk-rust-ir 0.10.0
[INFO] tweaked toml for crates.io crate chalk-rust-ir 0.10.0 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 13 packages
[INFO] [stderr]       Adding chalk-derive v0.10.0 (latest: v0.96.0)
[INFO] [stderr]       Adding chalk-engine v0.10.0 (latest: v0.96.0)
[INFO] [stderr]       Adding chalk-ir v0.10.0 (latest: v0.96.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[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 chalk-derive v0.10.0
[INFO] [stderr]   Downloaded chalk-macros v0.10.0
[INFO] [stderr]   Downloaded chalk-engine v0.10.0
[INFO] [stderr]   Downloaded chalk-ir v0.10.0
[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] 3d0180ac1ca97455af6d5545e27429ae47dd5229782e00c72d92aee5d8ff72ca
[INFO] running `Command { std: "docker" "start" "-a" "3d0180ac1ca97455af6d5545e27429ae47dd5229782e00c72d92aee5d8ff72ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d0180ac1ca97455af6d5545e27429ae47dd5229782e00c72d92aee5d8ff72ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d0180ac1ca97455af6d5545e27429ae47dd5229782e00c72d92aee5d8ff72ca", kill_on_drop: false }`
[INFO] [stdout] 3d0180ac1ca97455af6d5545e27429ae47dd5229782e00c72d92aee5d8ff72ca
[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] df2c4e7f0dc5b1675e2943bc9745802bb07e9aff24f3374f8b87f1ba281e431f
[INFO] running `Command { std: "docker" "start" "-a" "df2c4e7f0dc5b1675e2943bc9745802bb07e9aff24f3374f8b87f1ba281e431f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking chalk-macros v0.10.0
[INFO] [stderr]     Checking chalk-engine v0.10.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling chalk-derive v0.10.0
[INFO] [stderr]     Checking chalk-ir v0.10.0
[INFO] [stderr]     Checking chalk-rust-ir v0.10.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.77s
[INFO] running `Command { std: "docker" "inspect" "df2c4e7f0dc5b1675e2943bc9745802bb07e9aff24f3374f8b87f1ba281e431f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df2c4e7f0dc5b1675e2943bc9745802bb07e9aff24f3374f8b87f1ba281e431f", kill_on_drop: false }`
[INFO] [stdout] df2c4e7f0dc5b1675e2943bc9745802bb07e9aff24f3374f8b87f1ba281e431f
[INFO] checking chalk-rust-ir-0.10.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate chalk-rust-ir 0.10.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate chalk-rust-ir 0.10.0 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 chalk-rust-ir 0.10.0
[INFO] finished tweaking crates.io crate chalk-rust-ir 0.10.0
[INFO] tweaked toml for crates.io crate chalk-rust-ir 0.10.0 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] c925f6b35754d5cdc51d3217964868e3037b514c2848a5d352992f324b48e223
[INFO] running `Command { std: "docker" "start" "-a" "c925f6b35754d5cdc51d3217964868e3037b514c2848a5d352992f324b48e223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c925f6b35754d5cdc51d3217964868e3037b514c2848a5d352992f324b48e223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c925f6b35754d5cdc51d3217964868e3037b514c2848a5d352992f324b48e223", kill_on_drop: false }`
[INFO] [stdout] c925f6b35754d5cdc51d3217964868e3037b514c2848a5d352992f324b48e223
[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] f8316d644ac9190f9bc934273e3bded87bd2f8d8ac2f07336c181cca469ce376
[INFO] running `Command { std: "docker" "start" "-a" "f8316d644ac9190f9bc934273e3bded87bd2f8d8ac2f07336c181cca469ce376", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking chalk-macros v0.10.0
[INFO] [stderr]     Checking chalk-engine v0.10.0
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/chalk-engine-0.10.0/src/logic.rs:584:17
[INFO] [stdout]     |
[INFO] [stdout] 584 | /                 match strand.infer.apply_answer_subst(
[INFO] [stdout] 585 | |                     self.context.interner(),
[INFO] [stdout] 586 | |                     &mut strand.ex_clause,
[INFO] [stdout] 587 | |                     &subgoal,
[INFO] [stdout] ...   |
[INFO] [stdout] 626 | |                     }
[INFO] [stdout] 627 | |                 }
[INFO] [stdout]     | |_________________^ cannot satisfy `_ -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/chalk-engine-0.10.0/src/logic.rs:937:17
[INFO] [stdout]     |
[INFO] [stdout] 937 | /                 match self.merge_answer_into_strand(&mut caller_strand) {
[INFO] [stdout] 938 | |                     Err(e) => {
[INFO] [stdout] 939 | |                         drop(caller_strand);
[INFO] [stdout] 940 | |                         return NoRemainingSubgoalsResult::RootSearchFail(e);
[INFO] [stdout] ...   |
[INFO] [stdout] 945 | |                     }
[INFO] [stdout] 946 | |                 }
[INFO] [stdout]     | |_________________^ cannot satisfy `_ -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chalk-engine` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f8316d644ac9190f9bc934273e3bded87bd2f8d8ac2f07336c181cca469ce376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8316d644ac9190f9bc934273e3bded87bd2f8d8ac2f07336c181cca469ce376", kill_on_drop: false }`
[INFO] [stdout] f8316d644ac9190f9bc934273e3bded87bd2f8d8ac2f07336c181cca469ce376