[INFO] fetching crate caso 0.2.2...
[INFO] checking caso-0.2.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate caso 0.2.2 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate caso 0.2.2 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 caso 0.2.2
[INFO] finished tweaking crates.io crate caso 0.2.2
[INFO] tweaked toml for crates.io crate caso 0.2.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate caso 0.2.2 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded piston_meta v2.0.1
[INFO] [stderr]   Downloaded monotonic_solver v0.5.0
[INFO] [stderr]   Downloaded range v1.0.0
[INFO] [stderr]   Downloaded read_token v1.0.0
[INFO] [stderr]   Downloaded avalog v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 449c9ff602ede6c583aa41b9a44ae16a8431f4b46c5f330150aa40f541ef24af
[INFO] running `Command { std: "docker" "start" "-a" "449c9ff602ede6c583aa41b9a44ae16a8431f4b46c5f330150aa40f541ef24af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "449c9ff602ede6c583aa41b9a44ae16a8431f4b46c5f330150aa40f541ef24af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "449c9ff602ede6c583aa41b9a44ae16a8431f4b46c5f330150aa40f541ef24af", kill_on_drop: false }`
[INFO] [stdout] 449c9ff602ede6c583aa41b9a44ae16a8431f4b46c5f330150aa40f541ef24af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f8c72f50a29527f40ff28a4c85ba28123c465253097e82bc68dff5086594b5b0
[INFO] running `Command { std: "docker" "start" "-a" "f8c72f50a29527f40ff28a4c85ba28123c465253097e82bc68dff5086594b5b0", kill_on_drop: false }`
[INFO] [stderr]     Checking range v1.0.0
[INFO] [stderr]     Checking monotonic_solver v0.5.0
[INFO] [stderr]     Checking read_token v1.0.0
[INFO] [stderr]     Checking piston_meta v2.0.1
[INFO] [stderr]     Checking avalog v0.7.0
[INFO] [stderr]     Checking caso v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `Command { std: "docker" "inspect" "f8c72f50a29527f40ff28a4c85ba28123c465253097e82bc68dff5086594b5b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8c72f50a29527f40ff28a4c85ba28123c465253097e82bc68dff5086594b5b0", kill_on_drop: false }`
[INFO] [stdout] f8c72f50a29527f40ff28a4c85ba28123c465253097e82bc68dff5086594b5b0
[INFO] checking caso-0.2.2 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate caso 0.2.2 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate caso 0.2.2 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 caso 0.2.2
[INFO] finished tweaking crates.io crate caso 0.2.2
[INFO] tweaked toml for crates.io crate caso 0.2.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate caso 0.2.2 already has a lockfile, it will not be regenerated
[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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 1b0667ed26cecb8427fc897f6a93a25bb16abc4d83f227393a7dbdf88c174f83
[INFO] running `Command { std: "docker" "start" "-a" "1b0667ed26cecb8427fc897f6a93a25bb16abc4d83f227393a7dbdf88c174f83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b0667ed26cecb8427fc897f6a93a25bb16abc4d83f227393a7dbdf88c174f83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b0667ed26cecb8427fc897f6a93a25bb16abc4d83f227393a7dbdf88c174f83", kill_on_drop: false }`
[INFO] [stdout] 1b0667ed26cecb8427fc897f6a93a25bb16abc4d83f227393a7dbdf88c174f83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 9fe6af8e9ccaad866763687622599a203ec1e0075aab67a9f6503212d6f98461
[INFO] running `Command { std: "docker" "start" "-a" "9fe6af8e9ccaad866763687622599a203ec1e0075aab67a9f6503212d6f98461", kill_on_drop: false }`
[INFO] [stderr]     Checking range v1.0.0
[INFO] [stderr]     Checking monotonic_solver v0.5.0
[INFO] [stderr]     Checking read_token v1.0.0
[INFO] [stderr]     Checking piston_meta v2.0.1
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/piston_meta-2.0.1/src/meta_rules/rule.rs:142:25
[INFO] [stdout]     |
[INFO] [stdout] 142 | /                         match found {
[INFO] [stdout] 143 | |                             None => { return; }
[INFO] [stdout] 144 | |                             Some(i) => {
[INFO] [stdout] 145 | |                                 p.index = Some(i);
[INFO] [stdout] 146 | |                                 return;
[INFO] [stdout] 147 | |                             }
[INFO] [stdout] 148 | |                         }
[INFO] [stdout]     | |_________________________^ cannot satisfy `_ -> _`
[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 E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `piston_meta` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9fe6af8e9ccaad866763687622599a203ec1e0075aab67a9f6503212d6f98461", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fe6af8e9ccaad866763687622599a203ec1e0075aab67a9f6503212d6f98461", kill_on_drop: false }`
[INFO] [stdout] 9fe6af8e9ccaad866763687622599a203ec1e0075aab67a9f6503212d6f98461