[INFO] fetching crate koto_json 0.12.0...
[INFO] checking koto_json-0.12.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate koto_json 0.12.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate koto_json 0.12.0 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 koto_json 0.12.0
[INFO] finished tweaking crates.io crate koto_json 0.12.0
[INFO] tweaked toml for crates.io crate koto_json 0.12.0 written to /workspace/builds/worker-5-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 59 packages
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[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 koto_lexer v0.12.0
[INFO] [stderr]   Downloaded koto_memory v0.12.0
[INFO] [stderr]   Downloaded koto_serialize v0.12.0
[INFO] [stderr]   Downloaded koto_parser v0.12.0
[INFO] [stderr]   Downloaded koto_bytecode v0.12.0
[INFO] [stderr]   Downloaded koto_runtime v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] bf5a5573879bec22532677fc9387e44fe704e1daa7a8b1934b8616c19ea4b814
[INFO] running `Command { std: "docker" "start" "-a" "bf5a5573879bec22532677fc9387e44fe704e1daa7a8b1934b8616c19ea4b814", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf5a5573879bec22532677fc9387e44fe704e1daa7a8b1934b8616c19ea4b814", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf5a5573879bec22532677fc9387e44fe704e1daa7a8b1934b8616c19ea4b814", kill_on_drop: false }`
[INFO] [stdout] bf5a5573879bec22532677fc9387e44fe704e1daa7a8b1934b8616c19ea4b814
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 187c996362df540dc5ce7739a8c0296ad1f8adef25b94d2cc187a61d4970ce62
[INFO] running `Command { std: "docker" "start" "-a" "187c996362df540dc5ce7739a8c0296ad1f8adef25b94d2cc187a61d4970ce62", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.2.4
[INFO] [stderr]     Checking koto_memory v0.12.0
[INFO] [stderr]     Checking dunce v1.0.4
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]     Checking koto_lexer v0.12.0
[INFO] [stderr]     Checking koto_parser v0.12.0
[INFO] [stderr]     Checking koto_bytecode v0.12.0
[INFO] [stderr]     Checking koto_runtime v0.12.0
[INFO] [stderr]     Checking koto_serialize v0.12.0
[INFO] [stderr]     Checking koto_json v0.12.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.00s
[INFO] running `Command { std: "docker" "inspect" "187c996362df540dc5ce7739a8c0296ad1f8adef25b94d2cc187a61d4970ce62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "187c996362df540dc5ce7739a8c0296ad1f8adef25b94d2cc187a61d4970ce62", kill_on_drop: false }`
[INFO] [stdout] 187c996362df540dc5ce7739a8c0296ad1f8adef25b94d2cc187a61d4970ce62
[INFO] checking koto_json-0.12.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate koto_json 0.12.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate koto_json 0.12.0 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 koto_json 0.12.0
[INFO] finished tweaking crates.io crate koto_json 0.12.0
[INFO] tweaked toml for crates.io crate koto_json 0.12.0 written to /workspace/builds/worker-5-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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 815ccd8355282e6f100f6ff5dea232c2c790e609ebbf52d58f025dfe37474ddf
[INFO] running `Command { std: "docker" "start" "-a" "815ccd8355282e6f100f6ff5dea232c2c790e609ebbf52d58f025dfe37474ddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "815ccd8355282e6f100f6ff5dea232c2c790e609ebbf52d58f025dfe37474ddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "815ccd8355282e6f100f6ff5dea232c2c790e609ebbf52d58f025dfe37474ddf", kill_on_drop: false }`
[INFO] [stdout] 815ccd8355282e6f100f6ff5dea232c2c790e609ebbf52d58f025dfe37474ddf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] f5adfc49045724f95a8fb6ba2b675d71292d6ac86f0037e95d633b4e29470b76
[INFO] running `Command { std: "docker" "start" "-a" "f5adfc49045724f95a8fb6ba2b675d71292d6ac86f0037e95d633b4e29470b76", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.2.4
[INFO] [stderr]     Checking koto_memory v0.12.0
[INFO] [stderr]     Checking dunce v1.0.4
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]     Checking unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking koto_lexer v0.12.0
[INFO] [stderr]     Checking koto_parser v0.12.0
[INFO] [stderr]     Checking koto_bytecode v0.12.0
[INFO] [stderr]     Checking koto_runtime v0.12.0
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/koto_runtime-0.12.0/src/vm.rs:2175:21
[INFO] [stdout]      |
[INFO] [stdout] 2175 |                     return runtime_error!("Unable to index {}", value.type_as_string());
[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 `koto_runtime` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f5adfc49045724f95a8fb6ba2b675d71292d6ac86f0037e95d633b4e29470b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5adfc49045724f95a8fb6ba2b675d71292d6ac86f0037e95d633b4e29470b76", kill_on_drop: false }`
[INFO] [stdout] f5adfc49045724f95a8fb6ba2b675d71292d6ac86f0037e95d633b4e29470b76