[INFO] fetching crate vngineer-simpleton 1.0.3...
[INFO] checking vngineer-simpleton-1.0.3 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate vngineer-simpleton 1.0.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate vngineer-simpleton 1.0.3 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 vngineer-simpleton 1.0.3
[INFO] finished tweaking crates.io crate vngineer-simpleton 1.0.3
[INFO] tweaked toml for crates.io crate vngineer-simpleton 1.0.3 written to /workspace/builds/worker-4-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 92 packages
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding hash32 v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding heapless v0.7.17 (latest: v0.8.0)
[INFO] [stderr]       Adding intuicio-backend-vm v0.13.1 (latest: v0.31.6)
[INFO] [stderr]       Adding intuicio-core v0.13.1 (latest: v0.31.6)
[INFO] [stderr]       Adding intuicio-data v0.13.1 (latest: v0.31.6)
[INFO] [stderr]       Adding intuicio-derive v0.13.1 (latest: v0.31.6)
[INFO] [stderr]       Adding intuicio-essentials v0.13.1 (latest: v0.31.6)
[INFO] [stderr]       Adding intuicio-frontend-simpleton v0.13.1 (latest: v0.31.6)
[INFO] [stderr]       Adding intuicio-nodes v0.13.1 (latest: v0.31.6)
[INFO] [stderr]       Adding intuicio-plugins v0.13.1 (latest: v0.31.6)
[INFO] [stderr]       Adding memoffset v0.8.0 (latest: v0.9.1)
[INFO] [stderr]       Adding rstar v0.10.0 (latest: v0.12.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding toml v0.7.8 (latest: v0.8.12)
[INFO] [stderr]       Adding toml_edit v0.19.15 (latest: v0.22.9)
[INFO] [stderr]       Adding uuid v0.8.2 (latest: v1.8.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding winnow v0.5.40 (latest: v0.6.5)
[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 intuicio-essentials v0.13.1
[INFO] [stderr]   Downloaded intuicio-plugins v0.13.1
[INFO] [stderr]   Downloaded intuicio-derive v0.13.1
[INFO] [stderr]   Downloaded intuicio-data v0.13.1
[INFO] [stderr]   Downloaded intuicio-core v0.13.1
[INFO] [stderr]   Downloaded intuicio-frontend-simpleton v0.13.1
[INFO] [stderr]   Downloaded serde-intermediate-derive v1.6.0
[INFO] [stderr]   Downloaded intuicio-backend-vm v0.13.1
[INFO] [stderr]   Downloaded intuicio-nodes v0.13.1
[INFO] [stderr]   Downloaded serde-intermediate v1.6.0
[INFO] [stderr]   Downloaded vngineer-core v1.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] d8fec677874304992265a8966e90fa50d76e5aef4dcdf1ee531be7ee175857d3
[INFO] running `Command { std: "docker" "start" "-a" "d8fec677874304992265a8966e90fa50d76e5aef4dcdf1ee531be7ee175857d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8fec677874304992265a8966e90fa50d76e5aef4dcdf1ee531be7ee175857d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8fec677874304992265a8966e90fa50d76e5aef4dcdf1ee531be7ee175857d3", kill_on_drop: false }`
[INFO] [stdout] d8fec677874304992265a8966e90fa50d76e5aef4dcdf1ee531be7ee175857d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 82fc38de4b7469460f6e4971fe7342b2ffc0afc27710a5ac0d093b75b6bd501f
[INFO] running `Command { std: "docker" "start" "-a" "82fc38de4b7469460f6e4971fe7342b2ffc0afc27710a5ac0d093b75b6bd501f", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking ucd-trie v0.1.6
[INFO] [stderr]     Checking libloading v0.8.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling serde-intermediate-derive v1.6.0
[INFO] [stderr]    Compiling intuicio-derive v0.13.1
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]     Checking unicode_categories v0.1.1
[INFO] [stderr]     Checking winnow v0.5.40
[INFO] [stderr]    Compiling pest v2.7.9
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking snailquote v0.3.1
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]    Compiling pest_meta v2.7.9
[INFO] [stderr]     Checking rstar v0.10.0
[INFO] [stderr]    Compiling pest_generator v2.7.9
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]    Compiling pest_derive v2.7.9
[INFO] [stderr]     Checking toml_edit v0.19.15
[INFO] [stderr]     Checking typid v1.1.1
[INFO] [stderr]     Checking intuicio-data v0.13.1
[INFO] [stderr]     Checking intuicio-core v0.13.1
[INFO] [stderr]     Checking serde-intermediate v1.6.0
[INFO] [stderr]     Checking intuicio-plugins v0.13.1
[INFO] [stderr]     Checking intuicio-backend-vm v0.13.1
[INFO] [stderr]     Checking intuicio-essentials v0.13.1
[INFO] [stderr]     Checking vngineer-core v1.0.3
[INFO] [stderr]     Checking toml v0.7.8
[INFO] [stderr]     Checking intuicio-nodes v0.13.1
[INFO] [stderr]     Checking intuicio-frontend-simpleton v0.13.1
[INFO] [stderr]     Checking vngineer-simpleton v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.37s
[INFO] running `Command { std: "docker" "inspect" "82fc38de4b7469460f6e4971fe7342b2ffc0afc27710a5ac0d093b75b6bd501f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82fc38de4b7469460f6e4971fe7342b2ffc0afc27710a5ac0d093b75b6bd501f", kill_on_drop: false }`
[INFO] [stdout] 82fc38de4b7469460f6e4971fe7342b2ffc0afc27710a5ac0d093b75b6bd501f
[INFO] checking vngineer-simpleton-1.0.3 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate vngineer-simpleton 1.0.3 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate vngineer-simpleton 1.0.3 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 vngineer-simpleton 1.0.3
[INFO] finished tweaking crates.io crate vngineer-simpleton 1.0.3
[INFO] tweaked toml for crates.io crate vngineer-simpleton 1.0.3 written to /workspace/builds/worker-4-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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 4baa43d5190fd57d57b7eafff8e52221fbd6a99acadc217e50fb4de163ae3759
[INFO] running `Command { std: "docker" "start" "-a" "4baa43d5190fd57d57b7eafff8e52221fbd6a99acadc217e50fb4de163ae3759", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4baa43d5190fd57d57b7eafff8e52221fbd6a99acadc217e50fb4de163ae3759", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4baa43d5190fd57d57b7eafff8e52221fbd6a99acadc217e50fb4de163ae3759", kill_on_drop: false }`
[INFO] [stdout] 4baa43d5190fd57d57b7eafff8e52221fbd6a99acadc217e50fb4de163ae3759
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 2d3b9b10f8cad65a14d217f725ccae51ba0852fe672b7bb31c155c60fd827ac6
[INFO] running `Command { std: "docker" "start" "-a" "2d3b9b10f8cad65a14d217f725ccae51ba0852fe672b7bb31c155c60fd827ac6", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking ucd-trie v0.1.6
[INFO] [stderr]     Checking libloading v0.8.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling serde-intermediate-derive v1.6.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling intuicio-derive v0.13.1
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking winnow v0.5.40
[INFO] [stderr]     Checking unicode_categories v0.1.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]     Checking pest v2.7.9
[INFO] [stderr]     Checking snailquote v0.3.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/snailquote-0.3.1/src/lib.rs:253:17
[INFO] [stdout]     |
[INFO] [stdout] 253 | /                 match chars.next() {
[INFO] [stdout] 254 | |                     None => {
[INFO] [stdout] 255 | |                         return Err(UnescapeError::InvalidEscape {
[INFO] [stdout] 256 | |                             escape: format!("{}", c),
[INFO] [stdout] ...   |
[INFO] [stdout] 293 | |                     }
[INFO] [stdout] 294 | |                 };
[INFO] [stdout]     | |_________________^ cannot infer type
[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 `snailquote` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2d3b9b10f8cad65a14d217f725ccae51ba0852fe672b7bb31c155c60fd827ac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d3b9b10f8cad65a14d217f725ccae51ba0852fe672b7bb31c155c60fd827ac6", kill_on_drop: false }`
[INFO] [stdout] 2d3b9b10f8cad65a14d217f725ccae51ba0852fe672b7bb31c155c60fd827ac6