[INFO] fetching crate wasm-snip 0.4.0...
[INFO] checking wasm-snip-0.4.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate wasm-snip 0.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate wasm-snip 0.4.0 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 wasm-snip 0.4.0
[INFO] finished tweaking crates.io crate wasm-snip 0.4.0
[INFO] tweaked toml for crates.io crate wasm-snip 0.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate wasm-snip 0.4.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded wasmparser v0.37.2
[INFO] [stderr]   Downloaded proc-macro2 v1.0.3
[INFO] [stderr]   Downloaded predicates-core v1.0.0
[INFO] [stderr]   Downloaded memoffset v0.5.1
[INFO] [stderr]   Downloaded walrus-macro v0.12.0
[INFO] [stderr]   Downloaded assert_cmd v0.11.1
[INFO] [stderr]   Downloaded leb128 v0.2.4
[INFO] [stderr]   Downloaded escargot v0.4.0
[INFO] [stderr]   Downloaded cc v1.0.45
[INFO] [stderr]   Downloaded backtrace v0.3.37
[INFO] [stderr]   Downloaded serde v1.0.100
[INFO] [stderr]   Downloaded libc v0.2.62
[INFO] [stderr]   Downloaded backtrace-sys v0.1.31
[INFO] [stderr]   Downloaded rayon-core v1.6.0
[INFO] [stderr]   Downloaded rayon v1.2.0
[INFO] [stderr]   Downloaded syn v1.0.5
[INFO] [stderr]   Downloaded walrus v0.12.0
[INFO] [stderr]   Downloaded crossbeam-epoch v0.7.2
[INFO] [stderr]   Downloaded predicates v1.0.1
[INFO] [stderr]   Downloaded predicates-tree v1.0.0
[INFO] [stderr]   Downloaded crossbeam-deque v0.7.1
[INFO] [stderr]   Downloaded either v1.5.2
[INFO] [stderr]   Downloaded serde_derive v1.0.100
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 8d4461aa8fe571a85ec3488e80b059420eb1f6d5d645a088faaa8175026c5c50
[INFO] running `Command { std: "docker" "start" "-a" "8d4461aa8fe571a85ec3488e80b059420eb1f6d5d645a088faaa8175026c5c50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d4461aa8fe571a85ec3488e80b059420eb1f6d5d645a088faaa8175026c5c50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d4461aa8fe571a85ec3488e80b059420eb1f6d5d645a088faaa8175026c5c50", kill_on_drop: false }`
[INFO] [stdout] 8d4461aa8fe571a85ec3488e80b059420eb1f6d5d645a088faaa8175026c5c50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 6b27b2660f9d4894e769c7c037e386b91d9ee2df7f77f94e9199159c47953b20
[INFO] running `Command { std: "docker" "start" "-a" "6b27b2660f9d4894e769c7c037e386b91d9ee2df7f77f94e9199159c47953b20", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling serde v1.0.100
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking wasmparser v0.37.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking backtrace v0.3.37
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking id-arena v2.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.100
[INFO] [stderr]    Compiling walrus-macro v0.12.0
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking walrus v0.12.0
[INFO] [stderr]     Checking wasm-snip v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.38s
[INFO] running `Command { std: "docker" "inspect" "6b27b2660f9d4894e769c7c037e386b91d9ee2df7f77f94e9199159c47953b20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b27b2660f9d4894e769c7c037e386b91d9ee2df7f77f94e9199159c47953b20", kill_on_drop: false }`
[INFO] [stdout] 6b27b2660f9d4894e769c7c037e386b91d9ee2df7f77f94e9199159c47953b20
[INFO] checking wasm-snip-0.4.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate wasm-snip 0.4.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate wasm-snip 0.4.0 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 wasm-snip 0.4.0
[INFO] finished tweaking crates.io crate wasm-snip 0.4.0
[INFO] tweaked toml for crates.io crate wasm-snip 0.4.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate wasm-snip 0.4.0 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] e0f200923ea35d8ae0d24ff3ca3d39131b0fab93fd5b0b185b93852272a1e020
[INFO] running `Command { std: "docker" "start" "-a" "e0f200923ea35d8ae0d24ff3ca3d39131b0fab93fd5b0b185b93852272a1e020", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0f200923ea35d8ae0d24ff3ca3d39131b0fab93fd5b0b185b93852272a1e020", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0f200923ea35d8ae0d24ff3ca3d39131b0fab93fd5b0b185b93852272a1e020", kill_on_drop: false }`
[INFO] [stdout] e0f200923ea35d8ae0d24ff3ca3d39131b0fab93fd5b0b185b93852272a1e020
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 58c839c801d6d42ec48c8c7e639e66342b28e7757f133f73e35426c262f9ecc6
[INFO] running `Command { std: "docker" "start" "-a" "58c839c801d6d42ec48c8c7e639e66342b28e7757f133f73e35426c262f9ecc6", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling serde v1.0.100
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]     Checking wasmparser v0.37.2
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking backtrace v0.3.37
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking id-arena v2.2.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.3.1/src/exec.rs:838:13
[INFO] [stdout]     |
[INFO] [stdout] 838 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 839 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 840 | |                 self.cache.value(),
[INFO] [stdout] 841 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 852 | |                 Quit => return Some(Quit),
[INFO] [stdout] 853 | |             };
[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 `regex` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "58c839c801d6d42ec48c8c7e639e66342b28e7757f133f73e35426c262f9ecc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58c839c801d6d42ec48c8c7e639e66342b28e7757f133f73e35426c262f9ecc6", kill_on_drop: false }`
[INFO] [stdout] 58c839c801d6d42ec48c8c7e639e66342b28e7757f133f73e35426c262f9ecc6