[INFO] fetching crate vapabi-cli 9.0.1...
[INFO] checking vapabi-cli-9.0.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate vapabi-cli 9.0.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate vapabi-cli 9.0.1 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 vapabi-cli 9.0.1
[INFO] finished tweaking crates.io crate vapabi-cli 9.0.1
[INFO] tweaked toml for crates.io crate vapabi-cli 9.0.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate vapabi-cli 9.0.1 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 tetsy-rlp v0.4.2
[INFO] [stderr]   Downloaded vapabi v9.0.1
[INFO] [stderr]   Downloaded vecarray v0.1.2
[INFO] [stderr]   Downloaded tetsy-scale-codec v1.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 17156ec28e60e7c0a801a62f4b09dce22cfe560a45c40096dc0661bb6ef1b079
[INFO] running `Command { std: "docker" "start" "-a" "17156ec28e60e7c0a801a62f4b09dce22cfe560a45c40096dc0661bb6ef1b079", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17156ec28e60e7c0a801a62f4b09dce22cfe560a45c40096dc0661bb6ef1b079", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17156ec28e60e7c0a801a62f4b09dce22cfe560a45c40096dc0661bb6ef1b079", kill_on_drop: false }`
[INFO] [stdout] 17156ec28e60e7c0a801a62f4b09dce22cfe560a45c40096dc0661bb6ef1b079
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] a353398967e296b764d3ffbffd8b1f7fa538f8e59f94ce4cb20634427c6df0c0
[INFO] running `Command { std: "docker" "start" "-a" "a353398967e296b764d3ffbffd8b1f7fa538f8e59f94ce4cb20634427c6df0c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking byte-slice-cast v0.3.5
[INFO] [stderr]     Checking tetsy-rlp v0.4.2
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]    Compiling serde_json v1.0.62
[INFO] [stderr]     Checking tetsy-impl-rlp v0.2.0
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking strsim v0.9.3
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking tiny-keccak v1.5.0
[INFO] [stderr]     Checking uint-crate v0.8.1
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking tetsy-fixed-hash v0.5.0
[INFO] [stderr]     Checking vecarray v0.1.2
[INFO] [stderr]     Checking tetsy-impl-serde v0.2.2
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking tetsy-scale-codec v1.0.3
[INFO] [stderr]     Checking vapbloom v0.8.0
[INFO] [stderr]     Checking tetsy-impl-codec v0.4.1
[INFO] [stderr]     Checking tetsy-primitive-types v0.6.0
[INFO] [stderr]     Checking vapory-types v0.8.0
[INFO] [stderr]     Checking vapabi v9.0.1
[INFO] [stderr]     Checking vapabi-cli v9.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `vapabi` is imported redundantly
[INFO] [stdout]  --> src/error.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | use {vapabi, docopt, hex};
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate vapabi;
[INFO] [stdout]   | -------------------- the item `vapabi` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `docopt` is imported redundantly
[INFO] [stdout]  --> src/error.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | use {vapabi, docopt, hex};
[INFO] [stdout]   |              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate docopt;
[INFO] [stdout]   | -------------------- the item `docopt` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hex` is imported redundantly
[INFO] [stdout]  --> src/error.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | use {vapabi, docopt, hex};
[INFO] [stdout]   |                      ^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate rustc_hex as hex;
[INFO] [stdout]   | ------------------------------ the item `hex` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `vapabi` is imported redundantly
[INFO] [stdout]  --> src/error.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | use {vapabi, docopt, hex};
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate vapabi;
[INFO] [stdout]   | -------------------- the item `vapabi` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `docopt` is imported redundantly
[INFO] [stdout]  --> src/error.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | use {vapabi, docopt, hex};
[INFO] [stdout]   |              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate docopt;
[INFO] [stdout]   | -------------------- the item `docopt` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hex` is imported redundantly
[INFO] [stdout]  --> src/error.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | use {vapabi, docopt, hex};
[INFO] [stdout]   |                      ^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate rustc_hex as hex;
[INFO] [stdout]   | ------------------------------ the item `hex` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.63s
[INFO] running `Command { std: "docker" "inspect" "a353398967e296b764d3ffbffd8b1f7fa538f8e59f94ce4cb20634427c6df0c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a353398967e296b764d3ffbffd8b1f7fa538f8e59f94ce4cb20634427c6df0c0", kill_on_drop: false }`
[INFO] [stdout] a353398967e296b764d3ffbffd8b1f7fa538f8e59f94ce4cb20634427c6df0c0
[INFO] checking vapabi-cli-9.0.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate vapabi-cli 9.0.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate vapabi-cli 9.0.1 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 vapabi-cli 9.0.1
[INFO] finished tweaking crates.io crate vapabi-cli 9.0.1
[INFO] tweaked toml for crates.io crate vapabi-cli 9.0.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate vapabi-cli 9.0.1 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 28bdfe2bd8d0beed01857db6ae5f2a992e6d1f17d3143cc61747e6aa3e83dccc
[INFO] running `Command { std: "docker" "start" "-a" "28bdfe2bd8d0beed01857db6ae5f2a992e6d1f17d3143cc61747e6aa3e83dccc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28bdfe2bd8d0beed01857db6ae5f2a992e6d1f17d3143cc61747e6aa3e83dccc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28bdfe2bd8d0beed01857db6ae5f2a992e6d1f17d3143cc61747e6aa3e83dccc", kill_on_drop: false }`
[INFO] [stdout] 28bdfe2bd8d0beed01857db6ae5f2a992e6d1f17d3143cc61747e6aa3e83dccc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e7febc8e8bae767f6d15d5dc16fd7a39998fdc73ded42cc666eff568cf111ff0
[INFO] running `Command { std: "docker" "start" "-a" "e7febc8e8bae767f6d15d5dc16fd7a39998fdc73ded42cc666eff568cf111ff0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking byte-slice-cast v0.3.5
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking tetsy-rlp v0.4.2
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]    Compiling serde_json v1.0.62
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking tetsy-impl-rlp v0.2.0
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking strsim v0.9.3
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking uint-crate v0.8.1
[INFO] [stderr]     Checking tiny-keccak v1.5.0
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tetsy-fixed-hash v0.5.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.4.3/src/exec.rs:841:13
[INFO] [stdout]     |
[INFO] [stdout] 841 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 842 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 843 | |                 self.cache.value(),
[INFO] [stdout] 844 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 855 | |                 Quit => return Some(Quit),
[INFO] [stdout] 856 | |             };
[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" "e7febc8e8bae767f6d15d5dc16fd7a39998fdc73ded42cc666eff568cf111ff0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7febc8e8bae767f6d15d5dc16fd7a39998fdc73ded42cc666eff568cf111ff0", kill_on_drop: false }`
[INFO] [stdout] e7febc8e8bae767f6d15d5dc16fd7a39998fdc73ded42cc666eff568cf111ff0