[INFO] fetching crate s3wf2 0.3.0...
[INFO] checking s3wf2-0.3.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate s3wf2 0.3.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate s3wf2 0.3.0 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 s3wf2 0.3.0
[INFO] finished tweaking crates.io crate s3wf2 0.3.0
[INFO] tweaked toml for crates.io crate s3wf2 0.3.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate s3wf2 0.3.0 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 log v0.4.10
[INFO] [stderr]   Downloaded syn v1.0.11
[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] e4553cb090ba5297accf3c5ca02de47bb5de82a478c29ad4e9b2b5f17acf89d3
[INFO] running `Command { std: "docker" "start" "-a" "e4553cb090ba5297accf3c5ca02de47bb5de82a478c29ad4e9b2b5f17acf89d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4553cb090ba5297accf3c5ca02de47bb5de82a478c29ad4e9b2b5f17acf89d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4553cb090ba5297accf3c5ca02de47bb5de82a478c29ad4e9b2b5f17acf89d3", kill_on_drop: false }`
[INFO] [stdout] e4553cb090ba5297accf3c5ca02de47bb5de82a478c29ad4e9b2b5f17acf89d3
[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] 0abc02235540ed62c2ad92eeeb6b58d5ed4b379d1cfa97f6084352d6dbee4286
[INFO] running `Command { std: "docker" "start" "-a" "0abc02235540ed62c2ad92eeeb6b58d5ed4b379d1cfa97f6084352d6dbee4286", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking s3wf2 v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.61s
[INFO] running `Command { std: "docker" "inspect" "0abc02235540ed62c2ad92eeeb6b58d5ed4b379d1cfa97f6084352d6dbee4286", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0abc02235540ed62c2ad92eeeb6b58d5ed4b379d1cfa97f6084352d6dbee4286", kill_on_drop: false }`
[INFO] [stdout] 0abc02235540ed62c2ad92eeeb6b58d5ed4b379d1cfa97f6084352d6dbee4286
[INFO] checking s3wf2-0.3.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate s3wf2 0.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate s3wf2 0.3.0 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 s3wf2 0.3.0
[INFO] finished tweaking crates.io crate s3wf2 0.3.0
[INFO] tweaked toml for crates.io crate s3wf2 0.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate s3wf2 0.3.0 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-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] 500e46d5e8fb625d81175fbc517d04dc6d9e5e04c354a5bea94a3311c2ef628c
[INFO] running `Command { std: "docker" "start" "-a" "500e46d5e8fb625d81175fbc517d04dc6d9e5e04c354a5bea94a3311c2ef628c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "500e46d5e8fb625d81175fbc517d04dc6d9e5e04c354a5bea94a3311c2ef628c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "500e46d5e8fb625d81175fbc517d04dc6d9e5e04c354a5bea94a3311c2ef628c", kill_on_drop: false }`
[INFO] [stdout] 500e46d5e8fb625d81175fbc517d04dc6d9e5e04c354a5bea94a3311c2ef628c
[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] f0043780e671fe671adef6d382173e8d7e63bbd390c57419389258e68fc9de18
[INFO] running `Command { std: "docker" "start" "-a" "f0043780e671fe671adef6d382173e8d7e63bbd390c57419389258e68fc9de18", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking regex v1.3.1
[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] running `Command { std: "docker" "inspect" "f0043780e671fe671adef6d382173e8d7e63bbd390c57419389258e68fc9de18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0043780e671fe671adef6d382173e8d7e63bbd390c57419389258e68fc9de18", kill_on_drop: false }`
[INFO] [stdout] f0043780e671fe671adef6d382173e8d7e63bbd390c57419389258e68fc9de18