[INFO] fetching crate does-it-json 0.0.4...
[INFO] checking does-it-json-0.0.4 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate does-it-json 0.0.4 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate does-it-json 0.0.4 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 does-it-json 0.0.4
[INFO] finished tweaking crates.io crate does-it-json 0.0.4
[INFO] tweaked toml for crates.io crate does-it-json 0.0.4 written to /workspace/builds/worker-2-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 37 packages
[INFO] [stderr]       Adding encode_unicode v0.3.6 (latest: v1.0.0)
[INFO] [stderr]       Adding regress v0.4.1 (latest: v0.9.1)
[INFO] [stderr]       Adding serde_derive_internals v0.26.0 (latest: v0.29.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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 newline-converter v0.3.0
[INFO] [stderr]   Downloaded expectorate v1.1.0
[INFO] [stderr]   Downloaded regress v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2bb1bb5c2f837406242de87fef62b3cdee51741041e31016a7c3a788c7928e1f
[INFO] running `Command { std: "docker" "start" "-a" "2bb1bb5c2f837406242de87fef62b3cdee51741041e31016a7c3a788c7928e1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2bb1bb5c2f837406242de87fef62b3cdee51741041e31016a7c3a788c7928e1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bb1bb5c2f837406242de87fef62b3cdee51741041e31016a7c3a788c7928e1f", kill_on_drop: false }`
[INFO] [stdout] 2bb1bb5c2f837406242de87fef62b3cdee51741041e31016a7c3a788c7928e1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 710520ab113d7076a72eec4bb43084ea25a7e1e3c2a89764c7b8f8bc1aa7b8a7
[INFO] running `Command { std: "docker" "start" "-a" "710520ab113d7076a72eec4bb43084ea25a7e1e3c2a89764c7b8f8bc1aa7b8a7", kill_on_drop: false }`
[INFO] [stderr]     Checking similar v2.5.0
[INFO] [stderr]     Checking newline-converter v0.3.0
[INFO] [stderr]     Checking regress v0.4.1
[INFO] [stderr]     Checking console v0.15.8
[INFO] [stderr]     Checking schemars v0.8.16
[INFO] [stderr]     Checking expectorate v1.1.0
[INFO] [stderr]     Checking does-it-json v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "710520ab113d7076a72eec4bb43084ea25a7e1e3c2a89764c7b8f8bc1aa7b8a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "710520ab113d7076a72eec4bb43084ea25a7e1e3c2a89764c7b8f8bc1aa7b8a7", kill_on_drop: false }`
[INFO] [stdout] 710520ab113d7076a72eec4bb43084ea25a7e1e3c2a89764c7b8f8bc1aa7b8a7
[INFO] checking does-it-json-0.0.4 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate does-it-json 0.0.4 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate does-it-json 0.0.4 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 does-it-json 0.0.4
[INFO] finished tweaking crates.io crate does-it-json 0.0.4
[INFO] tweaked toml for crates.io crate does-it-json 0.0.4 written to /workspace/builds/worker-2-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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 0a7093d67b0a74aeb9de6b7990ba23c20fb0e3c36e6a62a7fa967b3a0e2bb3bb
[INFO] running `Command { std: "docker" "start" "-a" "0a7093d67b0a74aeb9de6b7990ba23c20fb0e3c36e6a62a7fa967b3a0e2bb3bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a7093d67b0a74aeb9de6b7990ba23c20fb0e3c36e6a62a7fa967b3a0e2bb3bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a7093d67b0a74aeb9de6b7990ba23c20fb0e3c36e6a62a7fa967b3a0e2bb3bb", kill_on_drop: false }`
[INFO] [stdout] 0a7093d67b0a74aeb9de6b7990ba23c20fb0e3c36e6a62a7fa967b3a0e2bb3bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2862b63a2e7ca1b00489f7a1274c4a20a705055980dc67b8ea62f29740106a77
[INFO] running `Command { std: "docker" "start" "-a" "2862b63a2e7ca1b00489f7a1274c4a20a705055980dc67b8ea62f29740106a77", kill_on_drop: false }`
[INFO] [stderr]     Checking similar v2.5.0
[INFO] [stderr]    Compiling schemars v0.8.16
[INFO] [stderr]     Checking regress v0.4.1
[INFO] [stderr]     Checking newline-converter v0.3.0
[INFO] [stderr]     Checking console v0.15.8
[INFO] [stderr]    Compiling schemars_derive v0.8.16
[INFO] [stderr]     Checking expectorate v1.1.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regress-0.4.1/src/classicalbacktrack.rs:540:25
[INFO] [stdout]     |
[INFO] [stdout] 540 | /                         if $e {
[INFO] [stdout] 541 | |                             ip += 1;
[INFO] [stdout] 542 | |                             continue 'nextinsn;
[INFO] [stdout] 543 | |                         } else {
[INFO] [stdout] 544 | |                             break 'backtrack;
[INFO] [stdout] 545 | |                         }
[INFO] [stdout]     | |_________________________^ cannot infer type
[INFO] [stdout] ...
[INFO] [stdout] 555 |                           next_or_bt!(m);
[INFO] [stdout]     |                           -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `next_or_bt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regress-0.4.1/src/util.rs:19:13
[INFO] [stdout]     |
[INFO] [stdout] 19  |             unsafe { std::hint::unreachable_unchecked() }
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot satisfy `_ -> _`
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regress-0.4.1/src/indexing.rs:285:13
[INFO] [stdout]     |
[INFO] [stdout] 285 |             rs_unreachable!("Should have decoded a valid char from utf8 sequence");
[INFO] [stdout]     |             ---------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `rs_unreachable` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regress-0.4.1/src/util.rs:19:13
[INFO] [stdout]     |
[INFO] [stdout] 19  |             unsafe { std::hint::unreachable_unchecked() }
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot satisfy `_ -> _`
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regress-0.4.1/src/indexing.rs:342:13
[INFO] [stdout]     |
[INFO] [stdout] 342 |             rs_unreachable!("Should have decoded a valid char from utf8 sequence");
[INFO] [stdout]     |             ---------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `rs_unreachable` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0284.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regress` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2862b63a2e7ca1b00489f7a1274c4a20a705055980dc67b8ea62f29740106a77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2862b63a2e7ca1b00489f7a1274c4a20a705055980dc67b8ea62f29740106a77", kill_on_drop: false }`
[INFO] [stdout] 2862b63a2e7ca1b00489f7a1274c4a20a705055980dc67b8ea62f29740106a77