[INFO] cloning repository https://github.com/ainem-m/ahc015
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ainem-m/ahc015" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fainem-m%2Fahc015", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fainem-m%2Fahc015'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 127bf089520264768abab54732237dec4446abcf
[INFO] checking ainem-m/ahc015 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fainem-m%2Fahc015" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ainem-m/ahc015 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 git repo https://github.com/ainem-m/ahc015
[INFO] finished tweaking git repo https://github.com/ainem-m/ahc015
[INFO] tweaked toml for git repo https://github.com/ainem-m/ahc015 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ainem-m/ahc015 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 whiteread v0.5.0
[INFO] [stderr]   Downloaded text_io v0.1.8
[INFO] [stderr]   Downloaded smallvec v1.2.0
[INFO] [stderr]   Downloaded indexmap v1.3.2
[INFO] [stderr]   Downloaded bitset-fixed v0.1.0
[INFO] [stderr]   Downloaded proconio-derive v0.1.6
[INFO] [stderr]   Downloaded proconio v0.3.6
[INFO] [stderr]   Downloaded superslice v1.0.0
[INFO] [stderr]   Downloaded itertools-num v0.1.3
[INFO] [stderr]   Downloaded generic-array v0.13.2
[INFO] [stderr]   Downloaded num v0.2.1
[INFO] [stderr]   Downloaded num-derive v0.3.0
[INFO] [stderr]   Downloaded ascii v1.0.0
[INFO] [stderr]   Downloaded sized-chunks v0.5.3
[INFO] [stderr]   Downloaded permutohedron v0.2.4
[INFO] [stderr]   Downloaded ndarray v0.13.0
[INFO] [stderr]   Downloaded im-rc v14.3.0
[INFO] [stderr]   Downloaded nalgebra v0.20.0
[INFO] [stderr]   Downloaded syn v1.0.17
[INFO] [stderr]   Downloaded petgraph v0.5.0
[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] 1c153a61ab118a83387d7df00b0f51de8f8db09f64bccfee60b7049ec1312556
[INFO] running `Command { std: "docker" "start" "-a" "1c153a61ab118a83387d7df00b0f51de8f8db09f64bccfee60b7049ec1312556", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c153a61ab118a83387d7df00b0f51de8f8db09f64bccfee60b7049ec1312556", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c153a61ab118a83387d7df00b0f51de8f8db09f64bccfee60b7049ec1312556", kill_on_drop: false }`
[INFO] [stdout] 1c153a61ab118a83387d7df00b0f51de8f8db09f64bccfee60b7049ec1312556
[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] 192c3d456defd80a5abd95600105c57714d71a0a4d829c4847ab6e6e879517ad
[INFO] running `Command { std: "docker" "start" "-a" "192c3d456defd80a5abd95600105c57714d71a0a4d829c4847ab6e6e879517ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling im-rc v14.3.0
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking matrixmultiply v0.2.3
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]    Compiling proconio-derive v0.1.6
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking sized-chunks v0.5.3
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking petgraph v0.5.0
[INFO] [stderr]     Checking itertools-num v0.1.3
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking rand_hc v0.2.0
[INFO] [stderr]     Checking nalgebra v0.20.0
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking proconio v0.3.6
[INFO] [stderr]     Checking ascii v1.0.0
[INFO] [stderr]     Checking superslice v1.0.0
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking bitset-fixed v0.1.0
[INFO] [stderr]     Checking whiteread v0.5.0
[INFO] [stderr]     Checking permutohedron v0.2.4
[INFO] [stderr]     Checking text_io v0.1.8
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking ahc015 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]  --> src/bin/a.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |         n:usize,
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]  --> src/bin/a.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |         n:usize,
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.99s
[INFO] running `Command { std: "docker" "inspect" "192c3d456defd80a5abd95600105c57714d71a0a4d829c4847ab6e6e879517ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "192c3d456defd80a5abd95600105c57714d71a0a4d829c4847ab6e6e879517ad", kill_on_drop: false }`
[INFO] [stdout] 192c3d456defd80a5abd95600105c57714d71a0a4d829c4847ab6e6e879517ad
[INFO] checking ainem-m/ahc015 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fainem-m%2Fahc015" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ainem-m/ahc015 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 git repo https://github.com/ainem-m/ahc015
[INFO] finished tweaking git repo https://github.com/ainem-m/ahc015
[INFO] tweaked toml for git repo https://github.com/ainem-m/ahc015 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ainem-m/ahc015 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-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] ecd1b64fdeed8d1d0e0da3ec49e8249fceff710e80b8d3ac992021e563de2f98
[INFO] running `Command { std: "docker" "start" "-a" "ecd1b64fdeed8d1d0e0da3ec49e8249fceff710e80b8d3ac992021e563de2f98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecd1b64fdeed8d1d0e0da3ec49e8249fceff710e80b8d3ac992021e563de2f98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecd1b64fdeed8d1d0e0da3ec49e8249fceff710e80b8d3ac992021e563de2f98", kill_on_drop: false }`
[INFO] [stdout] ecd1b64fdeed8d1d0e0da3ec49e8249fceff710e80b8d3ac992021e563de2f98
[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] 217a9a4f44643878b84e19e8b73c34e16d29ed9a8677c4b7f97c34522051f3a7
[INFO] running `Command { std: "docker" "start" "-a" "217a9a4f44643878b84e19e8b73c34e16d29ed9a8677c4b7f97c34522051f3a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]     Checking matrixmultiply v0.2.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling im-rc v14.3.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking sized-chunks v0.5.3
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking petgraph v0.5.0
[INFO] [stderr]     Checking itertools-num v0.1.3
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking nalgebra v0.20.0
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking rand_hc v0.2.0
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking superslice v1.0.0
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking ascii v1.0.0
[INFO] [stderr]     Checking text_io v0.1.8
[INFO] [stderr]     Checking permutohedron v0.2.4
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking whiteread v0.5.0
[INFO] [stderr]     Checking bitset-fixed v0.1.0
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.3.6/src/exec.rs:836:13
[INFO] [stdout]     |
[INFO] [stdout] 836 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 837 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 838 | |                 self.cache.value(),
[INFO] [stdout] 839 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 850 | |                 Quit => return Some(Quit),
[INFO] [stdout] 851 | |             };
[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" "217a9a4f44643878b84e19e8b73c34e16d29ed9a8677c4b7f97c34522051f3a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "217a9a4f44643878b84e19e8b73c34e16d29ed9a8677c4b7f97c34522051f3a7", kill_on_drop: false }`
[INFO] [stdout] 217a9a4f44643878b84e19e8b73c34e16d29ed9a8677c4b7f97c34522051f3a7