[INFO] cloning repository https://github.com/clearyf/muserial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/clearyf/muserial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclearyf%2Fmuserial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclearyf%2Fmuserial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86f7a6f6982293c323bac7d2184c420bcc051ad7
[INFO] checking clearyf/muserial against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclearyf%2Fmuserial" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/clearyf/muserial 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/clearyf/muserial
[INFO] finished tweaking git repo https://github.com/clearyf/muserial
[INFO] tweaked toml for git repo https://github.com/clearyf/muserial written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/clearyf/muserial 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 async-executor v1.6.0
[INFO] [stderr]   Downloaded async-process v2.0.1
[INFO] [stderr]   Downloaded async-signal v0.2.4
[INFO] [stderr]   Downloaded blocking v1.4.1
[INFO] [stderr]   Downloaded event-listener v5.0.0
[INFO] [stderr]   Downloaded smol v2.0.0
[INFO] [stderr]   Downloaded rustix v0.37.25
[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] 58f7f65b433d12fcf25e49f11e5efc6d812913a60bbf48fac72994b0737a5d1a
[INFO] running `Command { std: "docker" "start" "-a" "58f7f65b433d12fcf25e49f11e5efc6d812913a60bbf48fac72994b0737a5d1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58f7f65b433d12fcf25e49f11e5efc6d812913a60bbf48fac72994b0737a5d1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58f7f65b433d12fcf25e49f11e5efc6d812913a60bbf48fac72994b0737a5d1a", kill_on_drop: false }`
[INFO] [stdout] 58f7f65b433d12fcf25e49f11e5efc6d812913a60bbf48fac72994b0737a5d1a
[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] ace9dedb145c0b7bf82884bfb8e75858e921bc2ed12c9af7da1aab20769b1ec3
[INFO] running `Command { std: "docker" "start" "-a" "ace9dedb145c0b7bf82884bfb8e75858e921bc2ed12c9af7da1aab20769b1ec3", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking parking v2.2.0
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking waker-fn v1.1.1
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling rustix v0.38.20
[INFO] [stderr]     Checking linux-raw-sys v0.4.10
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]     Checking async-lock v2.8.0
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking tracing v0.1.39
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling rustix v0.37.25
[INFO] [stderr]     Checking concurrent-queue v2.3.0
[INFO] [stderr]     Checking futures-lite v2.2.0
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]     Checking event-listener v4.0.3
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]     Checking event-listener-strategy v0.4.0
[INFO] [stderr]     Checking atomic-waker v1.1.2
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking async-lock v3.3.0
[INFO] [stderr]     Checking async-task v4.4.1
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]     Checking async-channel v1.9.0
[INFO] [stderr]     Checking event-listener v5.0.0
[INFO] [stderr]     Checking async-executor v1.6.0
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking blocking v1.4.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking event-listener-strategy v0.5.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking async-channel v2.2.0
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]     Checking async-fs v2.1.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking polling v3.4.0
[INFO] [stderr]     Checking async-signal v0.2.4
[INFO] [stderr]     Checking async-io v2.3.1
[INFO] [stderr]     Checking async-net v2.0.0
[INFO] [stderr]     Checking async-process v2.0.1
[INFO] [stderr]     Checking smol v2.0.0
[INFO] [stderr]     Checking muserial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.55s
[INFO] running `Command { std: "docker" "inspect" "ace9dedb145c0b7bf82884bfb8e75858e921bc2ed12c9af7da1aab20769b1ec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ace9dedb145c0b7bf82884bfb8e75858e921bc2ed12c9af7da1aab20769b1ec3", kill_on_drop: false }`
[INFO] [stdout] ace9dedb145c0b7bf82884bfb8e75858e921bc2ed12c9af7da1aab20769b1ec3
[INFO] checking clearyf/muserial against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclearyf%2Fmuserial" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/clearyf/muserial 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/clearyf/muserial
[INFO] finished tweaking git repo https://github.com/clearyf/muserial
[INFO] tweaked toml for git repo https://github.com/clearyf/muserial written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/clearyf/muserial 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] 602d916742b5f38bd968775b2363237e760229f68f25cc55cf0c493d3c758f55
[INFO] running `Command { std: "docker" "start" "-a" "602d916742b5f38bd968775b2363237e760229f68f25cc55cf0c493d3c758f55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "602d916742b5f38bd968775b2363237e760229f68f25cc55cf0c493d3c758f55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "602d916742b5f38bd968775b2363237e760229f68f25cc55cf0c493d3c758f55", kill_on_drop: false }`
[INFO] [stdout] 602d916742b5f38bd968775b2363237e760229f68f25cc55cf0c493d3c758f55
[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] db5977af8ff89522e84d05f7949350c8a1b612e28de753348841051a90dcacb4
[INFO] running `Command { std: "docker" "start" "-a" "db5977af8ff89522e84d05f7949350c8a1b612e28de753348841051a90dcacb4", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking parking v2.2.0
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking waker-fn v1.1.1
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling rustix v0.38.20
[INFO] [stderr]     Checking slab v0.4.9
[INFO] [stderr]     Checking async-lock v2.8.0
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking linux-raw-sys v0.4.10
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]     Checking tracing v0.1.39
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-lite-1.13.0/src/future.rs:469:27
[INFO] [stdout]     |
[INFO] [stdout] 469 |             let t1 = res1.map_err(|_| unreachable!()).unwrap();
[INFO] [stdout]     |                           ^^^^^^^ cannot infer type of the type parameter `F` declared on the method `map_err`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 469 |             let t1 = res1.map_err::<F, _>(|_| unreachable!()).unwrap();
[INFO] [stdout]     |                                  ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking concurrent-queue v2.3.0
[INFO] [stderr]    Compiling rustix v0.37.25
[INFO] [stderr]     Checking futures-lite v2.2.0
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]     Checking event-listener v4.0.3
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking async-task v4.4.1
[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 `futures-lite` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "db5977af8ff89522e84d05f7949350c8a1b612e28de753348841051a90dcacb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db5977af8ff89522e84d05f7949350c8a1b612e28de753348841051a90dcacb4", kill_on_drop: false }`
[INFO] [stdout] db5977af8ff89522e84d05f7949350c8a1b612e28de753348841051a90dcacb4