[INFO] cloning repository https://github.com/coffeecup-winner/rusted-drums
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/coffeecup-winner/rusted-drums" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoffeecup-winner%2Frusted-drums", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoffeecup-winner%2Frusted-drums'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fc3facf0a5711d738ca9b8cac2ebb201e092e2f6
[INFO] checking coffeecup-winner/rusted-drums against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoffeecup-winner%2Frusted-drums" "/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/coffeecup-winner/rusted-drums 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/coffeecup-winner/rusted-drums
[INFO] finished tweaking git repo https://github.com/coffeecup-winner/rusted-drums
[INFO] tweaked toml for git repo https://github.com/coffeecup-winner/rusted-drums written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/coffeecup-winner/rusted-drums 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pkg-config v0.3.19
[INFO] [stderr]   Downloaded mlua v0.5.3
[INFO] [stderr]   Downloaded midly v0.5.1
[INFO] [stderr]   Downloaded bstr v0.2.15
[INFO] [stderr]   Downloaded luajit-src v210.1.2+resty29a66f7
[INFO] [stderr]   Downloaded lua-src v542.0.0
[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] 11641c95d6c4f1db9c8b58f6920c4786181047f83f3368765ffc181b6e07d60a
[INFO] running `Command { std: "docker" "start" "-a" "11641c95d6c4f1db9c8b58f6920c4786181047f83f3368765ffc181b6e07d60a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11641c95d6c4f1db9c8b58f6920c4786181047f83f3368765ffc181b6e07d60a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11641c95d6c4f1db9c8b58f6920c4786181047f83f3368765ffc181b6e07d60a", kill_on_drop: false }`
[INFO] [stdout] 11641c95d6c4f1db9c8b58f6920c4786181047f83f3368765ffc181b6e07d60a
[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] e00fd04f975ef96dafc62c0149a17a2dfa68328c0affed3d225197d7b628a327
[INFO] running `Command { std: "docker" "start" "-a" "e00fd04f975ef96dafc62c0149a17a2dfa68328c0affed3d225197d7b628a327", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking midly v0.5.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling luajit-src v210.1.2+resty29a66f7
[INFO] [stderr]    Compiling lua-src v542.0.0
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]    Compiling mlua v0.5.3
[INFO] [stderr]     Checking rusted-drums v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.52s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: mlua v0.5.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "e00fd04f975ef96dafc62c0149a17a2dfa68328c0affed3d225197d7b628a327", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e00fd04f975ef96dafc62c0149a17a2dfa68328c0affed3d225197d7b628a327", kill_on_drop: false }`
[INFO] [stdout] e00fd04f975ef96dafc62c0149a17a2dfa68328c0affed3d225197d7b628a327
[INFO] checking coffeecup-winner/rusted-drums against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoffeecup-winner%2Frusted-drums" "/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/coffeecup-winner/rusted-drums 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/coffeecup-winner/rusted-drums
[INFO] finished tweaking git repo https://github.com/coffeecup-winner/rusted-drums
[INFO] tweaked toml for git repo https://github.com/coffeecup-winner/rusted-drums written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/coffeecup-winner/rusted-drums 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] dc61c5b2c0756998b83eca5d36aaae69c418b8a8383af097ecf6103c3f5596eb
[INFO] running `Command { std: "docker" "start" "-a" "dc61c5b2c0756998b83eca5d36aaae69c418b8a8383af097ecf6103c3f5596eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc61c5b2c0756998b83eca5d36aaae69c418b8a8383af097ecf6103c3f5596eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc61c5b2c0756998b83eca5d36aaae69c418b8a8383af097ecf6103c3f5596eb", kill_on_drop: false }`
[INFO] [stdout] dc61c5b2c0756998b83eca5d36aaae69c418b8a8383af097ecf6103c3f5596eb
[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] 91b889f14089e98bbce11d60b490f179cb39d3025710a2b9c2fb55eea147ad50
[INFO] running `Command { std: "docker" "start" "-a" "91b889f14089e98bbce11d60b490f179cb39d3025710a2b9c2fb55eea147ad50", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking midly v0.5.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/midly-0.5.1/src/smf.rs:739:25
[INFO] [stdout]     |
[INFO] [stdout] 739 |                         Err(err).context(err_malformed!("malformed event"))?;
[INFO] [stdout]     |                         ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 739 |                         Err::<T, error::Error>(err).context(err_malformed!("malformed event"))?;
[INFO] [stdout]     |                            +++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling luajit-src v210.1.2+resty29a66f7
[INFO] [stderr]    Compiling lua-src v542.0.0
[INFO] [stderr]     Checking bstr v0.2.15
[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 `midly` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "91b889f14089e98bbce11d60b490f179cb39d3025710a2b9c2fb55eea147ad50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91b889f14089e98bbce11d60b490f179cb39d3025710a2b9c2fb55eea147ad50", kill_on_drop: false }`
[INFO] [stdout] 91b889f14089e98bbce11d60b490f179cb39d3025710a2b9c2fb55eea147ad50