[INFO] fetching crate stakker_mio 0.2.5...
[INFO] checking stakker_mio-0.2.5 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate stakker_mio 0.2.5 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate stakker_mio 0.2.5 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 stakker_mio 0.2.5
[INFO] finished tweaking crates.io crate stakker_mio 0.2.5
[INFO] tweaked toml for crates.io crate stakker_mio 0.2.5 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate stakker_mio 0.2.5 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 qcell v0.5.3
[INFO] [stderr]   Downloaded stakker v0.2.5
[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] cdf47cbe05419dd3aa68bded3b83a0767434ad0b239366c3774f1a48b1019d3f
[INFO] running `Command { std: "docker" "start" "-a" "cdf47cbe05419dd3aa68bded3b83a0767434ad0b239366c3774f1a48b1019d3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cdf47cbe05419dd3aa68bded3b83a0767434ad0b239366c3774f1a48b1019d3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdf47cbe05419dd3aa68bded3b83a0767434ad0b239366c3774f1a48b1019d3f", kill_on_drop: false }`
[INFO] [stdout] cdf47cbe05419dd3aa68bded3b83a0767434ad0b239366c3774f1a48b1019d3f
[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] 887188afda586d3619bb48f3aa02cc0179541fcb0acbe264bc590f76ea21c546
[INFO] running `Command { std: "docker" "start" "-a" "887188afda586d3619bb48f3aa02cc0179541fcb0acbe264bc590f76ea21c546", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]     Checking qcell v0.5.3
[INFO] [stderr]     Checking stakker v0.2.5
[INFO] [stderr]     Checking mio v0.8.6
[INFO] [stderr]     Checking stakker_mio v0.2.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "887188afda586d3619bb48f3aa02cc0179541fcb0acbe264bc590f76ea21c546", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "887188afda586d3619bb48f3aa02cc0179541fcb0acbe264bc590f76ea21c546", kill_on_drop: false }`
[INFO] [stdout] 887188afda586d3619bb48f3aa02cc0179541fcb0acbe264bc590f76ea21c546
[INFO] checking stakker_mio-0.2.5 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate stakker_mio 0.2.5 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate stakker_mio 0.2.5 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 stakker_mio 0.2.5
[INFO] finished tweaking crates.io crate stakker_mio 0.2.5
[INFO] tweaked toml for crates.io crate stakker_mio 0.2.5 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate stakker_mio 0.2.5 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] b4d33007e5361c5ba358668400b73cc7234d958cef72c8ab959b409a7ddc22b8
[INFO] running `Command { std: "docker" "start" "-a" "b4d33007e5361c5ba358668400b73cc7234d958cef72c8ab959b409a7ddc22b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4d33007e5361c5ba358668400b73cc7234d958cef72c8ab959b409a7ddc22b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4d33007e5361c5ba358668400b73cc7234d958cef72c8ab959b409a7ddc22b8", kill_on_drop: false }`
[INFO] [stdout] b4d33007e5361c5ba358668400b73cc7234d958cef72c8ab959b409a7ddc22b8
[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] d275778d018fe045a0906430529d55fc1297eb7bc7395a1d9b67fdea6445c5ea
[INFO] running `Command { std: "docker" "start" "-a" "d275778d018fe045a0906430529d55fc1297eb7bc7395a1d9b67fdea6445c5ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]     Checking qcell v0.5.3
[INFO] [stderr]     Checking stakker v0.2.5
[INFO] [stderr]     Checking mio v0.8.6
[INFO] [stderr]     Checking stakker_mio v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/tcpstrbuf.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 | /                 match stream.write(&self.out[..]) {
[INFO] [stdout] 203 | |                     Err(ref e) if e.kind() == ErrorKind::Interrupted => continue,
[INFO] [stdout] 204 | |                     Err(ref e) if e.kind() == ErrorKind::WouldBlock => return Ok(()),
[INFO] [stdout] 205 | |                     Err(e) => return Err(e),
[INFO] [stdout] ...   |
[INFO] [stdout] 210 | |                     }
[INFO] [stdout] 211 | |                 };
[INFO] [stdout]     | |_________________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/tcpstrbuf.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 | /                 match stream.write(&self.out[..]) {
[INFO] [stdout] 203 | |                     Err(ref e) if e.kind() == ErrorKind::Interrupted => continue,
[INFO] [stdout] 204 | |                     Err(ref e) if e.kind() == ErrorKind::WouldBlock => return Ok(()),
[INFO] [stdout] 205 | |                     Err(e) => return Err(e),
[INFO] [stdout] ...   |
[INFO] [stdout] 210 | |                     }
[INFO] [stdout] 211 | |                 };
[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 `stakker_mio` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `stakker_mio` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d275778d018fe045a0906430529d55fc1297eb7bc7395a1d9b67fdea6445c5ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d275778d018fe045a0906430529d55fc1297eb7bc7395a1d9b67fdea6445c5ea", kill_on_drop: false }`
[INFO] [stdout] d275778d018fe045a0906430529d55fc1297eb7bc7395a1d9b67fdea6445c5ea