[INFO] cloning repository https://github.com/birkenfeld/stm_ethernet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/birkenfeld/stm_ethernet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbirkenfeld%2Fstm_ethernet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbirkenfeld%2Fstm_ethernet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b008e16ffad920e34f6a718156af08765d6cb995
[INFO] checking birkenfeld/stm_ethernet against try#8b72f65b805cbe4c261de45030d663f524f27376 for pr-78991
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbirkenfeld%2Fstm_ethernet" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/birkenfeld/stm_ethernet on toolchain 8b72f65b805cbe4c261de45030d663f524f27376
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7/source/.cargo/config
[INFO] started tweaking git repo https://github.com/birkenfeld/stm_ethernet
[INFO] finished tweaking git repo https://github.com/birkenfeld/stm_ethernet
[INFO] tweaked toml for git repo https://github.com/birkenfeld/stm_ethernet written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/birkenfeld/stm_ethernet already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/birkenfeld/stm32-eth`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nb v1.0.0
[INFO] [stderr]   Downloaded cortex-m v0.6.3
[INFO] [stderr]   Downloaded smoltcp v0.6.0
[INFO] [stderr]   Downloaded nb v0.1.3
[INFO] [stderr]   Downloaded panic-itm v0.4.1
[INFO] [stderr]   Downloaded managed v0.7.2
[INFO] [stderr]   Downloaded stm32f4 v0.11.0
[INFO] [stderr]   Downloaded stm32f4xx-hal v0.8.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc209be9545e1fa5f19d2adde76bb0020266b172b2fa28ef909049077db39934
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bc209be9545e1fa5f19d2adde76bb0020266b172b2fa28ef909049077db39934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc209be9545e1fa5f19d2adde76bb0020266b172b2fa28ef909049077db39934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc209be9545e1fa5f19d2adde76bb0020266b172b2fa28ef909049077db39934", kill_on_drop: false }`
[INFO] [stdout] bc209be9545e1fa5f19d2adde76bb0020266b172b2fa28ef909049077db39934
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 83bbeba0467ca8e231e169bd264b2e59a474acc60a710185b8259a20561a58d5
[INFO] running `Command { std: "docker" "start" "-a" "83bbeba0467ca8e231e169bd264b2e59a474acc60a710185b8259a20561a58d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling cortex-m v0.6.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling stm32f4 v0.11.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking managed v0.7.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]     Checking smoltcp v0.6.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smoltcp-0.6.0/src/socket/mod.rs:132:34
[INFO] [stdout]     |
[INFO] [stdout] 132 |     pub(crate) fn meta(&self) -> &SocketMeta {
[INFO] [stdout]     |                   ----           ^^^^^^^^^^^ expected `&Meta`, found `()`
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 133 |         dispatch_socket!(self, |socket| &socket.meta)
[INFO] [stdout]     |                                                     - help: consider removing this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smoltcp-0.6.0/src/socket/mod.rs:136:42
[INFO] [stdout]     |
[INFO] [stdout] 136 |     pub(crate) fn meta_mut(&mut self) -> &mut SocketMeta {
[INFO] [stdout]     |                   --------               ^^^^^^^^^^^^^^^ expected `&mut Meta`, found `()`
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 137 |         dispatch_socket!(mut self, |socket| &mut socket.meta)
[INFO] [stdout]     |                                                             - help: consider removing this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smoltcp-0.6.0/src/socket/mod.rs:140:37
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub(crate) fn poll_at(&self) -> PollAt {
[INFO] [stdout]     |                   -------           ^^^^^^ expected enum `PollAt`, found `()`
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 141 |         dispatch_socket!(self, |socket| socket.poll_at())
[INFO] [stdout]     |                                                         - help: consider removing this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smoltcp`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "83bbeba0467ca8e231e169bd264b2e59a474acc60a710185b8259a20561a58d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83bbeba0467ca8e231e169bd264b2e59a474acc60a710185b8259a20561a58d5", kill_on_drop: false }`
[INFO] [stdout] 83bbeba0467ca8e231e169bd264b2e59a474acc60a710185b8259a20561a58d5