[INFO] fetching crate avr-progmem 0.1.2...
[INFO] checking avr-progmem-0.1.2 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate avr-progmem 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate avr-progmem 0.1.2 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate avr-progmem 0.1.2
[INFO] finished tweaking crates.io crate avr-progmem 0.1.2
[INFO] tweaked toml for crates.io crate avr-progmem 0.1.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate avr-progmem 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ecfd0ac47992c47258a13e469964af56aba6a1f8b363f3b36e1aa989e97818d
[INFO] running `Command { std: "docker" "start" "-a" "2ecfd0ac47992c47258a13e469964af56aba6a1f8b363f3b36e1aa989e97818d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ecfd0ac47992c47258a13e469964af56aba6a1f8b363f3b36e1aa989e97818d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ecfd0ac47992c47258a13e469964af56aba6a1f8b363f3b36e1aa989e97818d", kill_on_drop: false }`
[INFO] [stdout] 2ecfd0ac47992c47258a13e469964af56aba6a1f8b363f3b36e1aa989e97818d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca09740ec061ead469a0499a7551591a2203d20e2196c09b8430161a83c688da
[INFO] running `Command { std: "docker" "start" "-a" "ca09740ec061ead469a0499a7551591a2203d20e2196c09b8430161a83c688da", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]     Checking avr-progmem v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `size_bytes`
[INFO] [stdout]    --> src/lib.rs:658:6
[INFO] [stdout]     |
[INFO] [stdout] 658 |     let size_bytes = size_bytes as u8;
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_size_bytes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `min_const_generics` has been stable since 1.51.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:14:31
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![cfg_attr(not(doc), feature(min_const_generics))]
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling ufmt-macros v0.1.1
[INFO] [stderr]     Checking ufmt v0.1.0
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `arduino_uno`
[INFO] [stdout]   --> examples/printer/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use arduino_uno::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^ use of undeclared crate or module `arduino_uno`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> examples/uno-serial.rs:119:2
[INFO] [stdout]     |
[INFO] [stdout] 115 |       std::process::exit(0);
[INFO] [stdout]     |       --------------------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 119 | /     loop {
[INFO] [stdout] 120 | |         // Done, just do nothing
[INFO] [stdout] 121 | |     }
[INFO] [stdout]     | |_____^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `avr-progmem` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ca09740ec061ead469a0499a7551591a2203d20e2196c09b8430161a83c688da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca09740ec061ead469a0499a7551591a2203d20e2196c09b8430161a83c688da", kill_on_drop: false }`
[INFO] [stdout] ca09740ec061ead469a0499a7551591a2203d20e2196c09b8430161a83c688da