[INFO] fetching crate avr-progmem 0.1.5...
[INFO] testing avr-progmem-0.1.5 against 1.60.0 for beta-1.61-1
[INFO] extracting crate avr-progmem 0.1.5 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate avr-progmem 0.1.5 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-20/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate avr-progmem 0.1.5
[INFO] finished tweaking crates.io crate avr-progmem 0.1.5
[INFO] tweaked toml for crates.io crate avr-progmem 0.1.5 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate crates.io crate avr-progmem 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.17
[INFO] [stderr]   Downloaded syn v1.0.90
[INFO] [stderr]   Downloaded ufmt-macros v0.1.1
[INFO] [stderr]   Downloaded ufmt v0.1.0
[INFO] [stderr]   Downloaded panic-halt v0.2.0
[INFO] [stderr]   Downloaded ufmt-write v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc575637dcf0071b7282eaa9590970a974e09ec2678df1d6dff0eec2c9f0c596
[INFO] running `Command { std: "docker" "start" "-a" "fc575637dcf0071b7282eaa9590970a974e09ec2678df1d6dff0eec2c9f0c596", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc575637dcf0071b7282eaa9590970a974e09ec2678df1d6dff0eec2c9f0c596", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc575637dcf0071b7282eaa9590970a974e09ec2678df1d6dff0eec2c9f0c596", kill_on_drop: false }`
[INFO] [stdout] fc575637dcf0071b7282eaa9590970a974e09ec2678df1d6dff0eec2c9f0c596
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f6fbc31f22385bacc7634585e073ef65f90a0de9a7d7e0b1908f95612d9c1bc
[INFO] running `Command { std: "docker" "start" "-a" "0f6fbc31f22385bacc7634585e073ef65f90a0de9a7d7e0b1908f95612d9c1bc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling avr-progmem v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![cfg_attr(not(doc), feature(llvm_asm))]
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![cfg_attr(not(doc), feature(min_const_generics))]
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `min_const_generics` has been stable since 1.51.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `avr-progmem` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "0f6fbc31f22385bacc7634585e073ef65f90a0de9a7d7e0b1908f95612d9c1bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f6fbc31f22385bacc7634585e073ef65f90a0de9a7d7e0b1908f95612d9c1bc", kill_on_drop: false }`
[INFO] [stdout] 0f6fbc31f22385bacc7634585e073ef65f90a0de9a7d7e0b1908f95612d9c1bc