[INFO] fetching crate rtic 2.0.1...
[INFO] testing rtic-2.0.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate rtic 2.0.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate rtic 2.0.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate rtic 2.0.1
[INFO] finished tweaking crates.io crate rtic 2.0.1
[INFO] tweaked toml for crates.io crate rtic 2.0.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate rtic 2.0.1 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rtic-common v1.0.0
[INFO] [stderr]   Downloaded rtic-core v1.0.0
[INFO] [stderr]   Downloaded lm3s6965 v0.2.0
[INFO] [stderr]   Downloaded trybuild v1.0.82
[INFO] [stderr]   Downloaded basic-toml v0.1.4
[INFO] [stderr]   Downloaded cortex-m-semihosting v0.5.0
[INFO] [stderr]   Downloaded rtic-macros v2.0.1
[INFO] [stderr]   Downloaded rtic-monotonics v1.0.0
[INFO] [stderr]   Downloaded rtic-time v1.0.0
[INFO] [stderr]   Downloaded panic-semihosting v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 749f712e40109a1bed50f4eba9df664be3c9f43e9885b23238e09b02216f3d8d
[INFO] running `Command { std: "docker" "start" "-a" "749f712e40109a1bed50f4eba9df664be3c9f43e9885b23238e09b02216f3d8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "749f712e40109a1bed50f4eba9df664be3c9f43e9885b23238e09b02216f3d8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "749f712e40109a1bed50f4eba9df664be3c9f43e9885b23238e09b02216f3d8d", kill_on_drop: false }`
[INFO] [stdout] 749f712e40109a1bed50f4eba9df664be3c9f43e9885b23238e09b02216f3d8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b597b378167969a0aa9d0c359ecde2006f16d48d5bc1347a5e4ede832b3329d1
[INFO] running `Command { std: "docker" "start" "-a" "b597b378167969a0aa9d0c359ecde2006f16d48d5bc1347a5e4ede832b3329d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling hashbrown v0.14.0
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling atomic-polyfill v1.0.3
[INFO] [stderr]    Compiling critical-section v1.1.1
[INFO] [stderr]    Compiling rtic v2.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling bare-metal v1.0.0
[INFO] [stderr]    Compiling rtic-core v1.0.0
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling indexmap v2.0.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling rtic-macros v2.0.1
[INFO] [stdout] error: Cannot compile. No backend feature selected.
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rtic-macros-2.0.1/src/lib.rs:112:1
[INFO] [stdout]     |
[INFO] [stdout] 112 | compile_error!("Cannot compile. No backend feature selected.");
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rtic-macros` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b597b378167969a0aa9d0c359ecde2006f16d48d5bc1347a5e4ede832b3329d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b597b378167969a0aa9d0c359ecde2006f16d48d5bc1347a5e4ede832b3329d1", kill_on_drop: false }`
[INFO] [stdout] b597b378167969a0aa9d0c359ecde2006f16d48d5bc1347a5e4ede832b3329d1
