[INFO] fetching crate rtic 2.0.0-alpha.2...
[INFO] checking rtic-2.0.0-alpha.2 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate rtic 2.0.0-alpha.2 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate rtic 2.0.0-alpha.2 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate rtic 2.0.0-alpha.2
[INFO] finished tweaking crates.io crate rtic 2.0.0-alpha.2
[INFO] tweaked toml for crates.io crate rtic 2.0.0-alpha.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate rtic 2.0.0-alpha.2 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" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd24f580abe36164a0283fe49351567357959c8759f96b82ca34f8291964de03
[INFO] running `Command { std: "docker" "start" "-a" "fd24f580abe36164a0283fe49351567357959c8759f96b82ca34f8291964de03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd24f580abe36164a0283fe49351567357959c8759f96b82ca34f8291964de03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd24f580abe36164a0283fe49351567357959c8759f96b82ca34f8291964de03", kill_on_drop: false }`
[INFO] [stdout] fd24f580abe36164a0283fe49351567357959c8759f96b82ca34f8291964de03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1a18b2869343b645b26ccad3ced832a64e36fefa43ef775dc0f289432fe55a0
[INFO] running `Command { std: "docker" "start" "-a" "f1a18b2869343b645b26ccad3ced832a64e36fefa43ef775dc0f289432fe55a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]     Checking nb v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]    Compiling cortex-m-rt v0.6.15
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling atomic-polyfill v1.0.2
[INFO] [stderr]    Compiling cortex-m-semihosting v0.5.0
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]    Compiling heapless v0.7.16
[INFO] [stderr]    Compiling trybuild v1.0.80
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling lm3s6965 v0.1.3
[INFO] [stderr]     Checking critical-section v1.1.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling rtic v2.0.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_json v1.0.96
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking basic-toml v0.1.2
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking rtic-core v1.0.0
[INFO] [stderr]     Checking panic-semihosting v0.6.0
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling serde_derive v1.0.163
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.6.15
[INFO] [stderr]    Compiling rtic-macros v2.0.0-alpha.2
[INFO] [stdout] error: Cannot compile. No backend feature selected.
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rtic-macros-2.0.0-alpha.2/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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f1a18b2869343b645b26ccad3ced832a64e36fefa43ef775dc0f289432fe55a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1a18b2869343b645b26ccad3ced832a64e36fefa43ef775dc0f289432fe55a0", kill_on_drop: false }`
[INFO] [stdout] f1a18b2869343b645b26ccad3ced832a64e36fefa43ef775dc0f289432fe55a0
