[INFO] fetching crate alloc-cortex-m 0.4.0... [INFO] checking alloc-cortex-m-0.4.0 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714 [INFO] extracting crate alloc-cortex-m 0.4.0 into /workspace/builds/worker-9/source [INFO] validating manifest of crates.io crate alloc-cortex-m 0.4.0 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking crates.io crate alloc-cortex-m 0.4.0 [INFO] finished tweaking crates.io crate alloc-cortex-m 0.4.0 [INFO] tweaked toml for crates.io crate alloc-cortex-m 0.4.0 written to /workspace/builds/worker-9/source/Cargo.toml [INFO] crate crates.io crate alloc-cortex-m 0.4.0 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded linked_list_allocator v0.8.4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] da8c4cfb48eab0d02d07769aab65913a81f52aff876ea45e6216268b1a9fedc2 [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" "da8c4cfb48eab0d02d07769aab65913a81f52aff876ea45e6216268b1a9fedc2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "da8c4cfb48eab0d02d07769aab65913a81f52aff876ea45e6216268b1a9fedc2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "da8c4cfb48eab0d02d07769aab65913a81f52aff876ea45e6216268b1a9fedc2", kill_on_drop: false }` [INFO] [stdout] da8c4cfb48eab0d02d07769aab65913a81f52aff876ea45e6216268b1a9fedc2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 01c626f605603ad75c19a31de2e6d9ce7ba844251b017c6f5c1c31006b14ac95 [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" "01c626f605603ad75c19a31de2e6d9ce7ba844251b017c6f5c1c31006b14ac95", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.12 [INFO] [stderr] Compiling syn v1.0.19 [INFO] [stderr] Compiling cortex-m-rt v0.6.12 [INFO] [stderr] Checking linked_list_allocator v0.8.4 [INFO] [stderr] Checking as-slice v0.1.3 [INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked_list_allocator-0.8.4/src/hole.rs:18:23 [INFO] [stdout] | [INFO] [stdout] 18 | next: None, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #57349 for more information [INFO] [stdout] = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0658`. [INFO] [stdout] [INFO] [stderr] error: could not compile `linked_list_allocator` [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" "01c626f605603ad75c19a31de2e6d9ce7ba844251b017c6f5c1c31006b14ac95", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "01c626f605603ad75c19a31de2e6d9ce7ba844251b017c6f5c1c31006b14ac95", kill_on_drop: false }` [INFO] [stdout] 01c626f605603ad75c19a31de2e6d9ce7ba844251b017c6f5c1c31006b14ac95