[INFO] cloning repository https://github.com/jcoglan/rust-os [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jcoglan/rust-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcoglan%2Frust-os", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcoglan%2Frust-os'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] b3296253e6ab7855c28d9b1a7313569bb3a6f4fb [INFO] checking jcoglan/rust-os against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcoglan%2Frust-os" "/workspace/builds/worker-14/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jcoglan/rust-os on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] removed /workspace/builds/worker-14/source/.cargo/config [INFO] started tweaking git repo https://github.com/jcoglan/rust-os [INFO] removed 0 missing tests [INFO] finished tweaking git repo https://github.com/jcoglan/rust-os [INFO] tweaked toml for git repo https://github.com/jcoglan/rust-os written to /workspace/builds/worker-14/source/Cargo.toml [INFO] crate git repo https://github.com/jcoglan/rust-os already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded conquer-once v0.2.1 [INFO] [stderr] Downloaded bootloader v0.9.5 [INFO] [stderr] Downloaded pc-keyboard v0.5.0 [INFO] [stderr] Downloaded x86_64 v0.11.1 [INFO] [stderr] Downloaded conquer-util v0.2.0 [INFO] [stderr] Downloaded linked_list_allocator v0.8.4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 61fa300a1f33365e503fdc74308925b1900d3c3fe732fe6124c87299fb44e4a1 [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" "61fa300a1f33365e503fdc74308925b1900d3c3fe732fe6124c87299fb44e4a1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "61fa300a1f33365e503fdc74308925b1900d3c3fe732fe6124c87299fb44e4a1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "61fa300a1f33365e503fdc74308925b1900d3c3fe732fe6124c87299fb44e4a1", kill_on_drop: false }` [INFO] [stdout] 61fa300a1f33365e503fdc74308925b1900d3c3fe732fe6124c87299fb44e4a1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f0af50622503b38cc7c1fece856f57cd4ce3c8d51b12beb4d23807bbc773857d [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" "f0af50622503b38cc7c1fece856f57cd4ce3c8d51b12beb4d23807bbc773857d", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.18 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling syn v1.0.34 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Compiling pin-project-internal v0.4.22 [INFO] [stderr] Checking scopeguard v1.1.0 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Compiling x86_64 v0.11.1 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Compiling bootloader v0.9.5 [INFO] [stderr] Checking bit_field v0.9.0 [INFO] [stderr] Checking futures-task v0.3.5 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Checking spin v0.5.2 [INFO] [stderr] Checking cpuio v0.3.0 [INFO] [stderr] Checking futures-core v0.3.5 [INFO] [stderr] Checking conquer-util v0.2.0 [INFO] [stderr] Checking pc-keyboard v0.5.0 [INFO] [stderr] Checking volatile v0.2.6 [INFO] [stderr] Checking lock_api v0.3.4 [INFO] [stderr] Checking pic8259_simple v0.2.0 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Checking conquer-once v0.2.1 [INFO] [stderr] Checking spinning_top v0.1.1 [INFO] [stderr] Checking linked_list_allocator v0.8.4 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [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" "f0af50622503b38cc7c1fece856f57cd4ce3c8d51b12beb4d23807bbc773857d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f0af50622503b38cc7c1fece856f57cd4ce3c8d51b12beb4d23807bbc773857d", kill_on_drop: false }` [INFO] [stdout] f0af50622503b38cc7c1fece856f57cd4ce3c8d51b12beb4d23807bbc773857d