[INFO] cloning repository https://github.com/swidoff/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/swidoff/rust-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswidoff%2Frust-os", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswidoff%2Frust-os'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 4617662046169e4a624fa53c47de883c5dd9a4fe [INFO] checking swidoff/rust-os against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswidoff%2Frust-os" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/swidoff/rust-os on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] removed /workspace/builds/worker-7/source/.cargo/config [INFO] started tweaking git repo https://github.com/swidoff/rust-os [INFO] removed 0 missing tests [INFO] finished tweaking git repo https://github.com/swidoff/rust-os [INFO] tweaked toml for git repo https://github.com/swidoff/rust-os written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/swidoff/rust-os already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0ded9dce513b40dd5bc25932a3270ed8b6efc358695df92b02a1059a9c560137 [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" "0ded9dce513b40dd5bc25932a3270ed8b6efc358695df92b02a1059a9c560137", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0ded9dce513b40dd5bc25932a3270ed8b6efc358695df92b02a1059a9c560137", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0ded9dce513b40dd5bc25932a3270ed8b6efc358695df92b02a1059a9c560137", kill_on_drop: false }` [INFO] [stdout] 0ded9dce513b40dd5bc25932a3270ed8b6efc358695df92b02a1059a9c560137 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 6b8b9f09ceeb855a442f6ba2f6e86df7e4e79d2b2adff9ce8431a30e4cea43d5 [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" "6b8b9f09ceeb855a442f6ba2f6e86df7e4e79d2b2adff9ce8431a30e4cea43d5", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling pin-project-internal v0.4.22 [INFO] [stderr] Compiling x86_64 v0.11.1 [INFO] [stderr] Compiling bootloader v0.9.4 [INFO] [stderr] Checking bit_field v0.9.0 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Checking cpuio v0.3.0 [INFO] [stderr] Checking futures-core v0.3.5 [INFO] [stderr] Checking futures-task v0.3.5 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Checking conquer-util v0.2.0 [INFO] [stderr] Checking spin v0.5.2 [INFO] [stderr] Checking volatile v0.2.6 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Checking lock_api v0.3.4 [INFO] [stderr] Checking pic8259_simple v0.2.0 [INFO] [stderr] Checking conquer-once v0.2.0 [INFO] [stderr] Checking maybe-uninit v2.0.0 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Compiling proc-macro2 v1.0.18 [INFO] [stderr] Checking spinning_top v0.1.0 [INFO] [stderr] Checking linked_list_allocator v0.8.4 [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] [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: build failed [INFO] running `Command { std: "docker" "inspect" "6b8b9f09ceeb855a442f6ba2f6e86df7e4e79d2b2adff9ce8431a30e4cea43d5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6b8b9f09ceeb855a442f6ba2f6e86df7e4e79d2b2adff9ce8431a30e4cea43d5", kill_on_drop: false }` [INFO] [stdout] 6b8b9f09ceeb855a442f6ba2f6e86df7e4e79d2b2adff9ce8431a30e4cea43d5