[INFO] fetching crate unmp-protocol-raw 0.7.1...
[INFO] testing unmp-protocol-raw-0.7.1 against 1.91.0 for beta-1.92-2
[INFO] extracting crate unmp-protocol-raw 0.7.1 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate unmp-protocol-raw 0.7.1
[INFO] finished tweaking crates.io crate unmp-protocol-raw 0.7.1
[INFO] tweaked toml for crates.io crate unmp-protocol-raw 0.7.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate unmp-protocol-raw 0.7.1 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 52 packages to latest compatible versions
[INFO] [stderr]       Adding spin v0.9.8 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unmp-link v0.7.0
[INFO] [stderr]   Downloaded fixed-queue v0.3.11
[INFO] [stderr]   Downloaded ach-mpmc v0.2.0
[INFO] [stderr]   Downloaded unmp-id v2.0.0
[INFO] [stderr]   Downloaded bare-metal v1.0.0
[INFO] [stderr]   Downloaded nb v1.1.0
[INFO] [stderr]   Downloaded futures-intrusive v0.4.2
[INFO] [stderr]   Downloaded cortex-m v0.7.7
[INFO] [stderr]   Downloaded task-stream v0.3.7
[INFO] [stderr]   Downloaded nb v0.1.3
[INFO] [stderr]   Downloaded embedded-hal v0.2.7
[INFO] [stderr]   Downloaded volatile-register v0.2.2
[INFO] [stderr]   Downloaded msp430 v0.4.1
[INFO] [stderr]   Downloaded riscv v0.15.0
[INFO] [stderr]   Downloaded xtensa-lx v0.13.0
[INFO] [stderr]   Downloaded interrupt v0.1.3
[INFO] [stderr]   Downloaded ach-ring v0.1.9
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded bitfield v0.13.2
[INFO] [stderr]   Downloaded vcell v0.1.3
[INFO] [stderr]   Downloaded riscv-macros v0.3.0
[INFO] [stderr]   Downloaded riscv-pac v0.2.0
[INFO] [stderr]   Downloaded spin_loop v0.1.1
[INFO] [stderr]   Downloaded ach-util v0.1.16
[INFO] [stderr]   Downloaded unmp v0.7.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de34ebb36b4d2df0c9bedd4223ce874823ddac8f3565906c58ca06a84e89071c
[INFO] running `Command { std: "docker" "start" "-a" "de34ebb36b4d2df0c9bedd4223ce874823ddac8f3565906c58ca06a84e89071c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de34ebb36b4d2df0c9bedd4223ce874823ddac8f3565906c58ca06a84e89071c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de34ebb36b4d2df0c9bedd4223ce874823ddac8f3565906c58ca06a84e89071c", kill_on_drop: false }`
[INFO] [stdout] de34ebb36b4d2df0c9bedd4223ce874823ddac8f3565906c58ca06a84e89071c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8619cc2d7d302a5a65629cbf55f92d887d1160c349f4ec6d0a1913d4a1212adf
[INFO] running `Command { std: "docker" "start" "-a" "8619cc2d7d302a5a65629cbf55f92d887d1160c349f4ec6d0a1913d4a1212adf", kill_on_drop: false }`
[INFO] [stderr]    Compiling atomic v0.5.3
[INFO] [stderr]    Compiling spin_loop v0.1.1
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling crc16 v0.4.0
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling fixed-queue v0.3.11
[INFO] [stderr]    Compiling async-task v4.7.1
[INFO] [stderr]    Compiling unmp-id v2.0.0
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling futures-intrusive v0.4.2
[INFO] [stderr]    Compiling ach-util v0.1.16
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling ach-ring v0.1.9
[INFO] [stderr]    Compiling ach-mpmc v0.2.0
[INFO] [stderr]    Compiling unmp-link v0.7.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/unmp-link-0.7.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(const_btree_new)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unmp-link` (lib) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8619cc2d7d302a5a65629cbf55f92d887d1160c349f4ec6d0a1913d4a1212adf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8619cc2d7d302a5a65629cbf55f92d887d1160c349f4ec6d0a1913d4a1212adf", kill_on_drop: false }`
[INFO] [stdout] 8619cc2d7d302a5a65629cbf55f92d887d1160c349f4ec6d0a1913d4a1212adf
