[INFO] fetching crate unmp-center 0.1.2...
[INFO] testing unmp-center-0.1.2 against 1.91.0 for beta-1.92-2
[INFO] extracting crate unmp-center 0.1.2 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate unmp-center 0.1.2
[INFO] finished tweaking crates.io crate unmp-center 0.1.2
[INFO] tweaked toml for crates.io crate unmp-center 0.1.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate unmp-center 0.1.2 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]     Updating crates.io index
[INFO] [stderr]      Locking 55 packages to latest compatible versions
[INFO] [stderr]       Adding spin v0.9.8 (available: v0.10.0)
[INFO] [stderr]       Adding unmp v0.4.5 (available: v0.7.3)
[INFO] [stderr]       Adding unmp-protocol-etp v0.3.5 (available: v0.7.4)
[INFO] [stderr]       Adding unmp-protocol-raw v0.3.2 (available: v0.7.1)
[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 spin_loop v0.1.1
[INFO] [stderr]   Downloaded unmp-id v1.4.0
[INFO] [stderr]   Downloaded unmp-protocol-raw v0.3.2
[INFO] [stderr]   Downloaded ach-mpmc v0.2.0
[INFO] [stderr]   Downloaded unmp v0.4.5
[INFO] [stderr]   Downloaded atomic v0.5.3
[INFO] [stderr]   Downloaded ach-ring v0.1.9
[INFO] [stderr]   Downloaded ach-util v0.1.16
[INFO] [stderr]   Downloaded crc16 v0.4.0
[INFO] [stderr]   Downloaded vcell v0.1.3
[INFO] [stderr]   Downloaded interrupt v0.1.3
[INFO] [stderr]   Downloaded riscv-macros v0.3.0
[INFO] [stderr]   Downloaded riscv-pac v0.2.0
[INFO] [stderr]   Downloaded bare-metal v1.0.0
[INFO] [stderr]   Downloaded unmp-center-core v0.1.3
[INFO] [stderr]   Downloaded unmp-protocol-etp v0.3.5
[INFO] [stderr]   Downloaded embedded-hal v1.0.0
[INFO] [stderr]   Downloaded unmp-id v2.0.0
[INFO] [stderr]   Downloaded riscv v0.15.0
[INFO] [stderr]   Downloaded bitfield v0.13.2
[INFO] [stderr]   Downloaded cortex-m v0.7.7
[INFO] [stderr]   Downloaded volatile-register v0.2.2
[INFO] [stderr]   Downloaded msp430 v0.4.1
[INFO] [stderr]   Downloaded fixed-queue v0.3.11
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded xtensa-lx v0.13.0
[INFO] [stderr]   Downloaded task-stream v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] e7d6d30f1482da55239a4e3b12964778f7ae36cb63bf07d2ece94f4ab1f50f7a
[INFO] running `Command { std: "docker" "start" "-a" "e7d6d30f1482da55239a4e3b12964778f7ae36cb63bf07d2ece94f4ab1f50f7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7d6d30f1482da55239a4e3b12964778f7ae36cb63bf07d2ece94f4ab1f50f7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7d6d30f1482da55239a4e3b12964778f7ae36cb63bf07d2ece94f4ab1f50f7a", kill_on_drop: false }`
[INFO] [stdout] e7d6d30f1482da55239a4e3b12964778f7ae36cb63bf07d2ece94f4ab1f50f7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 4f9abf9d25b62e991892f0b3d92826f206c911a10b709571594922fa528a4a9c
[INFO] running `Command { std: "docker" "start" "-a" "4f9abf9d25b62e991892f0b3d92826f206c911a10b709571594922fa528a4a9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling atomic v0.5.3
[INFO] [stderr]    Compiling spin_loop v0.1.1
[INFO] [stderr]    Compiling crc16 v0.4.0
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling async-task v4.7.1
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling unmp-id v1.4.0
[INFO] [stderr]    Compiling fixed-queue v0.3.11
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling ach-util v0.1.16
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling md5 v0.7.0
[INFO] [stderr]    Compiling unmp-id v2.0.0
[INFO] [stderr]    Compiling ach-ring v0.1.9
[INFO] [stderr]    Compiling ach-mpmc v0.2.0
[INFO] [stderr]    Compiling unmp-center-core v0.1.3
[INFO] [stderr]    Compiling task-stream v0.3.7
[INFO] [stderr]    Compiling unmp v0.4.5
[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-0.4.5/src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(const_btree_new)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/unmp-0.4.5/src/net/history.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn add(&self, packet: &Packet) -> bool {
[INFO] [stdout]    |                                           ---- expected `bool` because of return type
[INFO] [stdout] 39 |         let new_log = Log::new(packet);
[INFO] [stdout] 40 |         self.inner.insert(new_log)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found `()`
[INFO] [stdout]    |
[INFO] [stdout] note: method `insert` modifies its receiver in-place
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/unmp-0.4.5/src/net/history.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |         self.inner.insert(new_log)
[INFO] [stdout]    |                    ^^^^^^ this call modifies its receiver in-place
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unmp` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4f9abf9d25b62e991892f0b3d92826f206c911a10b709571594922fa528a4a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f9abf9d25b62e991892f0b3d92826f206c911a10b709571594922fa528a4a9c", kill_on_drop: false }`
[INFO] [stdout] 4f9abf9d25b62e991892f0b3d92826f206c911a10b709571594922fa528a4a9c
