[INFO] fetching crate oak-mcp 0.0.11...
[INFO] checking oak-mcp-0.0.11 against 1.95.0 for pr-155915
[INFO] extracting crate oak-mcp 0.0.11 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate oak-mcp 0.0.11
[INFO] finished tweaking crates.io crate oak-mcp 0.0.11
[INFO] tweaked toml for crates.io crate oak-mcp 0.0.11 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate oak-mcp 0.0.11 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate oak-mcp 0.0.11 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66c3232ad81ae7174ea4141d27d5375d216605042fcc7d2865070d35a3fa467d
[INFO] running `Command { std: "docker" "start" "-a" "66c3232ad81ae7174ea4141d27d5375d216605042fcc7d2865070d35a3fa467d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66c3232ad81ae7174ea4141d27d5375d216605042fcc7d2865070d35a3fa467d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66c3232ad81ae7174ea4141d27d5375d216605042fcc7d2865070d35a3fa467d", kill_on_drop: false }`
[INFO] [stdout] 66c3232ad81ae7174ea4141d27d5375d216605042fcc7d2865070d35a3fa467d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c2d111fe9a321cd205dd9a57cd29767599feb8ab2099fb5dba4c0dfb44dbc65
[INFO] running `Command { std: "docker" "start" "-a" "6c2d111fe9a321cd205dd9a57cd29767599feb8ab2099fb5dba4c0dfb44dbc65", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling libc v0.2.182
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]     Checking stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling zerocopy v0.8.40
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking log v0.4.29
[INFO] [stderr]     Checking bitflags v2.11.0
[INFO] [stderr]     Checking memchr v2.8.0
[INFO] [stderr]     Checking tracing-core v0.1.36
[INFO] [stderr]     Checking futures-sink v0.3.32
[INFO] [stderr]     Checking futures-core v0.3.32
[INFO] [stderr]     Checking percent-encoding v2.3.2
[INFO] [stderr]     Checking slab v0.4.12
[INFO] [stderr]     Checking futures-io v0.3.32
[INFO] [stderr]     Checking futures-task v0.3.32
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking bytes v1.11.1
[INFO] [stderr]     Checking notify-types v2.1.0
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]     Checking form_urlencoded v1.2.2
[INFO] [stderr]     Checking futures-channel v0.3.32
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking thread_local v1.1.9
[INFO] [stderr]     Checking nu-ansi-term v0.50.3
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking mio v1.1.1
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking matchers v0.2.0
[INFO] [stderr]     Checking inotify v0.11.0
[INFO] [stderr]     Checking rand_core v0.9.5
[INFO] [stderr]     Checking dashmap v6.1.0
[INFO] [stderr]     Checking notify v8.2.0
[INFO] [stderr]     Checking serde_json v1.0.149
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.1
[INFO] [stderr]    Compiling zerovec-derive v0.11.2
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling tokio-macros v2.6.1
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking futures-util v0.3.32
[INFO] [stderr]     Checking tokio v1.50.0
[INFO] [stderr]     Checking zerofrom v0.1.6
[INFO] [stderr]     Checking yoke v0.8.1
[INFO] [stderr]     Checking zerotrie v0.2.3
[INFO] [stderr]     Checking twox-hash v2.1.2
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]     Checking tracing-subscriber v0.3.22
[INFO] [stderr]     Checking zerovec v0.11.5
[INFO] [stderr]     Checking tinystr v0.8.2
[INFO] [stderr]     Checking potential_utf v0.1.4
[INFO] [stderr]     Checking icu_collections v2.1.1
[INFO] [stderr]     Checking icu_locale_core v2.1.1
[INFO] [stderr]     Checking icu_provider v2.1.1
[INFO] [stderr]     Checking icu_normalizer v2.1.1
[INFO] [stderr]     Checking icu_properties v2.1.2
[INFO] [stderr]     Checking idna_adapter v1.2.1
[INFO] [stderr]     Checking idna v1.1.0
[INFO] [stderr]     Checking triomphe v0.1.15
[INFO] [stderr]     Checking url v2.5.8
[INFO] [stderr]     Checking futures-executor v0.3.32
[INFO] [stderr]     Checking futures v0.3.32
[INFO] [stderr]     Checking oak-core v0.0.11
[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/oak-core-0.0.11/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(allocator_api)] // Required for custom arena allocation and manual memory management
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `oak-core` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "6c2d111fe9a321cd205dd9a57cd29767599feb8ab2099fb5dba4c0dfb44dbc65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c2d111fe9a321cd205dd9a57cd29767599feb8ab2099fb5dba4c0dfb44dbc65", kill_on_drop: false }`
[INFO] [stdout] 6c2d111fe9a321cd205dd9a57cd29767599feb8ab2099fb5dba4c0dfb44dbc65