[INFO] fetching crate mochi-rs 0.0.2...
[INFO] testing mochi-rs-0.0.2 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate mochi-rs 0.0.2 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate mochi-rs 0.0.2
[INFO] finished tweaking crates.io crate mochi-rs 0.0.2
[INFO] tweaked toml for crates.io crate mochi-rs 0.0.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mochi-rs 0.0.2 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 19 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dcf46b879c0a1d5de0b5e42d9cc596113ad556858fb77f05decb0d937682d2e6
[INFO] running `Command { std: "docker" "start" "-a" "dcf46b879c0a1d5de0b5e42d9cc596113ad556858fb77f05decb0d937682d2e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcf46b879c0a1d5de0b5e42d9cc596113ad556858fb77f05decb0d937682d2e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcf46b879c0a1d5de0b5e42d9cc596113ad556858fb77f05decb0d937682d2e6", kill_on_drop: false }`
[INFO] [stdout] dcf46b879c0a1d5de0b5e42d9cc596113ad556858fb77f05decb0d937682d2e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e399996854fa5bba77b55ff05b8e588f5c7b6e3c37a8081399ebf7e3e9440bba
[INFO] running `Command { std: "docker" "start" "-a" "e399996854fa5bba77b55ff05b8e588f5c7b6e3c37a8081399ebf7e3e9440bba", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling dlmalloc v0.2.11
[INFO] [stderr]    Compiling mochi-bind v0.0.1
[INFO] [stderr]    Compiling mochi-rs v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | / #![feature(
[INFO] [stdout] 3 | |     core_intrinsics,
[INFO] [stdout] 4 | |     alloc_error_handler,
[INFO] [stdout] 5 | |     fmt_internals,
[INFO] [stdout] 6 | |     panic_info_message
[INFO] [stdout] 7 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     core_intrinsics,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `fmt_internals` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fmt_internals,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `panic_info_message` has been stable since 1.81.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     panic_info_message
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:72:26
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let message = if let Some(args) = info.message() {
[INFO] [stdout]    |                          ^^^^^^^^^^   -------------- this expression has type `PanicMessage<'_>`
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          expected `PanicMessage<'_>`, found `Option<_>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `PanicMessage<'_>`
[INFO] [stdout]                 found enum `Option<_>`
[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 `mochi-rs` (lib) due to 2 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e399996854fa5bba77b55ff05b8e588f5c7b6e3c37a8081399ebf7e3e9440bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e399996854fa5bba77b55ff05b8e588f5c7b6e3c37a8081399ebf7e3e9440bba", kill_on_drop: false }`
[INFO] [stdout] e399996854fa5bba77b55ff05b8e588f5c7b6e3c37a8081399ebf7e3e9440bba