[INFO] fetching crate rust_multicodec 0.2.0...
[INFO] testing rust_multicodec-0.2.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rust_multicodec 0.2.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate rust_multicodec 0.2.0
[INFO] finished tweaking crates.io crate rust_multicodec 0.2.0
[INFO] tweaked toml for crates.io crate rust_multicodec 0.2.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_multicodec 0.2.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding integer-encoding v1.1.7 (available: v4.1.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25ee3d06e72a7e730e4315f7642333c301f98858629f13156c43951eab23456f
[INFO] running `Command { std: "docker" "start" "-a" "25ee3d06e72a7e730e4315f7642333c301f98858629f13156c43951eab23456f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25ee3d06e72a7e730e4315f7642333c301f98858629f13156c43951eab23456f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25ee3d06e72a7e730e4315f7642333c301f98858629f13156c43951eab23456f", kill_on_drop: false }`
[INFO] [stdout] 25ee3d06e72a7e730e4315f7642333c301f98858629f13156c43951eab23456f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a54b03cb8d97b23eea853e2fd54b3f8bc2c341b6cf8b15d2363f725368c8996
[INFO] running `Command { std: "docker" "start" "-a" "1a54b03cb8d97b23eea853e2fd54b3f8bc2c341b6cf8b15d2363f725368c8996", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling hex-slice v0.1.4
[INFO] [stderr]    Compiling integer-encoding v1.1.7
[INFO] [stderr]    Compiling rust_multicodec v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::str;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no associated function or constant named `decode_var_vec` found for type `u64` in the current scope
[INFO] [stdout]   --> src/codec_prefix.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let decoded:(u64,usize)=u64::decode_var_vec(&Vec::from(data));
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^ associated function or constant not found in `u64`
[INFO] [stdout]    |
[INFO] [stdout] help: there is an associated function `decode_var` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 65 -     let decoded:(u64,usize)=u64::decode_var_vec(&Vec::from(data));
[INFO] [stdout] 65 +     let decoded:(u64,usize)=u64::decode_var(&Vec::from(data));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no associated function or constant named `decode_var_vec` found for type `u64` in the current scope
[INFO] [stdout]   --> src/codec_prefix.rs:97:34
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let decoded:(u64,usize)=u64::decode_var_vec(&Vec::from(data));
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^ associated function or constant not found in `u64`
[INFO] [stdout]    |
[INFO] [stdout] help: there is an associated function `decode_var` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 97 -     let decoded:(u64,usize)=u64::decode_var_vec(&Vec::from(data));
[INFO] [stdout] 97 +     let decoded:(u64,usize)=u64::decode_var(&Vec::from(data));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_multicodec` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1a54b03cb8d97b23eea853e2fd54b3f8bc2c341b6cf8b15d2363f725368c8996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a54b03cb8d97b23eea853e2fd54b3f8bc2c341b6cf8b15d2363f725368c8996", kill_on_drop: false }`
[INFO] [stdout] 1a54b03cb8d97b23eea853e2fd54b3f8bc2c341b6cf8b15d2363f725368c8996
