[INFO] fetching crate ruma-serde 0.6.1...
[INFO] testing ruma-serde-0.6.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate ruma-serde 0.6.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate ruma-serde 0.6.1
[INFO] finished tweaking crates.io crate ruma-serde 0.6.1
[INFO] tweaked toml for crates.io crate ruma-serde 0.6.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ruma-serde 0.6.1 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 27 packages to latest compatible versions
[INFO] [stderr]       Adding base64 v0.13.1 (available: v0.22.1)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] d519a1265df95399e404f67a84cd1b03ae839d1bf8bda819c85a3d1fd10143f6
[INFO] running `Command { std: "docker" "start" "-a" "d519a1265df95399e404f67a84cd1b03ae839d1bf8bda819c85a3d1fd10143f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d519a1265df95399e404f67a84cd1b03ae839d1bf8bda819c85a3d1fd10143f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d519a1265df95399e404f67a84cd1b03ae839d1bf8bda819c85a3d1fd10143f6", kill_on_drop: false }`
[INFO] [stdout] d519a1265df95399e404f67a84cd1b03ae839d1bf8bda819c85a3d1fd10143f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 7581ae8e71d96899edce110fbd7fbeed9137a77afcadd8f55addb6e6fab9f968
[INFO] running `Command { std: "docker" "start" "-a" "7581ae8e71d96899edce110fbd7fbeed9137a77afcadd8f55addb6e6fab9f968", kill_on_drop: false }`
[INFO] [stderr]    Compiling hashbrown v0.17.0
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling indexmap v2.14.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling ruma-serde-macros v0.6.1
[INFO] [stderr]    Compiling js_int v0.2.2
[INFO] [stderr]    Compiling ruma-serde v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.44s
[INFO] running `Command { std: "docker" "inspect" "7581ae8e71d96899edce110fbd7fbeed9137a77afcadd8f55addb6e6fab9f968", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7581ae8e71d96899edce110fbd7fbeed9137a77afcadd8f55addb6e6fab9f968", kill_on_drop: false }`
[INFO] [stdout] 7581ae8e71d96899edce110fbd7fbeed9137a77afcadd8f55addb6e6fab9f968
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d10452585b1100dde25ed02ea918eae998e5eab050e93bb957591f66e92b8d0
[INFO] running `Command { std: "docker" "start" "-a" "7d10452585b1100dde25ed02ea918eae998e5eab050e93bb957591f66e92b8d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling matches v0.1.10
[INFO] [stderr]    Compiling ruma-serde v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `ruma_identifiers`
[INFO] [stdout]   --> tests/empty_strings.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use ruma_identifiers::{user_id, UserId};
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `ruma_identifiers`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `ruma_identifiers`, use `cargo add ruma_identifiers` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruma-serde` (test "empty_strings") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: struct `Wrapper` is never constructed
[INFO] [stdout]    --> tests/url_deserialize.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 | struct Wrapper<T> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Struct` is never constructed
[INFO] [stdout]    --> tests/url_deserialize.rs:188:8
[INFO] [stdout]     |
[INFO] [stdout] 188 | struct Struct<'a> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ListStruct` is never constructed
[INFO] [stdout]    --> tests/url_deserialize.rs:199:8
[INFO] [stdout]     |
[INFO] [stdout] 199 | struct ListStruct {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7d10452585b1100dde25ed02ea918eae998e5eab050e93bb957591f66e92b8d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d10452585b1100dde25ed02ea918eae998e5eab050e93bb957591f66e92b8d0", kill_on_drop: false }`
[INFO] [stdout] 7d10452585b1100dde25ed02ea918eae998e5eab050e93bb957591f66e92b8d0
