[INFO] fetching crate boxx 0.0.3-beta...
[INFO] testing boxx-0.0.3-beta against beta-2026-01-20 for beta-1.94-1
[INFO] extracting crate boxx 0.0.3-beta into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate boxx 0.0.3-beta
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate boxx 0.0.3-beta
[INFO] tweaked toml for crates.io crate boxx 0.0.3-beta written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate boxx 0.0.3-beta on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate boxx 0.0.3-beta 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" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 697772962b507da3cc4f719e6179cd780343e1e57de4d8b339c66e2ea35bf23c
[INFO] running `Command { std: "docker" "start" "-a" "697772962b507da3cc4f719e6179cd780343e1e57de4d8b339c66e2ea35bf23c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "697772962b507da3cc4f719e6179cd780343e1e57de4d8b339c66e2ea35bf23c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "697772962b507da3cc4f719e6179cd780343e1e57de4d8b339c66e2ea35bf23c", kill_on_drop: false }`
[INFO] [stdout] 697772962b507da3cc4f719e6179cd780343e1e57de4d8b339c66e2ea35bf23c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b17eaa733cbfc5730ae681ef7f0bb65b76590e427b3c4d12d4baed1c1630a52d
[INFO] running `Command { std: "docker" "start" "-a" "b17eaa733cbfc5730ae681ef7f0bb65b76590e427b3c4d12d4baed1c1630a52d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling utf8parse v0.1.1
[INFO] [stderr]    Compiling regex-syntax v0.6.16
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling vte v0.3.3
[INFO] [stderr]    Compiling strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling aho-corasick v0.7.9
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling termios v0.3.1
[INFO] [stderr]    Compiling clicolors-control v1.0.1
[INFO] [stderr]    Compiling term_size v0.3.1
[INFO] [stderr]    Compiling regex v1.3.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.11
[INFO] [stderr]    Compiling console v0.9.2
[INFO] [stderr]    Compiling thiserror v1.0.11
[INFO] [stderr]    Compiling boxx v0.0.3-beta (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/visual.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         source: std::io::Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/visual.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         source: std::str::Utf8Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.32s
[INFO] running `Command { std: "docker" "inspect" "b17eaa733cbfc5730ae681ef7f0bb65b76590e427b3c4d12d4baed1c1630a52d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b17eaa733cbfc5730ae681ef7f0bb65b76590e427b3c4d12d4baed1c1630a52d", kill_on_drop: false }`
[INFO] [stdout] b17eaa733cbfc5730ae681ef7f0bb65b76590e427b3c4d12d4baed1c1630a52d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8eed0319fdb5f96b93c3fb537ebf22022ccd4d081c42a338670cd924f4828d31
[INFO] running `Command { std: "docker" "start" "-a" "8eed0319fdb5f96b93c3fb537ebf22022ccd4d081c42a338670cd924f4828d31", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling smallvec v1.2.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling pulldown-cmark v0.4.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling semver-parser v0.9.0
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/visual.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         source: std::io::Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/visual.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         source: std::str::Utf8Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.12
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling version-sync v0.8.1
[INFO] [stderr]    Compiling boxx v0.0.3-beta (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/visual.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         source: std::io::Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/visual.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         source: std::str::Utf8Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 11.92s
[INFO] running `Command { std: "docker" "inspect" "8eed0319fdb5f96b93c3fb537ebf22022ccd4d081c42a338670cd924f4828d31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eed0319fdb5f96b93c3fb537ebf22022ccd4d081c42a338670cd924f4828d31", kill_on_drop: false }`
[INFO] [stdout] 8eed0319fdb5f96b93c3fb537ebf22022ccd4d081c42a338670cd924f4828d31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3620c7f5b924d087ed25555caa87cc6c9e155bf9ff4e150291ca977aa76ab3b9
[INFO] running `Command { std: "docker" "start" "-a" "3620c7f5b924d087ed25555caa87cc6c9e155bf9ff4e150291ca977aa76ab3b9", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `source` is never read
[INFO] [stderr]   --> src/visual.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         source: std::io::Error,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `source` is never read
[INFO] [stderr]   --> src/visual.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         source: std::str::Utf8Error,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `boxx` (lib) generated 2 warnings
[INFO] [stderr] warning: `boxx` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/boxx-de3a84d94b1fb863)
[INFO] [stderr]      Running tests/mod.rs (/opt/rustwide/target/debug/deps/mod-afbffe32fe718374)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_readme_deps ... ok
[INFO] [stdout] test test_html_root_url ... ok
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests boxx
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - Boxx::as_str (line 97) ... FAILED
[INFO] [stdout] test src/lib.rs - Boxx::default (line 36) ... ok
[INFO] [stdout] test src/lib.rs - Boxx::new (line 49) ... ok
[INFO] [stdout] test src/lib.rs - Boxx::display (line 84) ... ok
[INFO] [stdout] test src/lib.rs - Boxx::builder (line 63) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Boxx::as_str (line 97) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/lib.rs:101:53
[INFO] [stdout]     |
[INFO] [stdout]  98 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_97_0() {
[INFO] [stdout]     |                                      ---------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 101 | let result = Boxx::default().as_str("Hello, World!")?;
[INFO] [stdout]     |                                                     ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]     |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]     |
[INFO] [stdout]  98 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_97_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]  99 | use boxx::Boxx;
[INFO] [stdout] ...
[INFO] [stdout] 102 | println!("{}", result);
[INFO] [stdout] 103 +     Ok(())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Boxx::as_str (line 97)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 4 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.53s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "3620c7f5b924d087ed25555caa87cc6c9e155bf9ff4e150291ca977aa76ab3b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3620c7f5b924d087ed25555caa87cc6c9e155bf9ff4e150291ca977aa76ab3b9", kill_on_drop: false }`
[INFO] [stdout] 3620c7f5b924d087ed25555caa87cc6c9e155bf9ff4e150291ca977aa76ab3b9
