Hmbown/CodeWhale · error

tag regex pattern is valid

Error message

tag regex pattern is valid

What it means

Panic compiling the generic HTML tag-stripping pattern `<[^>]+>` in `TAG_RE.get_or_init`. This is the simplest of the scrape literals; the expect can only fire if the literal was edited into something the regex crate rejects (a stray `*`/`+` with nothing to repeat, or an unbalanced bracket class).

Source

Thrown at crates/tui/src/tools/web/scrape.rs:48

fn get_title_re() -> &'static Regex {
    TITLE_RE.get_or_init(|| {
        Regex::new(r#"<a[^>]*class=\"result__a\"[^>]*href=\"([^\"]+)\"[^>]*>(.*?)</a>"#)
            .expect("title regex pattern is valid")
    })
}

fn get_snippet_re() -> &'static Regex {
    SNIPPET_RE.get_or_init(|| {
        Regex::new(
            r#"<a[^>]*class=\"result__snippet\"[^>]*>(.*?)</a>|<div[^>]*class=\"result__snippet\"[^>]*>(.*?)</div>"#,
        )
        .expect("snippet regex pattern is valid")
    })
}

fn get_tag_re() -> &'static Regex {
    TAG_RE.get_or_init(|| Regex::new(r"<[^>]+>").expect("tag regex pattern is valid"))
}

fn get_bing_result_re() -> &'static Regex {
    BING_RESULT_RE.get_or_init(|| {
        Regex::new(r#"(?is)<li[^>]*class=\"[^\"]*\bb_algo\b[^\"]*\"[^>]*>(.*?)</li>"#)
            .expect("bing result regex pattern is valid")
    })
}

fn get_bing_title_re() -> &'static Regex {
    BING_TITLE_RE.get_or_init(|| {
        Regex::new(r#"(?is)<h2[^>]*>.*?<a[^>]*href=\"([^\"]+)\"[^>]*>(.*?)</a>"#)
            .expect("bing title regex pattern is valid")
    })
}

fn get_bing_snippet_re() -> &'static Regex {
    BING_SNIPPET_RE.get_or_init(|| {

View on GitHub (pinned to 0c42157ee5)

Solutions

1. Restore or fix the literal — the regex crate's error message in the panic payload names the exact offset.
2. Cover the getter in the shared pattern-compile unit test.
3. Re-run the scrape tests after the edit.

Example fix

// before
Regex::new(r"<[^>]+>").expect("tag regex pattern is valid")

// after: assert the edited variant still strips a sample tag
#[test]
fn tag_stripper_still_works() {
    assert_eq!(get_tag_re().replace_all("a<b>c</b>d", ""), "acd");
}

#[test]
fn tag_pattern_still_strips() {
    assert_eq!(get_tag_re().replace_all("a<b>c</b>d", ""), "acd");
}

let text = std::panic::catch_unwind(|| strip_tags(&html))
    .unwrap_or_else(|_| html.to_string());

When it happens

Trigger: An edit to the tag-stripping literal that breaks regex syntax; the first text normalization over scraped HTML after that build panics inside `get_tag_re`.

Common situations: Trying to also strip self-closing or malformed tags (e.g. adding `/?` incorrectly or a broken character class) without re-running tests.

Related errors

• title regex pattern is valid
• snippet regex pattern is valid
• bing result regex pattern is valid
• bing title regex pattern is valid
• bing snippet regex pattern is valid

AI-assisted analysis of Hmbown/CodeWhale@0c42157ee5 (2026-08-20). Data as JSON: /api/errors/a24b049c792090bd. Report an issue: GitHub.