iced-rs/iced · error

Caches must not be empty

Error message

Caches must not be empty

What it means

Error "Caches must not be empty" thrown in iced-rs/iced.

Source

Thrown at highlighter/src/lib.rs:89

            self.current_line = snapshot * LINES_PER_SNAPSHOT;
        } else {
            self.caches.truncate(1);
            self.current_line = 0;
        }

        let (parser, stack) = self.caches.last().cloned().unwrap_or_else(|| {
            (
                parsing::ParseState::new(self.syntax),
                parsing::ScopeStack::new(),
            )
        });

        self.caches.push((parser, stack));
    }

    fn highlight_line(&mut self, line: &str) -> Self::Iterator<'_> {
        if self.current_line / LINES_PER_SNAPSHOT >= self.caches.len() {
            let (parser, stack) = self.caches.last().expect("Caches must not be empty");

            self.caches.push((parser.clone(), stack.clone()));
        }

        self.current_line += 1;

        let (parser, stack) = self.caches.last_mut().expect("Caches must not be empty");

        let ops = parser.parse_line(line, &SYNTAXES).unwrap_or_default();

        Box::new(scope_iterator(ops, line, stack, &self.highlighter))
    }

    fn current_line(&self) -> usize {
        self.current_line
    }
}

View on GitHub (pinned to 2cffa99b39)

When it happens

Trigger: Thrown at highlighter/src/lib.rs:89 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of iced-rs/iced@2cffa99b39 (2026-08-16). Data as JSON: /api/errors/456b1cb313a077a0. Report an issue: GitHub.