zed-industries/zed · error

{err}

Error message

{err}

What it means

Pass-through of the underlying platform text system error in TextSystem::font_id's helper clone_font_id_result: resolving the FontId for a requested Font failed (unknown family, unregistered font, or style lookup failure).

Source

Thrown at crates/gpui/src/text_system.rs:107

    /// Includes fonts registered with [`Self::add_fonts`].
    pub fn all_font_names(&self) -> Vec<String> {
        let mut names = self.platform_text_system.all_font_names();
        names.sort_unstable();
        names.dedup();
        names
    }

    /// Add a font's data to the text system.
    pub fn add_fonts(&self, fonts: Vec<Cow<'static, [u8]>>) -> Result<()> {
        self.platform_text_system.add_fonts(fonts)
    }

    /// Get the FontId for the configure font family and style.
    fn font_id(&self, font: &Font) -> Result<FontId> {
        fn clone_font_id_result(font_id: &Result<FontId>) -> Result<FontId> {
            match font_id {
                Ok(font_id) => Ok(*font_id),
                Err(err) => Err(anyhow!("{err}")),
            }
        }

        let font_id = self
            .font_ids_by_font
            .read()
            .get(font)
            .map(clone_font_id_result);
        if let Some(font_id) = font_id {
            font_id
        } else {
            let font_id = self.platform_text_system.font_id(font);
            self.font_ids_by_font
                .write()
                .insert(font.clone(), clone_font_id_result(&font_id));
            font_id
        }
    }

View on GitHub (pinned to 9d272b0363)

Solutions

1. Check that required fonts are registered via add_fonts before text layout
2. Verify the font family/style requested actually exists on the system
3. Inspect the embedded `err` (platform text system error) for the concrete cause
4. Fall back to a default font family if the requested one is unavailable

When it happens

Trigger: Thrown at crates/gpui/src/text_system.rs:111 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@9d272b0363 (2026-08-20). Data as JSON: /api/errors/d0ce2c0e79ff085c. Report an issue: GitHub.