DioxusLabs/dioxus · error

op skip exceeds packed op capacity

Error message

op skip exceeds packed op capacity

What it means

TemplateOp packs an enter op's child-skip count into a u16 alongside opcode bits, capping it at MAX_CAP (16383). A template element with more skipped children than fits overflows the packed representation, so this guard fires at compile time when the RSX template is lowered.

Source

Thrown at packages/core-template/src/op.rs:18

/// One operation in a flat static template tape.
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[repr(transparent)]
#[cfg_attr(feature = "serialize", derive(serde::Serialize, serde::Deserialize))]
pub(crate) struct TemplateOp(u16);

impl TemplateOp {
    const ENTER_MAX_CODE: u16 = 0x7fff;
    const ATTR_CODE: u16 = 0x8000;
    const ATTR_CUSTOM_NS_CODE: u16 = 0x8001;
    const TEXT_CODE: u16 = 0x8002;
    const STATIC_BASE: u16 = 0x8003;
    pub(crate) const MAX_CAP: usize = 16_383;

    /// Create a packed enter op.
    pub(crate) const fn enter(skip: u16, namespace: bool) -> Self {
        if skip as usize > Self::MAX_CAP {
            panic!("op skip exceeds packed op capacity");
        }
        Self((skip << 1) | namespace as u16)
    }

    /// Create a packed static attribute op.
    pub(crate) const fn attr(namespace: bool) -> Self {
        if namespace {
            Self(Self::ATTR_CUSTOM_NS_CODE)
        } else {
            Self(Self::ATTR_CODE)
        }
    }

    /// Create a packed text marker op.
    pub(crate) const fn text() -> Self {
        Self(Self::TEXT_CODE)
    }

View on GitHub (pinned to 24f6a829df)

Solutions

1. Internal template packing limit hit. Split the oversized template into smaller components; if a normal template triggers this, report a bug to dioxus.

When it happens

Trigger: Thrown at packages/core-template/src/op.rs:18 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@24f6a829df (2026-08-23). Data as JSON: /api/errors/32f6e3f6ad0b5f31. Report an issue: GitHub.