oven-sh/bun · error · Error

validateUint32 can only be used on i32 or u32

Error message

validateUint32 can only be used on i32 or u32

What it means

Error "validateUint32 can only be used on i32 or u32" thrown in oven-sh/bun.

Source

Thrown at src/codegen/bindgen-lib-internal.ts:607

      throw new Error("Cannot derive nonNull on a nonNull type");
    }
    return new TypeImpl(this.kind, this.data, {
      ...this.flags,
      nonNull: true,
    });
  }

  validateInt32(min?: number, max?: number) {
    if (this.kind !== "i32") {
      throw new Error("validateInt32 can only be used on i32 or u32");
    }
    const rangeInfo = cAbiIntegerLimits("i32");
    return this.validateInteger(min ?? rangeInfo[0], max ?? rangeInfo[1]);
  }

  validateUint32(min?: number, max?: number) {
    if (this.kind !== "u32") {
      throw new Error("validateUint32 can only be used on i32 or u32");
    }
    const rangeInfo = cAbiIntegerLimits("u32");
    return this.validateInteger(min ?? rangeInfo[0], max ?? rangeInfo[1]);
  }

  validateInteger(min?: number | bigint, max?: number | bigint) {
    min ??= Number.MIN_SAFE_INTEGER;
    max ??= Number.MAX_SAFE_INTEGER;
    const enforceRange = this.#rangeModifier(min, max, "enforce") as TypeImpl;
    enforceRange.flags.nodeValidator = NodeValidator.validateInteger;
    return enforceRange;
  }
}

export function cAbiIntegerLimits(type: CAbiType) {
  switch (type) {
    case "u8":
      return [0, 255];

View on GitHub (pinned to 8c5296ac45)

When it happens

Trigger: Thrown at src/codegen/bindgen-lib-internal.ts:607 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of oven-sh/bun@8c5296ac45 (2026-08-16). Data as JSON: /api/errors/ef38584edf35f855. Report an issue: GitHub.