deepseek-ai/deepseek-harness · error

PROCESS_INFORMATION layout mismatch: koffi computed ${PROCES

Error message

PROCESS_INFORMATION layout mismatch: koffi computed ${PROCESS_INFORMATION.size}, header probe says ${abi.PROCESS_INFORMATION_SIZE}

What it means

Error "PROCESS_INFORMATION layout mismatch: koffi computed ${PROCESS_INFORMATION.size}, header probe says ${abi.PROCESS_INFORMATION_SIZE}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/sandbox/sandbox-windows-acl/src/ffi.ts:176

  hStdInput: PVOID,
  hStdOutput: PVOID,
  hStdError: PVOID,
})

/** koffi PROCESS_INFORMATION layout; its size is asserted against abi.PROCESS_INFORMATION_SIZE at load. */
export const PROCESS_INFORMATION = koffi.struct('PROCESS_INFORMATION', {
  hProcess: PVOID,
  hThread: PVOID,
  dwProcessId: 'uint32',
  dwThreadId: 'uint32',
})

/* v8 ignore start -- layout-mismatch guards fire only on ABI breakage; verify/abi-probe.cpp pins both sizes. */
if (STARTUPINFOW.size !== abi.STARTUPINFOW_SIZE) {
  throw new Error(`STARTUPINFOW layout mismatch: koffi computed ${STARTUPINFOW.size}, header probe says ${abi.STARTUPINFOW_SIZE}`)
}
if (PROCESS_INFORMATION.size !== abi.PROCESS_INFORMATION_SIZE) {
  throw new Error(`PROCESS_INFORMATION layout mismatch: koffi computed ${PROCESS_INFORMATION.size}, header probe says ${abi.PROCESS_INFORMATION_SIZE}`)
}
/* v8 ignore stop */

/**
 * Allocate one pointer-sized slot (for `T **` out-parameters).
 * @returns the allocated slot pointer.
 */
export function allocPtrSlot(): NativePtr {
  const value: unknown = koffi.alloc(PVOID, 1)
  return value as NativePtr
}

/**
 * Allocate one uint32 slot.
 * @returns the allocated slot pointer.
 */
export function allocUint32(): NativePtr {
  const value: unknown = koffi.alloc('uint32', 1)

View on GitHub (pinned to b150a551b8)

Solutions

1. Rebuild or update the addon/koffi so the PROCESS_INFORMATION struct size matches the header ABI probe.

When it happens

Trigger: Thrown at packages/sandbox/sandbox-windows-acl/src/ffi.ts:176 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/2cc2be56f4aea171. Report an issue: GitHub.