fix(lib/modules/metro): default initializing module ID to null

lib/modules/src/metro/_internal.ts

@@ -3,7 +3,7 @@ import { isModuleExportsBad } from './utils'
 import type { Metro } from '../types'
 
 /** Initializing ID */
-export let _initing = -1
+export let _initing: Metro.ModuleID | null = null
 /** Known uninitialized IDs */
 export const _uninits = new Set<Metro.ModuleID>()
 /** Known initialized IDs (not blacklisted) */

lib/modules/src/metro/patches.ts

@@ -9,7 +9,7 @@ const unsubFFI = waitForModules(byProps('fileFinishedImporting'), exports => {
     const orig = exports.fileFinishedImporting
     exports.fileFinishedImporting = (path: string) => {
         orig(path)
-        const id = _initing
+        const id = _initing!
         _paths.set(path, id)
         _execPathSubs(id, path)
     }