fix(dev): track cold forks in the pool so shutdown reaps them

Author: danielroe

packages/nuxt-cli/src/dev/pool.ts

@@ -99,6 +99,7 @@ export class ForkPool {
 // No forks in pool, create a cold fork
 debug('No pre-warmed forks available, starting cold fork')
 constcoldFork=this.createFork()
+this.pool.push(coldFork)
 awaitcoldFork.ready
 coldFork.state='active'
 if(onMessage){

packages/nuxt-cli/test/unit/fork-pool.spec.ts

@@ -35,6 +35,18 @@ describe('forkPool', () => {
 expect(pool.getStats().total).toBe(1)
 })
 
+it('should reap a cold fork on shutdown',{timeout: 30_000},async()=>{
+constpool=createPool(0)
+awaitpool.getFork({cwd: '/some/project',args: {}})
+expect(pool.getStats()).toMatchObject({total: 1,active: 1})
+
+const[child]=(poolasunknownas{pool: Array<{process: ChildProcess}>}).pool.map(f=>f.process)
+;(poolasunknownas{killAll: (signal: number)=>void}).killAll(0)
+awaitvi.waitFor(()=>{
+expect(child!.killed).toBe(true)
+},{timeout: 10_000,interval: 25})
+})
+
 it('should kill every fork on shutdown',{timeout: 30_000},async()=>{
 constpool=createPool(3)
 pool.startWarming()