fix: do not fail, when primitive error is thrown (#3074)

packages/vitest/src/api/setup.ts

@@ -9,7 +9,7 @@ import type { ViteDevServer } from 'vite'
 import { API_PATH } from '../constants'
 import type { Vitest } from '../node'
 import type { File, ModuleGraphData, Reporter, TaskResultPack, UserConsoleLog } from '../types'
-import { getModuleGraph } from '../utils'
+import { getModuleGraph, isPrimitive } from '../utils'
 import { parseErrorStacktrace } from '../utils/source-map'
 import type { TransformResultWithSource, WebSocketEvents, WebSocketHandlers } from './types'
 
@@ -140,10 +140,11 @@ class WebSocketReporter implements Reporter {
 
     packs.forEach(([, result]) => {
       // TODO remove after "error" deprecation is removed
-      if (result?.error)
+      if (result?.error && !isPrimitive(result.error))
         result.error.stacks = parseErrorStacktrace(result.error)
       result?.errors?.forEach((error) => {
-        error.stacks = parseErrorStacktrace(error)
+        if (!isPrimitive(error))
+          error.stacks = parseErrorStacktrace(error)
       })
     })
 

packages/vitest/src/node/core.ts

@@ -721,7 +721,7 @@ export class Vitest {
   isBrowserEnabled() {
     if (this.config.browser.enabled)
       return true
-    return (this.config.poolMatchGlobs || []).some(([, pool]) => pool === 'browser')
+    return this.config.poolMatchGlobs?.length && this.config.poolMatchGlobs.some(([, pool]) => pool === 'browser')
   }
 
   // The server needs to be running for communication

packages/vitest/src/node/error.ts

@@ -9,6 +9,7 @@ import type { ErrorWithDiff, ParsedStack } from '../types'
 import { lineSplitRE, parseErrorStacktrace, positionToOffset } from '../utils/source-map'
 import { F_POINTER } from '../utils/figures'
 import { TypeCheckError } from '../typecheck/typechecker'
+import { isPrimitive } from '../utils'
 import type { Vitest } from './core'
 import { divider } from './reporters/renderers/utils'
 import type { Logger } from './logger'
@@ -23,10 +24,10 @@ export async function printError(error: unknown, ctx: Vitest, options: PrintErro
   const { showCodeFrame = true, fullStack = false, type } = options
   let e = error as ErrorWithDiff
 
-  if (typeof error === 'string') {
+  if (isPrimitive(e)) {
     e = {
-      message: error.split(/\n/g)[0],
-      stack: error,
+      message: String(error).split(/\n/g)[0],
+      stack: String(error),
     } as any
   }
 

packages/vitest/src/utils/base.ts

@@ -19,6 +19,10 @@ export function groupBy<T, K extends string | number | symbol>(collection: T[],
   }, {} as Record<K, T[]>)
 }
 
+export function isPrimitive(value: unknown) {
+  return value === null || (typeof value !== 'function' && typeof value !== 'object')
+}
+
 export function getAllMockableProperties(obj: any, isModule: boolean) {
   const allProps = new Map<string | symbol, { key: string | symbol; descriptor: PropertyDescriptor }>()
   let curr = obj

packages/vitest/src/utils/source-map.ts

@@ -1,6 +1,6 @@
 import { resolve } from 'pathe'
 import type { ErrorWithDiff, ParsedStack } from '../types'
-import { notNullish } from './base'
+import { isPrimitive, notNullish } from './base'
 
 export const lineSplitRE = /\r?\n/
 
@@ -92,7 +92,7 @@ export function parseStacktrace(stack: string, full = false): ParsedStack[] {
 }
 
 export function parseErrorStacktrace(e: ErrorWithDiff, full = false): ParsedStack[] {
-  if (!e)
+  if (!e || isPrimitive(e))
     return []
 
   if (e.stacks)

test/fails/fixtures/primitive-error.test.ts

@@ -0,0 +1,6 @@
+import { test } from 'vitest'
+
+test('primitive error thrown', () => {
+  // eslint-disable-next-line no-throw-literal
+  throw 42
+})

test/fails/test/__snapshots__/runner.test.ts.snap

@@ -19,6 +19,8 @@ exports[`should fails > mock-import-proxy-module.test.ts > mock-import-proxy-mod
 
 exports[`should fails > nested-suite.test.ts > nested-suite.test.ts 1`] = `"AssertionError: expected true to be false // Object.is equality"`;
 
+exports[`should fails > primitive-error.test.ts > primitive-error.test.ts 1`] = `"Unknown Error: 42"`;
+
 exports[`should fails > stall.test.ts > stall.test.ts 1`] = `
 "TypeError: failure
 TypeError: failure