fix(api): make api parse error stacks and return sourcePos in onTaskU…

…pdate

packages/vitest/src/api/setup.ts

@@ -1,4 +1,5 @@
 import { promises as fs } from 'node:fs'
+
 import type { BirpcReturn } from 'birpc'
 import { createBirpc } from 'birpc'
 import { parse, stringify } from 'flatted'
@@ -8,6 +9,7 @@ import { API_PATH } from '../constants'
 import type { Vitest } from '../node'
 import type { File, ModuleGraphData, Reporter, TaskResultPack, UserConsoleLog } from '../types'
 import { getModuleGraph } from '../utils'
+import { parseStacktrace } from '../utils/source-map'
 import type { TransformResultWithSource, WebSocketEvents, WebSocketHandlers } from './types'
 
 export function setup(ctx: Vitest) {
@@ -121,6 +123,11 @@ class WebSocketReporter implements Reporter {
     if (this.clients.size === 0)
       return
 
+    packs.forEach(([, result]) => {
+      if (result?.error)
+        result.error.stacks = parseStacktrace(result.error)
+    })
+
     this.clients.forEach((client) => {
       client.onTaskUpdate?.(packs)
     })

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

@@ -83,6 +83,11 @@ export function parseStacktrace(e: ErrorWithDiff, full = false): ParsedStack[] {
         file,
         line: parseInt(lineNumber),
         column: parseInt(columnNumber),
+        sourcePos: {
+          source: file,
+          line: parseInt(lineNumber),
+          column: parseInt(columnNumber),
+        },
       }
     })
     .filter(notNullish)