fix: ignore "No matching pid found" error

lib/resolveTaskFn.js

@@ -46,30 +46,41 @@ const handleOutput = (command, result, ctx, isError = false) => {
   }
 }
 
+/**
+ * Kill an execa process along with all its child processes.
+ * @param {execa.ExecaChildProcess<string>} execaProcess
+ */
+const killExecaProcess = async (execaProcess) => {
+  try {
+    const childPids = await pidTree(execaProcess.pid)
+    for (const childPid of childPids) {
+      process.kill(childPid)
+    }
+  } catch {
+    // Suppress "No matching pid found" error. This probably means
+    // the process already died before executing.
+  }
+
+  // The execa process is killed separately in order to get the `KILLED` status.
+  execaProcess.kill()
+}
+
 /**
  * Interrupts the execution of the execa process that we spawned if
  * another task adds an error to the context.
  *
  * @param {Object} ctx
  * @param {execa.ExecaChildProcess<string>} execaChildProcess
- * @returns {function(): void} Function that clears the interval that
+ * @returns {() => void} Function that clears the interval that
  * checks the context.
  */
 const interruptExecutionOnError = (ctx, execaChildProcess) => {
   let loopIntervalId
 
-  async function loop() {
+  const loop = async () => {
     if (ctx.errors.size > 0) {
       clearInterval(loopIntervalId)
-
-      const childPids = await pidTree(execaChildProcess.pid)
-      for (const pid of childPids) {
-        process.kill(pid)
-      }
-
-      // The execa process is killed separately in order
-      // to get the `KILLED` status.
-      execaChildProcess.kill()
+      await killExecaProcess(execaChildProcess)
     }
   }
 
@@ -111,7 +122,7 @@ const makeErr = (command, result, ctx) => {
  * @param {Array<string>} options.files — Filepaths to run the linter task against
  * @param {Boolean} [options.shell] — Whether to skip parsing linter task for better shell support
  * @param {Boolean} [options.verbose] — Always show task verbose
- * @returns {function(): Promise<Array<string>>}
+ * @returns {() => Promise<Array<string>>}
  */
 export const resolveTaskFn = ({
   command,