Always call handleError asynchronously

This doesn’t match the original behaviour of the type errors, but it’s correct.

Author: charmander

Diff for: lib/client.js

@@ -383,9 +383,11 @@ Client.prototype._pulseQueryQueue = function () {
 
       const queryError = this.activeQuery.submit(this.connection)
       if (queryError) {
-        this.activeQuery.handleError(queryError, this.connection)
-        this.readyForQuery = true
-        this._pulseQueryQueue()
+        process.nextTick(() => {
+          this.activeQuery.handleError(queryError, this.connection)
+          this.readyForQuery = true
+          this._pulseQueryQueue()
+        })
       }
     } else if (this.hasExecuted) {
       this.activeQuery = null
@@ -423,12 +425,16 @@ Client.prototype.query = function (config, values, callback) {
   }
 
   if (!this._queryable) {
-    query.handleError(new Error('Client has encountered a connection error and is not queryable'), this.connection)
+    process.nextTick(() => {
+      query.handleError(new Error('Client has encountered a connection error and is not queryable'), this.connection)
+    })
     return
   }
 
   if (this._ending) {
-    query.handleError(new Error('Client was closed and is not queryable'), this.connection)
+    process.nextTick(() => {
+      query.handleError(new Error('Client was closed and is not queryable'), this.connection)
+    })
     return
   }