repl: attach location info to syntax errors

Currently, when a file with a syntax error is imported in the REPL, no information is provided on the error's location. This commit adds the error's location to the stack trace. Refs: #2762 Refs: #3411 Refs: #3784 PR-URL: #4013 Reviewed-By: Ben Noordhuis <[email protected]>

Author: cjihrig

lib/repl.js

@@ -274,6 +274,7 @@ function REPLServer(prompt,
 self._domain.on('error',function(e){
 debug('domain error');
 consttop=replMap.get(self);
+util.decorateErrorStack(e);
 top.outputStream.write((e.stack||e)+'\n');
 top.lineParser.reset();
 top.bufferedCommand='';

test/parallel/test-repl-syntax-error-stack.js

@@ -0,0 +1,39 @@
+'use strict';
+
+constcommon=require('../common');
+constassert=require('assert');
+constpath=require('path');
+constrepl=require('repl');
+constutil=require('util');
+letfound=false;
+
+process.on('exit',()=>{
+assert.strictEqual(found,true);
+});
+
+// A stream to push an array into a REPL
+functionArrayStream(){
+this.run=function(data){
+data.forEach(line=>{
+this.emit('data',line+'\n');
+});
+};
+}
+util.inherits(ArrayStream,require('stream').Stream);
+ArrayStream.prototype.readable=true;
+ArrayStream.prototype.writable=true;
+ArrayStream.prototype.resume=function(){};
+ArrayStream.prototype.write=function(output){
+if(/varfoobar;/.test(output))
+found=true;
+};
+
+constputIn=newArrayStream();
+consttestMe=repl.start('',putIn);
+letfile=path.resolve(__dirname,'../fixtures/syntax/bad_syntax');
+
+if(common.isWindows)
+file=file.replace(/\\/g,'\\\\');
+
+putIn.run(['.clear']);
+putIn.run([`require('${file}');`]);