Skip to content

repl: handle null thrown #14306

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 2 commits into from
Closed

repl: handle null thrown #14306

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
4dfe7fd
repl: don't terminate on null thrown
Jul 16, 2017
64ecdf0
Update test
benjamingr Jul 19, 2017
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 8 additions & 2 deletions lib/repl.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -283,17 +283,23 @@ function REPLServer(prompt,
self._domain.on('error', function debugDomainError(e) {
debug('domain error');
const top = replMap.get(self);

internalUtil.decorateErrorStack(e);
const isError = internalUtil.isError(e);
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Why not process.binding('util').isNativeError?

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@TimothyGu Not sure that's the behaviour I'd want - I'd like people to (optimally) be able to override Symbol.toStringTag (or even the name) and take the "Error like" path if they really need to.

I don't feel strongly about this though. If you do - let me know and I'll change it.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Sounds good to me.

if (e instanceof SyntaxError && e.stack) {
// remove repl:line-number and stack trace
e.stack = e.stack
.replace(/^repl:\d+\r?\n/, '')
.replace(/^\s+at\s.*\n?/gm, '');
} else if (e.stack && self.replMode === exports.REPL_MODE_STRICT) {
} else if (isError && self.replMode === exports.REPL_MODE_STRICT) {
e.stack = e.stack.replace(/(\s+at\s+repl:)(\d+)/,
(_, pre, line) => pre + (line - 1));
}
top.outputStream.write((e.stack || e) + '\n');
if (isError && e.stack) {
top.outputStream.write(`${e.stack}\n`);
} else {
top.outputStream.write(`Thrown: ${String(e)}\n`);
}
top.bufferedCommand = '';
top.lines.level = [];
top.displayPrompt();
Expand Down
24 changes: 24 additions & 0 deletions test/parallel/test-repl-null-thrown.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
'use strict';
require('../common');
const repl = require('repl');
const assert = require('assert');
const Stream = require('stream');

const output = new Stream();
let text = '';
output.write = output.pause = output.resume = function(buf) {
text += buf.toString();
};

const replserver = repl.start({
output: output,
input: process.stdin
});

replserver.emit('line', 'process.nextTick(() => { throw null; })');
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Is the process.nextTick necessary?

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@TimothyGu yes, to reproduce the issue - without the nextTick it doesn't crash the REPL.

replserver.emit('line', '.exit');

setTimeout(() => {
console.log(text);
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

extraneous console.log() output?

assert(text.includes('Thrown: null'));
}, 0);