# Deno v0.37.0 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v0.37.0
- **Released:** Mar 23, 2020
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/deno/updates/v0.37.0/

## Executive Summary (TL;DR)
Deno v0.37.0. Source highlight: BREAKING CHANGE: FileInfo.len renamed to FileName.size (#4338)

## Breaking Changes & Deprecations
- - BREAKING CHANGE: FileInfo.len renamed to FileName.size (#4338)
- - BREAKING CHANGE: Rename Deno.run's args to cmd (#4444)

## New Features
- feat(ci): Releases should all use zip and LLVM target triples (#4460)
- feat(console): Symbol.toStringTag and display Object symbol entries (#4388)
- feat(std/node): Add chmod Node polyfill (#4358)
- feat(std/node): Add node querystring polyfill (#4370)
- feat(std/node): Node polyfill for fs.chown and fs.close (#4377)
- feat(std/permissions): Add helper functions for permissions to std (#4258)

## Improvements
- perf: Optimize TextEncoder and TextDecoder (#4430, #4349)
- refactor: Improve test runner (#4336, #4352, #4356, #4371)

## Bug Fixes
- fix(std/http): Close open connections on server close (#3679)
- fix(std/http): Properly await ops in a server test (#4436)
- fix(std/http): Remove bad error handling (#4435)
- fix(std/node): Node polyfill fsAppend rework (#4322)
- fix(std/node): Stack traces for modules imported via require (#4035)
- fix: Importing JSON doesn't work in bundles (#4404)