This reminds me of the time Mozilla attempted to improve Firefox's error message for undefined property accesses, but it caused breaking changes because some we

This reminds me of the time Mozilla attempted to improve Firefox's error message for undefined property accesses, but it caused breaking changes because some websites relied on parsing the old error message format, so nothing could be done to improve it. https://bugzilla.mozilla.org/show_bug.cgi?id=1488417 https://bugzilla.mozilla.org/show_bug.cgi?id=1488417 https://news.ycombinator.com/item?id=19493433 https://news.ycombinator.com/item?id=19493433