uglify-js 3.19.0 causes lost code

[yisibl]

Uglify version (uglifyjs -V)

v3.19.0

JavaScript input

day.js v1.10.7 (The code that has been compressed)

What's the problem?

See: Example repository https://github.com/yisibl/uglify-js-issue

uglify-js 3.19.0 causes an issue with compression losing code, the .init=function() function is missing from build_3_19/day.js.

This does not happen in version 3.18.0, compare the difference between the files in build_3_18/day.js and build_3_19/day.js.

[alexlamsl]

Thank you for the report − investigating.

[alexlamsl]

Patch released in uglify-js@3.19.2