Error when compiled using webpack compressing options

I am using webpack 4 and uglifying my code for prod build. But, I get an error for the sql.js package on the prod build only, not in dev. Basically I get this error when trying to call any sql operations such creating a table or inserting rows.

Start by reproducing the webpack 4 production build with compression enabled, then compare it with the working development build while exercising table creation and row insertion in sql.js. The report names no source file, test, or entry point; done means the compressed production build completes and those SQL operations work without the reported error.