Invalid asm.js: Undefined global variable warning

I'm using sql.js version 0.5.0 in a react.js application and I have a warning in my browser that points to sql.js line 7, saying:
Invalid asm.js: Undefined global variable

But since the code is minified I'm not able to see why.

Any ideas how I can get rid of that warning ?

The report points to sql.js line 7 in the minified browser bundle; start by reproducing the warning with sql.js 0.5.0 in a React.js application and inspecting that generated line. Done means identifying the undefined global reported by the browser and establishing a verified change or configuration that removes the warning without breaking the library.