Wrong lines when no source map

When in development, we don't generate sourcemaps and use babel-register to dynamically transpile the source code.
I noticed that if we load `require('source-map-support').install();` in that context, the error stack shows wrong line numbers.
Is it by design, implying that we should only install source-map-support when we know we're going to have sourcemap files available, or is it a bug in the module ?