After PR #94 I now have wrong line numbers when using `eval`, but filen ames for every step in the trace:  with `cheap-module-source-map` I get right line numbers, but no file names for npm dependencies:  on place 6: "NewsStreamListWidget" the error is in line 16. I tried also some other devtools, with the same result. I tried version 1.4.1 and 1.4.2