Support mixed eval & non-eval stack traces

[LachlanStuart]

This builds on the change in #94 to support stack traces that contain both eval and non-eval lines. I suspect these mixed stack traces are coming from my vendor bundle having been built with source-map, while my application bundle is built with cheap-module-eval-source-map.

Example JSONified stackLines that is only supported after this change:

[
" at _default (eval at ./src/routes.js (http://localhost:3000/app.js?ef9dba4c6d4b1c818e5b:11663:1), :357:171)",
" at new Root (eval at ./src/containers/Root.js (http://localhost:3000/app.js?ef9dba4c6d4b1c818e5b:8598:1), :27:94)",
" at eval (eval at ./node_modules/react-proxy/modules/createClassProxy.js (http://localhost:3000/app.js?ef9dba4c6d4b1c818e5b:4180:1), :95:24)",
" at instantiate (eval at ./node_modules/react-proxy/modules/createClassProxy.js (http://localhost:3000/app.js?ef9dba4c6d4b1c818e5b:4180:1), :103:9)",
" at Root (eval at proxyClass (eval at ./node_modules/react-proxy/modules/createClassProxy.js (http://localhost:3000/app.js?ef9dba4c6d4b1c818e5b:4180:1)), :4:17)",
" at eval (webpack:///./~/react-dom/lib/ReactCompositeComponent.js?:306:16)",
" at measureLifeCyclePerf (webpack:///./~/react-dom/lib/ReactCompositeComponent.js?:75:12)",
" at ReactCompositeComponentWrapper._constructComponentWithoutOwner (webpack:///./~/react-dom/lib/ReactCompositeComponent.js?:305:14)",
" at ReactCompositeComponentWrapper._constructComponent (webpack:///./~/react-dom/lib/ReactCompositeComponent.js?:280:21)",
" at ReactCompositeComponentWrapper.mountComponent (webpack:///./~/react-dom/lib/ReactCompositeComponent.js?:188:21)"
]

[borela]

You could add a // TODO: ... comment there too so that in the future we remember to look at a way to load even mixed stacks.

[davidpfahler]

Looks good to me. @borela? Now if you could change your commit message to something that starts with feat: I think this is ready to go live.

[borela]

Looks good to me too, I was just saying that in the future this could be upgraded to try to load the source maps too. It is not trivial to code but possible.

[LachlanStuart]

I have amended the commit by adding a // TODO and prepending feat: to the commit message.