I'm not sure what you consider a decent scala ide, but it was a problem with IntelliJ in several of our code bases, and I'd have to crawl the implicit resolution path.
I eventually opted to desugaring the scala completely, but we were already on the way out of scala by that point
> it was a problem with IntelliJ in several of our code bases
It shouldn't be, unless you were using macros (always officially experimental) or something - I was always primarily an Eclipse guy but IntelliJ worked well. Did you not get the green underline?