Non-informative warning icons in solution explorer

[CyrusNajmabadi]

Something went wrong with a CPS-to-CPS p2p reference in my IDE:

However, there is no information that can be ascertained from these warning icons. The only warnings i have are:

[srivatsn]

@natidea mentioned that he saw a bug where the project reference was showing the error but the project wasn't. The analyzer warning issue is #1634 and I think it's because of non-normalized paths being treated incorrectly by the dependencies node.

[davkean]

We should have a rule; if there's a warning/error symbol in the Dependency node - there must to an actionable error/warning in the Error List. I'm seeing warnings everywhere in our tree - and no idea what they mean.

[srivatsn]

Try the repro from #2261 as well.

[MattGertz]

Agreed, but post-15.6 at this point.

[loop-evgeny]

It's especially confusing when the warning icon is on the Analyzers node, because that led me to believe the nodes under it represented warnings found in my code.

[drewnoakes]

This is quite a general issue, and a lot of stuff around this has been fixed recently. Without a repro to test against, I can't tell whether this is still happening.

We have some other issues to track the general case covered here. I suspect #5044 is the best fit here. Regarding the lack of information about the error itself we have #4357 and #3780. I'll close this. If someone has a repro that isn't covered by an existing issue, please file a new one.