(Apologies if this has already been submitted: I couldn't find it in the issue list)

Version Used:

Visual Studio 15.9.4

Steps to Reproduce:

object x = (true, (IEnumerable<int>)new int[0]);

Expected Behavior:

IDE0004 does not fire.

Actual Behavior:

IDE0004 fires, suggesting:

object x = (true, new int[0]);

This creates a boxed (bool, int[]) instead of a boxed (bool, IEnumerable<int>).

Interestingly, this does not happen with var x = (true, (IEnumerable<int>)new int[0]).