IDE0301 code fixer in ternary expression produces invalid C# code (CS0029)

[Sergio0694]

Version Used: 4.12.0-3.24523.10 (16f58fa)'. Language version: 13.0

Steps to Reproduce:

1. Paste this code in a blank new console:

using System.Collections.Immutable;

static IEnumerable<string> M(object obj)
{
    return obj is int
        ? Enumerable.Empty<string>()
        : Enumerable.Repeat("", 1);
}

2. Hover over "Empty" and apply the suggested IDE0301 code fixer.

Diagnostic Id: IDE0301

Expected Behavior:

Should now get a code fixer here. Arguably you shouldn't get IDE0301 in the first place.

Actual Behavior:

You get IDE0301, and the code fixer breaks the code entirely:

cc. @CyrusNajmabadi

[CyrusNajmabadi]

Ide feature looks correct. This looks to be a parsing issue (parsing int?[] as an array of nullable ints instead of a conditional expr with a collection expr)

[RikkiGibson]

I'm not reproing on SharpLab (which I'm happy to see was updated today).

[CyrusNajmabadi]

Fixed with #75328