OverFlowOnFluentCall_ExtensionMethods is failing

[333fred]

System.Exception : Depth: 1600, Bytes: 4, Config: Release, Desktop: True
---- System.AggregateException : One or more errors occurred.

Expected:
Actual:
// (10,9): error CS8078: An expression is too long or complex to compile
//         GetC()
Diagnostic(ErrorCode.ERR_InsufficientStack, "GetC").WithLocation(10, 9)
Diff:
++>                 Diagnostic(ErrorCode.ERR_InsufficientStack, "GetC").WithLocation(10, 9)
Expected: True
Actual:   False

Expected:
Actual:
// (10,9): error CS8078: An expression is too long or complex to compile
//         GetC()
Diagnostic(ErrorCode.ERR_InsufficientStack, "GetC").WithLocation(10, 9)
Diff:
++>                 Diagnostic(ErrorCode.ERR_InsufficientStack, "GetC").WithLocation(10, 9)
Expected: True
Actual:   False

[jaredpar]

Moving to 17.10 because want to know the impact and evaluate if we want to fix the compiler in 17.10 or 17.11.

@jcouv