Take the following example. Compiled with <OtherFlags>$(OtherFlags) --warnon:3395</OtherFlags> it produces no warnings on the constructor.
open System
// Minimized copy for demonstration of Microsoft.Extensions.Primitives.StringValues
type StringValues(v: string) =
static member op_Implicit(values: StringValues): string = ""
type Foo(_v: Nullable<int>) =
member val Test: Nullable<int> = 0 with get,set // Warning for 3391 as I would have interpreted it.
member val StringValue: string = "" with get,set
static member Create() =
let value = 1
let instance = Foo(value, Test = value) // No warning on either the argument or the property setter?
instance.Test <- value // No warning for 3395 and 3391?
instance.StringValue <- StringValues("1") // Warning for 3395
let mutable test: Nullable<int> = value // Warning for 3391 as I would have interpreted it.
// Warning for 3391 but it's syntactically identical to the line that had no warning and one that had 3395???
test <- 1 
Take the following example. Compiled with
<OtherFlags>$(OtherFlags) --warnon:3395</OtherFlags>it produces no warnings on the constructor.