Revert "[temporary] disable spans over inline elements"

This reverts commit 7b03593.

Author: glessard

stdlib/public/core/CollectionOfOne.swift

@@ -168,7 +168,6 @@ extension CollectionOfOne {
     get {
       let pointer = unsafe UnsafePointer<Element>(Builtin.addressOfBorrow(self))
       let span = unsafe Span(_unsafeStart: pointer, count: 1)
-      fatalError("Span over CollectionOfOne is not supported yet.")
       return unsafe _overrideLifetime(span, borrowing: self)
     }
   }

stdlib/public/core/InlineArray.swift

@@ -470,7 +470,6 @@ extension InlineArray where Element: ~Copyable {
     borrowing get {
       let pointer = _address
       let span = unsafe Span(_unsafeStart: pointer, count: count)
-      fatalError("Span over InlineArray is not supported yet.")
       return unsafe _overrideLifetime(span, borrowing: self)
     }
   }

test/stdlib/Span/InlineSpanProperties.swift

@@ -23,7 +23,6 @@ var suite = TestSuite("Span properties backed by inline storage")
 defer { runAllTests() }
 
 suite.test("CollectionOfOne.span property")
-.skip(.wasiAny(reason: "Trap tests aren't supported on WASI."))
 .skip(.custom(
   { if #available(SwiftStdlib 6.2, *) { false } else { true } },
   reason: "Requires Swift 6.2's standard library"
@@ -35,15 +34,13 @@ suite.test("CollectionOfOne.span property")
   let u = Array(s.utf8)
   let c = CollectionOfOne(consume s)
   s = ""
-  expectCrashLater()
   let span = c.span
   expectEqual(span.count, 1)
   let v = Array(span[0].utf8)
   expectEqual(u, v)
 }
 
 suite.test("CollectionOfOne.span property (simple)")
-.skip(.wasiAny(reason: "Trap tests aren't supported on WASI."))
 .skip(.custom(
   { if #available(SwiftStdlib 6.2, *) { false } else { true } },
   reason: "Requires Swift 6.2's standard library"
@@ -52,7 +49,6 @@ suite.test("CollectionOfOne.span property (simple)")
   guard #available(SwiftStdlib 6.2, *) else { return }
 
   let c = CollectionOfOne(Int.random(in: 0..<100000))
-  expectCrashLater()
   let span = c.span
   expectEqual(span.count, c.indices.count)
   expectEqual(span[0], c[0])
@@ -63,7 +59,6 @@ struct Padded: BitwiseCopyable {
 }
 
 suite.test("CollectionOfOne.span stride test")
-.skip(.wasiAny(reason: "Trap tests aren't supported on WASI."))
 .skip(.custom(
   { if #available(SwiftStdlib 6.2, *) { false } else { true } },
   reason: "Requires Swift 6.2's standard library"
@@ -72,14 +67,12 @@ suite.test("CollectionOfOne.span stride test")
   guard #available(SwiftStdlib 6.2, *) else { return }
 
   let c = CollectionOfOne(Padded(storage: (-1, 1)))
-  expectCrashLater()
   let span = c.span
   let bytes = span.bytes
   expectEqual(bytes.byteCount, MemoryLayout.size(ofValue: c))
 }
 
 suite.test("InlineArray.span property")
-.skip(.wasiAny(reason: "Trap tests aren't supported on WASI."))
 .skip(.custom(
   { if #available(SwiftStdlib 6.2, *) { false } else { true } },
   reason: "Requires Swift 6.2's standard library"
@@ -89,7 +82,6 @@ suite.test("InlineArray.span property")
 
   var s = InlineArray<5, Int>(repeating: 0)
   s[3] = .random(in: 0..<1000)
-  expectCrashLater()
   let span = s.span
   expectEqual(span.count, s.count)
   for i in s.indices {
@@ -98,7 +90,6 @@ suite.test("InlineArray.span property")
 }
 
 suite.test("InlineArray.span property (String)")
-.skip(.wasiAny(reason: "Trap tests aren't supported on WASI."))
 .skip(.custom(
   { if #available(SwiftStdlib 6.2, *) { false } else { true } },
   reason: "Requires Swift 6.2's standard library"
@@ -108,7 +99,6 @@ suite.test("InlineArray.span property (String)")
 
   var s = InlineArray<5, String>(repeating: "0")
   s[3] = String(Int.random(in: 0..<1000))
-  expectCrashLater()
   let span = s.span
   expectEqual(span.count, s.count)
   for i in s.indices {