val iterator = cache.snapshots()
    iterator.next().use {
      assertThat(it.key()).isEqualTo("a")
    }
    set("b", "b3", "b4")
    iterator.next().use {
      assertThat(it.key()).isEqualTo("b")
      it.assertValue(0, "b3")
      it.assertValue(1, "b4")
    }
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)

//                 if ... goto b3 else b4
//
//   b3: x3 = LoadReg x2 : BX       b4: x4 = LoadReg x2 : CX
//       ... use x3 ...                 ... use x4 ...
//
//             b2: ... use x3 ...
//
// If b3 is the primary predecessor of b2, then we use x3 in b2 and
// add a x4:CX->BX copy at the end of b4.
// But the definition of x3 doesn't dominate b2.  We should really

		{`package b0; var _ = false`, `false`, `bool`, `false`},
		{`package b1; var _ = 0`, `0`, `int`, `0`},
		{`package b2; var _ = 'A'`, `'A'`, `rune`, `65`},
		{`package b3; var _ = 0.`, `0.`, `float64`, `0`},
		{`package b4; var _ = 0i`, `0i`, `complex128`, `(0 + 0i)`},
		{`package b5; var _ = "foo"`, `"foo"`, `string`, `"foo"`},

		{`package c0a; var _ = bool(false)`, `false`, `bool`, `false`},

		{`package b0; var _ = false`, `false`, `bool`, `false`},
		{`package b1; var _ = 0`, `0`, `int`, `0`},
		{`package b2; var _ = 'A'`, `'A'`, `rune`, `65`},
		{`package b3; var _ = 0.`, `0.`, `float64`, `0`},
		{`package b4; var _ = 0i`, `0i`, `complex128`, `(0 + 0i)`},
		{`package b5; var _ = "foo"`, `"foo"`, `string`, `"foo"`},

		{`package c0a; var _ = bool(false)`, `false`, `bool`, `false`},

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