return "?";
            }
        }

        assert bounds.length > 0;

        boolean first = true;
        for (TypeWrapper bound : bounds) {
            if (!first) {
                sb.append(" & ");
            }

            first = false;
            sb.append(bound.getRepresentation(full));
        }

        return sb.toString();
    }

	// We want to trigger a bounds check on the g0 stack. To do this, we
	// need to call a splittable function through systemstack().
	// SetGCPercent contains such a systemstack call.
	gogc := debug.SetGCPercent(100)
	debug.SetGCPercent(gogc)
}

// Regression test for https://go.dev/issue/62440. It should be possible for C
// threads to call into Go from different stacks without crashing due to g0
// stack bounds checks.
//

				continue
			}
			img1, err := Decode(&w)
			if err != nil {
				t.Errorf("failed to decode roundtripped image: %s", err)
				continue
			}
			got := img1.Bounds()
			want := img.Bounds()
			if !got.Eq(want) {
				t.Errorf("roundtripped image bounds have changed, got: %s, want: %s", got, want)
			}
		}
	})

	// that call returning and now the stack may have changed (perhaps the
	// C thread is running a coroutine library). We need to update the
	// stack bounds for this case.
	//
	// N.B. we need to update the stack bounds even if SP appears to
	// already be in bounds. Our "bounds" may actually be estimated dummy
	// bounds (below). The actual stack bounds could have shifted but still

  }

  private static Bounds every(Type[] bounds) {
    // Every bound must match. On any false, result is false.
    return new Bounds(bounds, false);
  }

  private static Bounds any(Type[] bounds) {
    // Any bound matches. On any true, result is true.
    return new Bounds(bounds, true);
  }

  private static class Bounds {
    private final Type[] bounds;

		cb, cr [4]block
		// DC components are delta-encoded.
		prevDCY, prevDCCb, prevDCCr int32
	)
	bounds := m.Bounds()
	switch m := m.(type) {
	// TODO(wathiede): switch on m.ColorModel() instead of type.
	case *image.Gray:
		for y := bounds.Min.Y; y < bounds.Max.Y; y += 8 {
			for x := bounds.Min.X; x < bounds.Max.X; x += 8 {
				p := image.Pt(x, y)
				grayToY(m, p, &b)
				prevDCY = e.writeBlock(&b, 0, prevDCY)
			}

		if r == nil {
			panic("no fault or bounds check failure happened")
		}
		s := fmt.Sprintf("%s", r)
		if s != "runtime error: index out of range [1] with length 1" {
			panic("bad panic: " + s)
		}
	}()
	return uint16(x[i]) | uint16(x[i+1])<<8
}

func test32(x []byte) uint32 {
	defer func() {
		r := recover()
		if r == nil {
			panic("no fault or bounds check failure happened")
		}

		tname := types.NewTypeName(pos, pkg, name, nil)
		r.dict.tparams[i] = types.NewTypeParam(tname, nil)
	}

	typs := make([]types.Type, len(r.dict.bounds))
	for i, bound := range r.dict.bounds {
		typs[i] = r.p.typIdx(bound, r.dict)
	}

	// TODO(mdempsky): This is subtle, elaborate further.
	//
	// We have to save tparams outside of the closure, because

	check("nil-deref-big", func() { println(q[5000]) }, "nil pointer dereference")

	i = 99999
	var sl []int
	p1 := new([10]int)
	check("array-bounds", func() { println(p1[i]) }, "index out of range")
	check("slice-bounds", func() { println(sl[i]) }, "index out of range")

	var inter interface{}
	inter = 1
	check("type-concrete", func() { println(inter.(string)) }, "int, not string")

//go:noinline
func f16(p *uint8, b []byte) {
	_ = b[1]            // bounds check
	x := *p             // load a byte
	y := uint16(x)      // zero extend to 16 bits
	b[0] = byte(y >> 8) // compute ROLW
	b[1] = byte(y)
	nop()               // spill/restore ROLW
	b[0] = byte(y >> 8) // use ROLW
	b[1] = byte(y)
}

//go:noinline
func f32(p *uint8, b []byte) {
	_ = b[3]             // bounds check
	x := *p              // load a byte