t.Errorf("%s: got offset %v, want %v", src, pos.Offset, strings.Index(src, "range"))
				}
			}
			return true
		})
	}
}

// TestIssue59180 tests that line number overflow doesn't cause an infinite loop.
func TestIssue59180(t *testing.T) {
	testcases := []string{
		"package p\n//line :9223372036854775806\n\n//",
		"package p\n//line :1:9223372036854775806\n\n//",