c <- err
	}()

	select {
	case err := <-c:
		if err == nil {
			t.Error("error expected")
		} else if err != io.ErrNoProgress {
			t.Error("unexpected error:", err)
		}
	case <-time.After(time.Second):
		t.Error("test timed out (endless loop in ReadByte?)")
	}
}

// A StringReader delivers its data one string segment at a time via Read.
type StringReader struct {
	data []string
	step int
}

	Mode     fs.FileMode
	NonUTF8  bool
	ModTime  time.Time
	Modified time.Time

	// Information describing expected zip file content.
	// First, reading the entire content should produce the error ContentErr.
	// Second, if ContentErr==nil, the content should match Content.
	// If content is large, an alternative to setting Content is to set File,
	// which names a file in the testdata/ directory containing the
	// uncompressed expected content.

			// As of https://reviews.llvm.org/D123534, clang
			// now emits DW_TAG_variable DIEs that have
			// no name (so as to be able to describe the
			// type and source locations of constant strings)
			// like the second arg in the call below:
			//
			//     myfunction(42, "foo")
			//
			// If a var has no name we won't see attempts to
			// refer to it via "C.<name>", so skip these vars
			//