}

		// Skip initial spaces in value.
		value := string(bytes.TrimLeft(v, " \t"))

		vv := m[key]
		if vv == nil {
			maxMemory -= int64(len(key))
			maxMemory -= mapEntryOverhead
		}
		maxMemory -= int64(len(value))
		if maxMemory < 0 {
			return m, errMessageTooLarge
		}
		if vv == nil && len(strs) > 0 {
			// More than likely this will be a single-element key.

	if err != nil {
		t.Fatal(err)
	}
	if hdr.Filename != "foobar.txt" {
		t.Errorf("expected only the last element of the path, got %q", hdr.Filename)
	}
}

// Issue #40430: Test that if maxMemory for ParseMultipartForm when combined with
// the payload size and the internal leeway buffer size of 10MiB overflows, that we
// correctly return an error.
func TestMaxInt64ForMultipartFormMaxMemoryOverflow(t *testing.T) {