yet unheard of edge-case.

diff --git a/libs/ardour/interpolation.cc b/libs/ardour/interpolation.cc
index 79b43bc58eefb2dd53252b7850103c81f56c8525..be4967b521ab151fb41eadf4a69e878b7a36f584 100644 (file)
--- a/libs/ardour/interpolation.cc
+++ b/libs/ardour/interpolation.cc
@@ -81,8 +81,10 @@ CubicInterpolation::interpolate (int channel, framecnt_t nframes, Sample *input,
     if (nframes < 3) {
            /* no interpolation possible */
 
-           for (i = 0; i < nframes; ++i) {
-                   output[i] = input[i];
+           if (input && output) {
+                   for (i = 0; i < nframes; ++i) {
+                           output[i] = input[i];
+                   }
            }
 
            return nframes;