diff --git a/src/lib/notcurses.c b/src/lib/notcurses.c
index 9d49d879e..5a96d94bd 100644
--- a/src/lib/notcurses.c
+++ b/src/lib/notcurses.c
@@ -335,24 +335,23 @@ static int
 ncplane_resize_internal(ncplane* n, int keepy, int keepx, int keepleny,
                        int keeplenx, int yoff, int xoff, int ylen, int xlen){
   if(keepleny < 0 || keeplenx < 0){ // can't retain negative size
-    fprintf(stderr, "Can't retain negative size %dx%d\n", keepleny, keeplenx);
+//fprintf(stderr, "Can't retain negative size %dx%d\n", keepleny, keeplenx);
     return -1;
   }
   if(ylen <= 0 || xlen <= 0){ // can't resize to trivial or negative size
-    fprintf(stderr, "Can't achieve negative size %dx%d\n", ylen, xlen);
+//fprintf(stderr, "Can't achieve negative size %dx%d\n", ylen, xlen);
     return -1;
   }
   if((!keepleny && keeplenx) || (keepleny && !keeplenx)){ // both must be 0
-    fprintf(stderr, "Can't keep zero dimensions %dx%d\n", keepleny, keeplenx);
+//fprintf(stderr, "Can't keep zero dimensions %dx%d\n", keepleny, keeplenx);
     return -1;
   }
   if(ylen < keepleny || xlen < keeplenx){ // can't be smaller than our keep
-    fprintf(stderr, "Can't violate space %dx%d vs %dx%d\n", keepleny, keeplenx, ylen, xlen);
+//fprintf(stderr, "Can't violate space %dx%d vs %dx%d\n", keepleny, keeplenx, ylen, xlen);
     return -1;
   }
   int rows, cols;
   ncplane_dim_yx(n, &rows, &cols);
-  // FIXME make sure we're not trying to keep more than we have?
 /*fprintf(stderr, "NCPLANE(RESIZING) to %dx%d at %d/%d (keeping %dx%d from %d/%d)\n",
         ylen, xlen, yoff, xoff, keepleny, keeplenx, keepy, keepx);*/
   // we're good to resize. we'll need alloc up a new framebuffer, and copy in
@@ -428,7 +427,7 @@ ncplane_resize_internal(ncplane* n, int keepy, int keepx, int keepleny,
 int ncplane_resize(ncplane* n, int keepy, int keepx, int keepleny,
                    int keeplenx, int yoff, int xoff, int ylen, int xlen){
   if(n == n->nc->stdscr){
-    fprintf(stderr, "Can't resize standard plane\n");
+//fprintf(stderr, "Can't resize standard plane\n");
     return -1;
   }
   return ncplane_resize_internal(n, keepy, keepx, keepleny, keeplenx,
diff --git a/src/lib/panelreel.c b/src/lib/panelreel.c
index eab85025f..75049c19a 100644
--- a/src/lib/panelreel.c
+++ b/src/lib/panelreel.c
@@ -52,6 +52,8 @@ window_coordinates(const ncplane* w, int* begy, int* begx, int* leny, int* lenx)
 
 // FIXME compatability wrapper for libpanel
 int wresize(ncplane* n, int leny, int lenx){
+assert(leny > 0);
+assert(lenx > 0);
   int dimy, dimx;
   ncplane_dim_yx(n, &dimy, &dimx);
   int keepy = dimy > leny ? leny : dimy;