1 files changed, 6 insertions, 1 deletions

diff --git a/src/pruning.c b/src/pruning.c
index 6165e71..11705c5 100644
--- a/src/pruning.c
+++ b/src/pruning.c
@@ -338,8 +338,13 @@ ptableval(PruneData *pd, Cube cube)
 static int
 ptableval_index(PruneData *pd, uint64_t ind)
 {
-        if (!pd->generated)
+        if (!pd->generated) {
+                fprintf(stderr, "Warning: request pruning table value"
+                        " for uninitialized table %s.\n It's fine, but it"
+                        " should not happen. Please report bug.\n",
+                        pd->filename);
                 genptable(pd);
+        }
 
         return (ind % 2) ? pd->ptable[ind/2] / 16 : pd->ptable[ind/2] % 16;
 }