From a9b36b4ec44bd31b5fd184a1ff5c17b8e7b4c84f Mon Sep 17 00:00:00 2001
From: Shahram Najm <masn@ecmwf.int>
Date: Mon, 9 May 2022 15:44:47 +0100
Subject: [PATCH] Simple packing: corner case of bpv>0 for a constant field

---
 src/grib_accessor_class_data_simple_packing.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/grib_accessor_class_data_simple_packing.c b/src/grib_accessor_class_data_simple_packing.c
index 0c36c26c5..5811451ae 100644
--- a/src/grib_accessor_class_data_simple_packing.c
+++ b/src/grib_accessor_class_data_simple_packing.c
@@ -400,6 +400,15 @@ static int _unpack_double(grib_accessor* a, double* val, size_t* len, unsigned c
                 return GRIB_DECODING_ERROR;
             }
         }
+#if 0
+        if (offsetBeforeData == offsetAfterData) {
+            /* Crazy case: Constant field with bitsPerValue > 0 */
+            for (i = 0; i < n_vals; i++)
+                val[i] = reference_value;
+            *len = n_vals;
+            return GRIB_SUCCESS;
+        }
+#endif
     }
 
     grib_context_log(a->context, GRIB_LOG_DEBUG,