diff --git a/gcc/testsuite/g++.target/aarch64/sve/pr96974.C b/gcc/testsuite/g++.target/aarch64/sve/pr96974.C
new file mode 100644
index 00000000000..363241d18df
--- /dev/null
+++ b/gcc/testsuite/g++.target/aarch64/sve/pr96974.C
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-Ofast -march=armv8.2-a+sve -fdisable-tree-fre4 -fdump-tree-slp-details" } */
+
+float a;
+int
+b ()
+{ return __builtin_lrintf(a); }
+
+struct c {
+  float d;
+    c() {
+      for (int e = 0; e < 9; e++)
+	coeffs[e] = d ? b() : 0;
+    }
+    int coeffs[10];
+} f;
+
+/* { dg-final { scan-tree-dump "Not vectorized: Incompatible number of vector subparts between" "slp1" } } */
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index d791d3a4720..4c01e82ff39 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -12148,8 +12148,12 @@ vect_get_vector_types_for_stmt (vec_info *vinfo, stmt_vec_info stmt_info,
 	}
     }
 
-  gcc_assert (multiple_p (TYPE_VECTOR_SUBPARTS (nunits_vectype),
-			  TYPE_VECTOR_SUBPARTS (*stmt_vectype_out)));
+  if (!multiple_p (TYPE_VECTOR_SUBPARTS (nunits_vectype),
+		   TYPE_VECTOR_SUBPARTS (*stmt_vectype_out)))
+    return opt_result::failure_at (stmt,
+				   "Not vectorized: Incompatible number "
+				   "of vector subparts between %T and %T\n",
+				   nunits_vectype, *stmt_vectype_out);
 
   if (dump_enabled_p ())
     {