Better error message from System::read_serialized_vectors()

jwpeterson · jwpeterson · commit c3afee942b5d · 2025-03-21T11:14:02.000-05:00
diff --git a/src/systems/system_io.C b/src/systems/system_io.C
@@ -2191,7 +2191,9 @@ std::size_t System::read_serialized_vectors (Xdr & io,
       // Get the buffer size
       io.data(vector_length);
 
-      libmesh_error_msg_if (num_vecs != vectors.size(), "Unexpected value of num_vecs");
+      libmesh_error_msg_if
+        (num_vecs != vectors.size(),
+         "Xdr file header declares " << num_vecs << " vectors, but we were asked to read " << vectors.size());
 
       if (num_vecs != 0)
         {

Original file line number	Diff line number	Diff line change
`@@ -2191,7 +2191,9 @@ std::size_t System::read_serialized_vectors (Xdr & io,`
`2191`	`2191`	`// Get the buffer size`
`2192`	`2192`	`io.data(vector_length);`
`2193`	`2193`
`2194`		`- libmesh_error_msg_if (num_vecs != vectors.size(), "Unexpected value of num_vecs");`
	`2194`	`+ libmesh_error_msg_if`
	`2195`	`+ (num_vecs != vectors.size(),`
	`2196`	`+ "Xdr file header declares " << num_vecs << " vectors, but we were asked to read " << vectors.size());`
`2195`	`2197`
`2196`	`2198`	`if (num_vecs != 0)`
`2197`	`2199`	`{`