leak: in tests, when correct message_type doesn't exist, arguments should not leak

src/kernel/build.c

@@ -627,19 +627,27 @@ message *msg_materials_required(unit * u, order * ord,
     const construction * ctype, int multi)
 {
     int c;
+    message *msg;
     /* something missing from the list of materials */
     resource *reslist = NULL;
 
     if (multi <= 0 || multi == INT_MAX)
         multi = 1;
     for (c = 0; ctype && ctype->materials[c].number; ++c) {
+        // TODO: lots of alloc/dealloc calls here (make var_copy_resources take an array)
         resource *res = malloc(sizeof(resource));
         res->number = multi * ctype->materials[c].number / ctype->reqsize;
         res->type = ctype->materials[c].rtype;
         res->next = reslist;
         reslist = res;
     }
-    return msg_feedback(u, ord, "build_required", "required", reslist);
+    msg = msg_feedback(u, ord, "build_required", "required", reslist);
+    while (reslist) {
+        resource *res = reslist->next;
+        free(reslist);
+        reslist = res;
+    }
+    return msg;
 }
 
 int maxbuild(const unit * u, const construction * cons)

src/reports.c

@@ -1733,6 +1733,23 @@ static variant var_copy_items(variant x)
     return x;
 }
 
+static variant var_copy_resources(variant x)
+{
+    resource *rsrc;
+    resource *rdst = NULL, **rptr = &rdst;
+
+    for (rsrc = (resource *)x.v; rsrc != NULL; rsrc = rsrc->next) {
+        resource *res = malloc(sizeof(resource));
+        res->number = rsrc->number;
+        res->type = rsrc->type;
+        *rptr = res;
+        rptr = &res->next;
+    }
+    *rptr = NULL;
+    x.v = rdst;
+    return x;
+}
+
 static void var_free_resources(variant x)
 {
     resource *rsrc = (resource *)x.v;
@@ -2295,7 +2312,7 @@ void register_reports(void)
     register_argtype("int", NULL, NULL, VAR_INT);
     register_argtype("string", var_free_string, var_copy_string, VAR_VOIDPTR);
     register_argtype("order", var_free_order, var_copy_order, VAR_VOIDPTR);
-    register_argtype("resources", var_free_resources, NULL, VAR_VOIDPTR);
+    register_argtype("resources", var_free_resources, var_copy_resources, VAR_VOIDPTR);
     register_argtype("items", var_free_resources, var_copy_items, VAR_VOIDPTR);
     register_argtype("regions", var_free_regions, NULL, VAR_VOIDPTR);