--- src/ResMgr.cc.orig	2019-08-23 23:08:17.000000000 +0200
+++ src/ResMgr.cc	2020-01-14 17:32:33.475771000 +0100
@@ -86,6 +86,9 @@ const char *ResType::FindVar(const char *name,const Re
    const ResType *exact_name=0;
    int sub=0;
 
+   if(!types_by_name)
+      types_by_name=new xmap<ResType*>;
+
    *type=types_by_name->lookup(name);
    if(*type)
       goto found; // exact match
@@ -266,6 +269,10 @@ static int RefResourceCompare(const Ref<Resource> *a,c
 char *ResType::Format(bool with_defaults,bool only_defaults)
 {
    RefArray<Resource> created;
+
+   if(!types_by_name)
+      types_by_name=new xmap<ResType*>;
+
    if(with_defaults || only_defaults)
    {
       for(ResType *dscan=types_by_name->each_begin(); dscan; dscan=types_by_name->each_next())
@@ -301,6 +308,9 @@ char *ResType::Format(bool with_defaults,bool only_def
 char **ResType::Generator(void)
 {
    StringSet res;
+
+   if(!types_by_name)
+      types_by_name=new xmap<ResType*>;
 
    for(ResType *dscan=types_by_name->each_begin(); dscan; dscan=types_by_name->each_next())
       if(!dscan->IsAlias())