Skip suggestions for pre-defined values if none assigned

CMakeLists.txt

@@ -136,7 +136,7 @@ set(META_APP_URL "https://github.com/${META_APP_AUTHOR}/${META_PROJECT_NAME}")
 set(META_APP_DESCRIPTION "Useful C++ classes and routines such as argument parser, IO and conversion utilities")
 set(META_VERSION_MAJOR 4)
 set(META_VERSION_MINOR 14)
-set(META_VERSION_PATCH 0)
+set(META_VERSION_PATCH 1)
 
 # find required 3rd party libraries
 include(3rdParty)

application/argumentparser.cpp

@@ -1227,6 +1227,9 @@ string ArgumentParser::findSuggestions(int argc, const char *const *argv, unsign
     }
     // -> consider relevant values
     for (const Argument *const arg : completionInfo.relevantPreDefinedValues) {
+        if (!arg->preDefinedCompletionValues()) {
+            continue;
+        }
         for (const char *i = arg->preDefinedCompletionValues(); *i; ++i) {
             const char *const wordStart(i);
             const char *wordEnd(wordStart + 1);