Ainur: Warn if a label is overwritten

src/Ainur/AinurState1.cpp

@@ -180,6 +180,10 @@ void AinurState::assign(String k, String v)
 		err(errLabel(ERR_PARSE_UNDECLARED, k));
 
 	assert(static_cast<SizeType>(x) < values_.size());
+
+	if (values_[x] != "")
+		std::cerr<<"Overwriting label "<<k<<" with "<<v<<"\n";
+
 	values_[x] = v;
 }
 

src/Ainur/test.cpp

@@ -12,6 +12,10 @@ void partiallyReadSomething(const PsimagLite::Ainur& ainur)
 	//std::vector<double> v;
 	ainur.readValue(v, "myv");
 	std::cout<<v;
+
+	PsimagLite::String m;
+	ainur.readValue(m, "Model");
+	std::cout<<m<<"\n";
 }
 
 int main(int argc, char** argv)