Log error when variable is unknown type.

src/Binder/Binder.cpp

@@ -1,10 +1,11 @@
 #include "Binder.hpp"
 #include "../CoreData/PrimitiveTypes.hpp"
-#include "../Diagnostics/Logger.hpp"
 using namespace MalachScript::Parser;
 using namespace MalachScript::Diagnostics;
 
 namespace MalachScript::Binder {
+    static const BoundType* UnknownType = new BoundType("???"_id, ClassAttr::None, 0);
+
     void Binder::Bind(BoundNamespace* ns, const std::vector<const MalachScript::Parser::ParsedStatement*>& statements,
                       const Binder::log_func& log) {
         for (const auto* s : statements) {
@@ -195,7 +196,9 @@ namespace MalachScript::Binder {
                 // FIXME: Resolve namespace of scoped identifier
                 auto type = ResolveType(ns, typeStatement->GetScopedIdentifier().GetIdentifier());
                 if (!type.has_value()) {
-                    throw std::logic_error("Shouldn't be reached");
+                    log(DiagnosticLevel::Error, DiagnosticType::UnknownType, typeStatement->GetSpan(),
+                        {typeStatement->GetScopedIdentifier().GetIdentifier().GetStdString()});
+                    type = UnknownType;
                 }
                 if (activeType.has_value()) {
                     activeType.value()->AddField(var->GetIdentifier(),