Correct false positive check in `check_unique_package_names`

src/checker.cpp

@@ -5307,12 +5307,18 @@ void check_unique_package_names(Checker *c) {
 			string_map_set(&pkgs, key, pkg);
 			continue;
 		}
+		auto *this = pkg->files[0]->pkg_decl;
+		auto *other = (*found)->files[0]->pkg_decl;
+		if (this == other) {
+			// NOTE(bill): A false positive was found, ignore it
+			continue;
+		}
 
-		error(pkg->files[0]->pkg_decl, "Duplicate declaration of 'package %.*s'", LIT(name));
+		error(this, "Duplicate declaration of 'package %.*s'", LIT(name));
 		error_line("\tA package name must be unique\n"
 		           "\tThere is no relation between a package name and the directory that contains it, so they can be completely different\n"
 		           "\tA package name is required for link name prefixing to have a consistent ABI\n");
-		error((*found)->files[0]->pkg_decl, "found at previous location");
+		error(other, "found at previous location");
 	}
 }
 

src/parser.cpp

@@ -183,6 +183,11 @@ Ast *clone_ast(Ast *node) {
 		n->FieldValue.value = clone_ast(n->FieldValue.value);
 		break;
 
+	case Ast_EnumFieldValue:
+		n->EnumFieldValue.name = clone_ast(n->EnumFieldValue.name);
+		n->EnumFieldValue.value = clone_ast(n->EnumFieldValue.value);
+		break;
+
 	case Ast_TernaryIfExpr:
 		n->TernaryIfExpr.x    = clone_ast(n->TernaryIfExpr.x);
 		n->TernaryIfExpr.cond = clone_ast(n->TernaryIfExpr.cond);

src/parser_pos.cpp

@@ -39,6 +39,7 @@ Token ast_token(Ast *node) {
 	case Ast_SliceExpr:          return node->SliceExpr.open;
 	case Ast_Ellipsis:           return node->Ellipsis.token;
 	case Ast_FieldValue:         return node->FieldValue.eq;
+	case Ast_EnumFieldValue:     return ast_token(node->EnumFieldValue.name);
 	case Ast_DerefExpr:          return node->DerefExpr.op;
 	case Ast_TernaryIfExpr:      return ast_token(node->TernaryIfExpr.x);
 	case Ast_TernaryWhenExpr:    return ast_token(node->TernaryWhenExpr.x);
@@ -178,6 +179,11 @@ Token ast_end_token(Ast *node) {
 		}
 		return node->Ellipsis.token;
 	case Ast_FieldValue:         return ast_end_token(node->FieldValue.value);
+	case Ast_EnumFieldValue:
+		if (node->EnumFieldValue.value) {
+			return ast_end_token(node->EnumFieldValue.value);
+		}
+		return ast_end_token(node->EnumFieldValue.name);
 	case Ast_DerefExpr:          return node->DerefExpr.op;
 	case Ast_TernaryIfExpr:      return ast_end_token(node->TernaryIfExpr.y);
 	case Ast_TernaryWhenExpr:    return ast_end_token(node->TernaryWhenExpr.y);