diff --git a/.gitignore b/.gitignore
index 57d60653..ce195c89 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,3 +33,4 @@ main.dSYM/
 docs/references.md
 
 .xmake
+.vs
diff --git a/include/pocketpy/objects/sourcedata.hpp b/include/pocketpy/objects/sourcedata.hpp
index 96b716f9..141ef54f 100644
--- a/include/pocketpy/objects/sourcedata.hpp
+++ b/include/pocketpy/objects/sourcedata.hpp
@@ -70,7 +70,7 @@ struct SourceData {
     }
 
     Str snapshot(int lineno, const char* cursor, std::string_view name) const {
-        return pkpy_SourceData__snapshot(self, lineno, cursor, name.data());
+        return pkpy_SourceData__snapshot(self, lineno, cursor, name.empty() ? nullptr : name.data());
     }
 
     ~SourceData() {