Fix memory corruption with FFI backend

ankane · ankane · commit 07a606f01c62 · 2025-04-20T18:46:39.000-07:00
diff --git a/lib/fiddle/ffi_backend.rb b/lib/fiddle/ffi_backend.rb
@@ -239,7 +239,7 @@ def self.from_native(value, ctx)
 
     def self.to_ptr(value)
       if value.is_a?(String)
-        cptr = Pointer.malloc(value.bytesize)
+        cptr = Pointer.malloc(value.bytesize + 1)
         cptr.ffi_ptr.put_string(0, value)
         cptr
 
