codegen: Don't pad union fields.

Fixes #553

1 files changed, 5 insertions, 3 deletions

diff --git a/src/codegen/mod.rs b/src/codegen/mod.rs
index 120acefa..fb07eaf8 100644
--- a/src/codegen/mod.rs
+++ b/src/codegen/mod.rs
@@ -1136,9 +1136,11 @@ impl CodeGenerator for CompInfo {
                 }
             };
 
-            if let Some(padding_field) =
-                struct_layout.pad_field(&field_name, field_ty, field.offset()) {
-                fields.push(padding_field);
+            if !is_union {
+                if let Some(padding_field) =
+                    struct_layout.pad_field(&field_name, field_ty, field.offset()) {
+                    fields.push(padding_field);
+                }
             }
 
             let is_private = field.annotations()