1 files changed, 34 insertions, 0 deletions
diff --git a/test/lit/empty-elem.wast b/test/lit/empty-elem.wast
new file mode 100644
index 000000000..0eff01d3c
--- /dev/null
+++ b/test/lit/empty-elem.wast
@@ -0,0 +1,34 @@
+;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
+;; RUN: wasm-opt %s -all --roundtrip -S -o - | filecheck %s
+
+;; Regression test for a bug where empty passive segments were incorrectly
+;; printed and emitted as though they had func type even if they had a different
+;; type, resulting in invalid modules.
+
+(module
+ ;; CHECK:      (type $struct (sub (struct )))
+ (type $struct (sub (struct)))
+
+ ;; CHECK:      (type $array (sub (array (mut (ref null $struct)))))
+ (type $array (sub (array (mut (ref null $struct)))))
+
+ ;; CHECK:      (elem $e (ref null $struct))
+ (elem $e (ref null $struct))
+
+ ;; CHECK:      (func $array-init-elem (type $2)
+ ;; CHECK-NEXT:  (array.init_elem $array $e
+ ;; CHECK-NEXT:   (array.new_fixed $array 0)
+ ;; CHECK-NEXT:   (i32.const 0)
+ ;; CHECK-NEXT:   (i32.const 0)
+ ;; CHECK-NEXT:   (i32.const 0)
+ ;; CHECK-NEXT:  )
+ ;; CHECK-NEXT: )
+ (func $array-init-elem
+  (array.init_elem $array $e
+   (array.new_fixed $array 0)
+   (i32.const 0)
+   (i32.const 0)
+   (i32.const 0)
+  )
+ )
+)