Print newline after rethrow instruction (#1503)

2 files changed, 24 insertions, 1 deletions

diff --git a/src/wat-writer.cc b/src/wat-writer.cc
index 81d379d1..837f109e 100644
--- a/src/wat-writer.cc
+++ b/src/wat-writer.cc
@@ -904,7 +904,7 @@ Result WatWriter::ExprVisitorDelegate::OnThrowExpr(ThrowExpr* expr) {
 }
 
 Result WatWriter::ExprVisitorDelegate::OnRethrowExpr(RethrowExpr* expr) {
-  writer_->WritePutsSpace(Opcode::Rethrow_Opcode.GetName());
+  writer_->WritePutsNewline(Opcode::Rethrow_Opcode.GetName());
   return Result::Ok;
 }
 
diff --git a/test/roundtrip/rethrow.txt b/test/roundtrip/rethrow.txt
new file mode 100644
index 00000000..84a7a93e
--- /dev/null
+++ b/test/roundtrip/rethrow.txt
@@ -0,0 +1,23 @@
+;;; TOOL: run-roundtrip
+;;; ARGS: --stdout --enable-exceptions
+(module
+  (event $e0 (param i32))
+
+  (func
+    try
+    catch
+      rethrow
+    end
+  )
+)
+(;; STDOUT ;;;
+(module
+  (type (;0;) (func (param i32)))
+  (type (;1;) (func))
+  (func (;0;) (type 1)
+    try  ;; label = @1
+    catch
+      rethrow
+    end)
+  (event (;0;) (type 0) (param i32)))
+;;; STDOUT ;;)