Merge pull request #883 from masamitsu-murase/modify_node_rescue_handling

Adjust stack position of NODE_RESCUE.

src/codegen.c

@@ -1083,6 +1083,7 @@ codegen(codegen_scope *s, node *tree, int val)
           }
           if (n3->cdr->cdr->car) {
             codegen(s, n3->cdr->cdr->car, val);
+            if (val) pop();
           }
           tmp = new_label(s);
           genop(s, MKOP_sBx(OP_JMP, exend));
@@ -1102,6 +1103,9 @@ codegen(codegen_scope *s, node *tree, int val)
       if (tree->car) {
         codegen(s, tree->car, val);
       }
+      else if (val) {
+        push();
+      }
       dispatch_linked(s, exend);
       loop_pop(s, NOVAL);
     }

test/t/exception.rb

@@ -287,6 +287,34 @@ assert('Exception 16') do
   end
 end
 
+assert('Exception 17') do
+  begin
+    raise "a"  # StandardError
+  rescue ArgumentError
+    1
+  rescue StandardError
+    2
+  else
+    3
+  ensure
+    4
+  end == 2
+end
+
+assert('Exception 18') do
+  begin
+    0
+  rescue ArgumentError
+    1
+  rescue StandardError
+    2
+  else
+    3
+  ensure
+    4
+  end == 3
+end
+
 assert('Exception#inspect without message') do
   Exception.new.inspect
 end