diff --git a/src/share/vm/code/dependencies.cpp b/src/share/vm/code/dependencies.cpp
index 75d0546642ecd4a9e96ce60482fd8e90250b9ae8..8d9d70d4207d74ba1e233ed231b969ef24701370 100644
--- a/src/share/vm/code/dependencies.cpp
+++ b/src/share/vm/code/dependencies.cpp
@@ -1491,9 +1491,12 @@ bool DepChange::ContextStream::next() {
     // fall through:
     _change_type = Change_new_sub;
   case Change_new_sub:
-    _klass = instanceKlass::cast(_klass)->super();
-    if (_klass != NULL) {
-      return true;
+    // 6598190: brackets workaround Sun Studio C++ compiler bug 6629277
+    {
+      _klass = instanceKlass::cast(_klass)->super();
+      if (_klass != NULL) {
+        return true;
+      }
     }
     // else set up _ti_limit and fall through:
     _ti_limit = (_ti_base == NULL) ? 0 : _ti_base->length();