diff --git a/core/generic/generic-tests.factor b/core/generic/generic-tests.factor
index f5c2018e60..5a98173a89 100755
--- a/core/generic/generic-tests.factor
+++ b/core/generic/generic-tests.factor
@@ -3,7 +3,8 @@ classes.tuple classes.union compiler.units continuations
 definitions eval generic generic.math generic.standard
 hashtables io io.streams.string kernel layouts math math.order
 namespaces parser prettyprint quotations sequences sorting
-strings tools.test vectors words generic.single ;
+strings tools.test vectors words generic.single
+compiler.crossref ;
 IN: generic.tests
 
 GENERIC: foobar ( x -- y )
diff --git a/core/words/words-tests.factor b/core/words/words-tests.factor
index b9d6e80630..fec9c14830 100755
--- a/core/words/words-tests.factor
+++ b/core/words/words-tests.factor
@@ -1,7 +1,7 @@
 USING: arrays generic assocs kernel math namespaces
 sequences tools.test words definitions parser quotations
 vocabs continuations classes.tuple compiler.units
-io.streams.string accessors eval words.symbol ;
+io.streams.string accessors eval words.symbol grouping ;
 IN: words.tests
 
 [ 4 ] [
@@ -121,7 +121,7 @@ DEFER: x
 [ { } ]
 [
     all-words [
-        "compiled-uses" word-prop
+        "compiled-uses" word-prop 2 <groups>
         keys [ "forgotten" word-prop ] filter
     ] map harvest
 ] unit-test
diff --git a/vm/contexts.cpp b/vm/contexts.cpp
index 16b882f2cc..f5fac1119e 100644
--- a/vm/contexts.cpp
+++ b/vm/contexts.cpp
@@ -3,6 +3,20 @@
 namespace factor
 {
 
+context::context(cell ds_size, cell rs_size) :
+	callstack_top(NULL),
+	callstack_bottom(NULL),
+	datastack(0),
+	retainstack(0),
+	datastack_save(0),
+	retainstack_save(0),
+	magic_frame(NULL),
+	datastack_region(new segment(ds_size,false)),
+	retainstack_region(new segment(rs_size,false)),
+	catchstack_save(0),
+	current_callback_save(0),
+	next(NULL) {}
+
 void factor_vm::reset_datastack()
 {
 	ds = ds_bot - sizeof(cell);
@@ -42,11 +56,7 @@ context *factor_vm::alloc_context()
 		unused_contexts = unused_contexts->next;
 	}
 	else
-	{
-		new_context = new context;
-		new_context->datastack_region = new segment(ds_size,false);
-		new_context->retainstack_region = new segment(rs_size,false);
-	}
+		new_context = new context(ds_size,rs_size);
 
 	return new_context;
 }
diff --git a/vm/contexts.hpp b/vm/contexts.hpp
index aa6f9ec8ce..ddbae5de78 100644
--- a/vm/contexts.hpp
+++ b/vm/contexts.hpp
@@ -46,6 +46,8 @@ struct context {
 	cell current_callback_save;
 
 	context *next;
+
+	context(cell ds_size, cell rs_size);
 };
 
 #define ds_bot (ctx->datastack_region->start)