# HG changeset patch
# User thartmann
# Date 1495437452 -7200
# Node ID 241128a2c3ce389099b38028ffea18b5812d8f3f
# Parent  cef572e3f5a6ac202a6813d81ede60c21ca2c16c
8180511: Null pointer dereference in Matcher::ReduceInst()
Summary: Fixed a missing null check on the return value of MachNodeGenerator() found by Parfait.
Reviewed-by: kvn

diff -r cef572e3f5a6 -r 241128a2c3ce src/share/vm/opto/matcher.cpp
--- a/src/share/vm/opto/matcher.cpp	Mon May 22 09:16:46 2017 +0200
+++ b/src/share/vm/opto/matcher.cpp	Mon May 22 09:17:32 2017 +0200
@@ -1657,6 +1657,7 @@
 
   // Build the object to represent this state & prepare for recursive calls
   MachNode *mach = s->MachNodeGenerator( rule, C );
+  guarantee(mach != NULL, "Missing MachNode");
   mach->_opnds[0] = s->MachOperGenerator( _reduceOp[rule], C );
   assert( mach->_opnds[0] != NULL, "Missing result operand" );
   Node *leaf = s->_leaf;