[8u] RFF:8256671: Incorrect assignment operator used in guarantee() in genCollectedHeap

[linzang(臧琳)]

Dear All, 
     May I ask your help to review this 1 line change in genCollectedHeap.cpp? 
     Bug: https://bugs.openjdk.java.net/browse/JDK-8256671
     Webrev: http://cr.openjdk.java.net/~lzang/8256671/
     
The diff: 
--- old/src/share/vm/memory/genCollectedHeap.cpp	2020-11-19 22:59:45.332013050 +0800
+++ new/src/share/vm/memory/genCollectedHeap.cpp	2020-11-19 22:59:45.268013049 +0800
@@ -1181,7 +1181,7 @@
 
 
 void GenCollectedHeap::prepare_for_compaction() {
-  guarantee(_n_gens = 2, "Wrong number of generations");
+  guarantee(_n_gens == 2, "Wrong number of generations");
   Generation* old_gen = _gens[1];
   // Start by compacting into same gen.
   CompactPoint cp(old_gen);


Thanks!
Lin