JDK-7169062 : CMS: Assertion failed with -XX:+ObjectAlignmentInBytes=64
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Running a simple Hello world with a System.gc() crashes CMS:
java -XX:+UseConcMarkSweepGC -XX:ObjectAlignmentInBytes=64 -cp ~/src/ Hello
The crash is instantaneous and reproduces every time. All other GCs works with 64 bytes alignment.