The method of Filechanely.map() would cause the JVM crash

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Hi, all
When using OpenJDK 1.8 8u92, we found that the method of Filechanely.map() would cause the JVM crash.
And then we found a solution in :https://bugs.openjdk.java.net/browse/JDK-8168628.
To verify the correctness of the solution,we had some tests besed in OpenJDK8 8u202.Unfortunately, 
the problem was not well solved,the JVM crash still happened(Attachment1.rar).And then,
we tested it again in OpenJDK11,the JVM crash still happened too,this is the crash log:Attachment2.rar.
So,the solution in: https://bugs.openjdk.java.net/browse/JDK-8168628
and related can not solve this problem thoroughly until now.
Here is the test case we provided:crash-demo.rar

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