Problem Statement
  =================
  If an out of range value was used with -XX:G1ConfidencePercent=N, e.g. 200,
  JVM may crash with following guarantee. G1ConfidencePercent value should be
  validated before starting VM.
  
  # Internal Error (numberSeq.cpp:184), pid=7292, tid=2067221360
  # guarantee(variance() > -1.0) failed: variance should be >= 0
  
  Issue Clarification
  ===================
  Crash
    If an out of range value was used with -XX:G1ConfidencePercent=N, e.g.
  200, JVM may crash with following guarantee.
  # Internal Error (numberSeq.cpp:184), pid=7292, tid=2067221360
  # guarantee(variance() > -1.0) failed: variance should be >= 0
  
  How often have you seen the problem?
    Almost always with -XX:G1ConfidencePercent=200
  How reproducable is the problem?
    Run a java program which keeps allocating memory with following options.
    -XX:+UseG1GC -XX:G1ConfidencePercent=200
  
  system configuration
  ====================
  Full output from java -version
  java version "1.7.0_07"
  Java(TM) SE Runtime Environment (build 1.7.0_07-b10)
  Java HotSpot(TM) Server VM (build 23.3-b01, mixed mode)