The following test failed in the JDK20 CI:

compiler/compilercontrol/mixed/RandomValidCommandsTest.java

Here's a snippet from the log file:

Checking expected compilation state: {
  method: public static java.lang.String compiler.compilercontrol.share.pool.sub.KlassDup.smethod()
  compile [Optional[false], Optional[false]]
  force_inline [Optional[false], Optional[false]]
  dont_inline [Optional[true], Optional[true]]
  log Optional.empty
  print_assembly Optional[true]
  print_inline Optional.empty
}
WB error: failed to blocking compile at level 4 method compiler.compilercontrol.share.pool.sub.KlassDup::smethod
Checking expected compilation state: {
  method: public static java.lang.String compiler.compilercontrol.share.pool.sub.KlassDup.smethod(int,int[])
  compile [Optional[false], Optional[false]]
  force_inline [Optional[false], Optional[false]]
  dont_inline [Optional[true], Optional[true]]
  log Optional.empty
  print_assembly Optional[true]
  print_inline Optional.empty
}
WB error: failed to blocking compile at level 4 method compiler.compilercontrol.share.pool.sub.KlassDup::smethod
Checking expected compilation state: {
  method: public static java.lang.Integer compiler.compilercontrol.share.pool.sub.KlassDup.smethod(java.lang.Integer)
  compile [Optional[false], Optional[false]]
  force_inline [Optional[false], Optional[false]]
  dont_inline [Optional[true], Optional[true]]
  log Optional.empty
  print_assembly Optional[true]
  print_inline Optional.empty
}
WB error: failed to blocking compile at level 4 method compiler.compilercontrol.share.pool.sub.KlassDup::smethod
Checking expected compilation state: {
  method: public void compiler.compilercontrol.share.pool.subpack.Klass.method(int,java.lang.String[],java.lang.Integer,byte[],double[][])
  compile [Optional[false], Optional[false]]
  force_inline [Optional[false], Optional[false]]
  dont_inline [Optional[true], Optional[true]]
  log Optional.empty
  print_assembly Optional.empty
  print_inline Optional.empty
}
];
 stderr: [Java HotSpot(TM) 64-Bit Server VM warning: c1: printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output
Java HotSpot(TM) 64-Bit Server VM warning: c2: printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output
Java HotSpot(TM) 64-Bit Server VM warning: c1: printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output
Java HotSpot(TM) 64-Bit Server VM warning: c2: printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output
Java HotSpot(TM) 64-Bit Server VM warning: c1: printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output
Java HotSpot(TM) 64-Bit Server VM warning: c2: printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output
Java HotSpot(TM) 64-Bit Server VM warning: c1: printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output
Java HotSpot(TM) 64-Bit Server VM warning: c2: printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output
Exception in thread "main" java.lang.RuntimeException: FAILED: method public void compiler.compilercontrol.share.pool.subpack.Klass.method(int,java.lang.String[],java.lang.Integer,byte[],double[][]) compilable: true, but should: false on required level: 4: expected true to equal false
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertEquals(Asserts.java:205)
at jdk.test.lib.Asserts.assertEQ(Asserts.java:178)
at compiler.compilercontrol.share.actions.CompileAction.checkCompilation(CompileAction.java:90)
at compiler.compilercontrol.share.actions.CompileAction.checkCompiled(CompileAction.java:74)
at compiler.compilercontrol.share.actions.BaseAction.lambda$check$2(BaseAction.java:141)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at compiler.compilercontrol.share.actions.BaseAction.check(BaseAction.java:139)
at compiler.compilercontrol.share.actions.BaseAction.communicate(BaseAction.java:100)
at compiler.compilercontrol.share.actions.BaseAction.main(BaseAction.java:59)
]
 exitValue = 1

java.lang.RuntimeException: Expected to get exit value of [0], exit value is: [1]
at jdk.test.lib.process.OutputAnalyzer.shouldHaveExitValue(OutputAnalyzer.java:490)
at compiler.compilercontrol.share.scenario.Scenario.execute(Scenario.java:118)
at compiler.compilercontrol.share.MultiCommand.test(MultiCommand.java:103)
at compiler.compilercontrol.mixed.RandomValidCommandsTest.main(RandomValidCommandsTest.java:43)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:312)
at java.base/java.lang.Thread.run(Thread.java:1591)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test

result: Error. Agent error: java.lang.Exception: Agent 11 timed out with a timeout of 2400 seconds; check console log for any additional details