The following test failed in the JDK26 CI:

testlibrary_tests/ir_framework/tests/TestScenariosCrossProduct.java

Here's a snippet from the log file:

#section:driver
----------messages:(11/400)----------
command: driver ir_framework.tests.TestScenariosCrossProduct
reason: User specified action: run driver ir_framework.tests.TestScenariosCrossProduct
started: Sat Oct 04 04:43:38 UTC 2025
Mode: agentvm
Agent id: 14
Process id: 12800
Timeout signalled after 120 seconds
Timeout information:
--- Timeout information end.
finished: Sat Oct 04 04:50:58 UTC 2025
elapsed time (seconds): 440.255
----------configuration:(17/1947)*----------

<snip>

Here are stderr snippets for the first three failed scenarios:

----------System.err:(581/79058)*----------
The following scenarios have failed: #0, #1, #2

Scenario #0
===========
Scenario flags: [-XX:TLABRefillWasteFraction=64]

Command Line:
c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\windows-x64-debug.jdk\\jdk-26\\fastdebug\\bin\\java.exe -DReproduce=true -cp C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\src.full\\open\\test\\hotspot\\jtreg\\testlibrary_tests\\ir_framework\\tests;C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d\\test\\lib;C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d\\testlibrary_tests;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\jtreg.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\junit-platform-console-standalone-1.13.3.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\testng-7.3.0.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\jcommander-1.82.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\guice-5.1.0.jar -Djava.library.path=c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\windows-x64-debug.test\\hotspot\\jtreg\\native -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:MaxRAMPercentage=4.16667 -Dtest.boot.jdk=c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk\\24\\36\\bundles\\windows-x64\\jdk-24_windows-x64_bin.zip\\jdk-24 -Djava.io.tmpdir=c:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\tmp -XX:+CreateCoredumpOnCrash -Dir.framework.server.port=60721 -XX:TLABRefillWasteFraction=64 -XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -XX:+LogCompilation -XX:CompilerDirectivesFile=test-vm-compile-commands-pid-11416.log -XX:CompilerDirectivesLimit=41 -XX:-OmitStackTraceInFastThrow -DShouldDoIRVerification=true -XX:-BackgroundCompilation -XX:CompileCommand=quiet compiler.lib.ir_framework.test.TestVM ir_framework.tests.TestScenariosCrossProduct

One or more @IR rules failed:

Failed IR Rules (1) of Methods (1)
----------------------------------
1) Method "public void ir_framework.tests.TestScenariosCrossProduct.failDefault()" - [Failed IR rules: 1]:
   * @IR rule 1: "@compiler.lib.ir_framework.IR(phase={DEFAULT}, applyIfPlatformAnd={}, applyIfCPUFeatureOr={}, counts={"_#CALL#_", "1"}, applyIfPlatform={}, failOn={}, applyIfPlatformOr={}, applyIfOr={}, applyIfCPUFeatureAnd={}, applyIf={"TLABRefillWasteFraction", "64"}, applyIfCPUFeature={}, applyIfAnd={}, applyIfNot={})"
     > Phase "PrintIdeal":
       - counts: Graph contains wrong number of nodes:
         * Constraint 1: "(\\d+(\\s){2}(Call.*Java.*)+(\\s){2}===.*)"
           - Failed comparison: [found] 0 = 1 [given]
           - No nodes matched!

>>> Check stdout for compilation output of the failed methods


Scenario #1
===========
Scenario flags: [-XX:TLABRefillWasteFraction=53]

Command Line:
c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\windows-x64-debug.jdk\\jdk-26\\fastdebug\\bin\\java.exe -DReproduce=true -cp C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\src.full\\open\\test\\hotspot\\jtreg\\testlibrary_tests\\ir_framework\\tests;C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d\\test\\lib;C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d\\testlibrary_tests;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\jtreg.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\junit-platform-console-standalone-1.13.3.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\testng-7.3.0.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\jcommander-1.82.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\guice-5.1.0.jar -Djava.library.path=c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\windows-x64-debug.test\\hotspot\\jtreg\\native -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:MaxRAMPercentage=4.16667 -Dtest.boot.jdk=c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk\\24\\36\\bundles\\windows-x64\\jdk-24_windows-x64_bin.zip\\jdk-24 -Djava.io.tmpdir=c:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\tmp -XX:+CreateCoredumpOnCrash -Dir.framework.server.port=60736 -XX:TLABRefillWasteFraction=53 -XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -XX:+LogCompilation -XX:CompilerDirectivesFile=test-vm-compile-commands-pid-36696.log -XX:CompilerDirectivesLimit=41 -XX:-OmitStackTraceInFastThrow -DShouldDoIRVerification=true -XX:-BackgroundCompilation -XX:CompileCommand=quiet compiler.lib.ir_framework.test.TestVM ir_framework.tests.TestScenariosCrossProduct

One or more @IR rules failed:

Failed IR Rules (1) of Methods (1)
----------------------------------
1) Method "public void ir_framework.tests.TestScenariosCrossProduct.fail2()" - [Failed IR rules: 1]:
   * @IR rule 1: "@compiler.lib.ir_framework.IR(phase={DEFAULT}, applyIfPlatformAnd={}, applyIfCPUFeatureOr={}, counts={"_#CALL#_", "1"}, applyIfPlatform={}, failOn={}, applyIfPlatformOr={}, applyIfOr={}, applyIfCPUFeatureAnd={}, applyIf={"TLABRefillWasteFraction", "53"}, applyIfCPUFeature={}, applyIfAnd={}, applyIfNot={})"
     > Phase "PrintIdeal":
       - counts: Graph contains wrong number of nodes:
         * Constraint 1: "(\\d+(\\s){2}(Call.*Java.*)+(\\s){2}===.*)"
           - Failed comparison: [found] 0 = 1 [given]
           - No nodes matched!

>>> Check stdout for compilation output of the failed methods


Scenario #2
===========
Scenario flags: [-XX:TLABRefillWasteFraction=51]

Command Line:
c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\windows-x64-debug.jdk\\jdk-26\\fastdebug\\bin\\java.exe -DReproduce=true -cp C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\src.full\\open\\test\\hotspot\\jtreg\\testlibrary_tests\\ir_framework\\tests;C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d\\test\\lib;C:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\classes\\0\\testlibrary_tests\\ir_framework\\tests\\TestScenariosCrossProduct.d\\testlibrary_tests;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\jtreg.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\junit-platform-console-standalone-1.13.3.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\testng-7.3.0.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\jcommander-1.82.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\8\\2\\bundles\\jtreg-8+2.zip\\jtreg\\lib\\guice-5.1.0.jar -Djava.library.path=c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-26+19-1893\\windows-x64-debug.test\\hotspot\\jtreg\\native -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:MaxRAMPercentage=4.16667 -Dtest.boot.jdk=c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk\\24\\36\\bundles\\windows-x64\\jdk-24_windows-x64_bin.zip\\jdk-24 -Djava.io.tmpdir=c:\\sb\\prod\\1759552514\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_hotspot_misc\\tmp -XX:+CreateCoredumpOnCrash -Dir.framework.server.port=60746 -XX:TLABRefillWasteFraction=51 -XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -XX:+LogCompilation -XX:CompilerDirectivesFile=test-vm-compile-commands-pid-10544.log -XX:CompilerDirectivesLimit=41 -XX:-OmitStackTraceInFastThrow -DShouldDoIRVerification=true -XX:-BackgroundCompilation -XX:CompileCommand=quiet compiler.lib.ir_framework.test.TestVM ir_framework.tests.TestScenariosCrossProduct

One or more @IR rules failed:

Failed IR Rules (1) of Methods (1)
----------------------------------
1) Method "public void ir_framework.tests.TestScenariosCrossProduct.fail1()" - [Failed IR rules: 1]:
   * @IR rule 1: "@compiler.lib.ir_framework.IR(phase={DEFAULT}, applyIfPlatformAnd={}, applyIfCPUFeatureOr={}, counts={"_#CALL#_", "1"}, applyIfPlatform={}, failOn={}, applyIfPlatformOr={}, applyIfOr={}, applyIfCPUFeatureAnd={}, applyIf={"TLABRefillWasteFraction", "51"}, applyIfCPUFeature={}, applyIfAnd={}, applyIfNot={})"
     > Phase "PrintIdeal":
       - counts: Graph contains wrong number of nodes:
         * Constraint 1: "(\\d+(\\s){2}(Call.*Java.*)+(\\s){2}===.*)"
           - Failed comparison: [found] 0 = 1 [given]
           - No nodes matched!

>>> Check stdout for compilation output of the failed methods



  #############################################################
   - To only run the failed tests use -DTest, -DExclude,
     and/or -DScenarios.
   - To also get the standard output of the test VM run with
     -DReportStdout=true or for even more fine-grained logging
     use -DVerbose=true.
  #############################################################

There are many more failed scenarios in the log file.