```
[ RUN ] NMTCommittedVirtualMemoryTracker.test_committed_virtualmemory_region_vm
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (c:\\a\\jdk\\jdk\\src\\hotspot\\share\\nmt/regionsTree.hpp:64), pid=6956, tid=9528
# assert(position() > other.position()) failed: negative distance
#
# JRE version: OpenJDK Runtime Environment (26.0) (fastdebug build 26-internal-tstuefe-de2f3bfe9d8de57cb088f2a6cfa0a21210ebde05)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 26-internal-tstuefe-de2f3bfe9d8de57cb088f2a6cfa0a21210ebde05, mixed mode, tiered, compressed oops, compressed class ptrs, g1 gc, windows-amd64)
# Problematic frame:
# V [jvm.dll+0x1615df3] Treap<unsigned __int64,VMATree::IntervalChange,VMATree::PositionComparator,TreapCHeapAllocator>::visit_in_order<`RegionsTree::visit_reserved_regions<`VirtualMemoryTracker::walk_virtual_memory'::`2'::<lambda_1> >'::`2'::<lambda_1> >+0x313
#
# Core dump will be written. Default location: C:\\a\\jdk\\jdk\\build\\run-test-prebuilt\\test-support\\jtreg_test_hotspot_jtreg_tier1_common\\scratch\\hs_err_pid6956.mdmp
#
# An error report file with more information is saved as:
# C:\\a\\jdk\\jdk\\build\\run-test-prebuilt\\test-support\\jtreg_test_hotspot_jtreg_tier1_common\\scratch\\hs_err_pid6956.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
```

Stack

```
Stack: [0x000000d4c3c00000,0x000000d4c3d00000], sp=0x000000d4c3cfe290, free space=1016k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [jvm.dll+0x1615df3] Treap<unsigned __int64,VMATree::IntervalChange,VMATree::PositionComparator,TreapCHeapAllocator>::visit_in_order<`RegionsTree::visit_reserved_regions<`VirtualMemoryTracker::walk_virtual_memory'::`2'::<lambda_1> >'::`2'::<lambda_1> >+0x313 (nmtTreap.hpp:387)
V [jvm.dll+0x1617b3c] VirtualMemoryTracker::Instance::snapshot_thread_stacks+0xec (virtualMemoryTracker.cpp:327)
V [jvm.dll+0x178c79] CommittedVirtualMemoryTest::test+0x139 (test_committed_virtualmemory.cpp:46)
V [jvm.dll+0x177e1d] NMTCommittedVirtualMemoryTracker_test_committed_virtualmemory_region_vm_Test::TestBody+0x2d (test_committed_virtualmemory.cpp:236)
V [jvm.dll+0x16fadbd] testing::internal::HandleExceptionsInMethodIfSupported<testing::Test,void>+0x5d (gtest.cc:2670)
V [jvm.dll+0x1723b34] testing::TestInfo::Run+0x1b4 (gtest.cc:2836)
V [jvm.dll+0x1723ec6] testing::TestSuite::Run+0x2a6 (gtest.cc:3017)
V [jvm.dll+0x17248d3] testing::internal::UnitTestImpl::RunAllTests+0x5b3 (gtest.cc:5921)
V [jvm.dll+0x16faec1] testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl,bool>+0x61 (gtest.cc:2670)
V [jvm.dll+0x172418d] testing::UnitTest::Run+0x13d (gtest.cc:5484)
V [jvm.dll+0x9f746] runUnitTestsInner+0x356 (gtestMain.cpp:292)
V [jvm.dll+0x9f995] runUnitTests+0xb5 (gtestMain.cpp:373)
C [gtestLauncher.exe+0x101c] main+0x1c (gtestLauncher.cpp:40)
C [gtestLauncher.exe+0x121c] __scrt_common_main_seh+0x10c (exe_common.inl:288)
C [KERNEL32.DLL+0x2e8d7] (no source info available)
C [ntdll.dll+0x3c34c] (no source info available)
```

https://github.com/tstuefe/jdk/actions/runs/16593350383/attempts/1#user-content-gtest_nmtgtests#nmt-detail