JDK-8249602 : C2: assert(cnt == _outcnt) failed: no insertions allowed
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 11,14,15,16
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- Submitted: 2020-07-16
- Updated: 2020-09-24
- Resolved: 2020-07-28
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 11 | JDK 16 |
|---|---|
| 11.0.10-oracleFixed | 16 b08Fixed  |
Description
The attached fuzzer test fails intermittently with the following assertion. To reproduce: $ java Test.java # # A fatal error has been detected by the Java Runtime Environment: # # Internal Error (/home/christian/jdk/open/src/hotspot/share/opto/node.cpp:214), pid=19747, tid=19759 # assert(cnt == _outcnt) failed: no insertions allowed # # JRE version: Java(TM) SE Runtime Environment (16.0) (slowdebug build 16-internal+0-2020-07-13-1111353.christian...) # Java VM: Java HotSpot(TM) 64-Bit Server VM (slowdebug 16-internal+0-2020-07-13-1111353.christian..., mixed mode, tiered, compressed oops, g1 gc, linux-amd64) # Problematic frame: # V [libjvm.so+0xe5a558] DUIterator_Fast::verify(Node const*, bool)+0x58 .......... Command Line: --add-modules=ALL-DEFAULT jdk.compiler/com.sun.tools.javac.launcher.Main Test.java .......... Current thread (0x00007f75f03537e0): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=19759, stack(0x00007f75d80b4000,0x00007f75d81b5000)] Current CompileTask: C2: 8010 1788 4 Test::iMeth (221 bytes) Stack: [0x00007f75d80b4000,0x00007f75d81b5000], sp=0x00007f75d81af050, free space=1004k Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code) V [libjvm.so+0xe5a558] DUIterator_Fast::verify(Node const*, bool)+0x58 V [libjvm.so+0x5e059e] DUIterator_Fast::operator++(int)+0x4a V [libjvm.so+0xd00760] PhaseIdealLoop::insert_post_loop(IdealLoopTree*, Node_List&, CountedLoopNode*, CountedLoopEndNode*, Node*, Node*, CountedLoopNode*&)+0x864 V [libjvm.so+0xcfebd8] PhaseIdealLoop::insert_pre_post_loops(IdealLoopTree*, Node_List&, bool)+0x39a V [libjvm.so+0xd07582] IdealLoopTree::iteration_split_impl(PhaseIdealLoop*, Node_List&)+0x388 V [libjvm.so+0xd07817] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x10b V [libjvm.so+0xd07748] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x3c V [libjvm.so+0xd07748] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x3c V [libjvm.so+0xd078b5] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x1a9 V [libjvm.so+0xd078b5] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x1a9 V [libjvm.so+0xd1aae4] PhaseIdealLoop::build_and_optimize(LoopOptsMode)+0x1470 V [libjvm.so+0x6e1dfb] PhaseIdealLoop::PhaseIdealLoop(PhaseIterGVN&, LoopOptsMode)+0xb3 V [libjvm.so+0x6e1ef6] PhaseIdealLoop::optimize(PhaseIterGVN&, LoopOptsMode)+0x46 V [libjvm.so+0x6d64ff] Compile::Optimize()+0x907 V [libjvm.so+0x6cfaca] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, DirectiveSet*)+0x1090 V [libjvm.so+0x5ce7a7] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x15b V [libjvm.so+0x6ea926] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x88e V [libjvm.so+0x6e95b3] CompileBroker::compiler_thread_loop()+0x3df V [libjvm.so+0x10a0bdf] compiler_thread_entry(JavaThread*, Thread*)+0x69 V [libjvm.so+0x109bd90] JavaThread::thread_main_inner()+0x146 V [libjvm.so+0x109bc41] JavaThread::run()+0x11f V [libjvm.so+0x1097eca] Thread::call_run()+0x180 V [libjvm.so+0xea6716] thread_native_entry(Thread*)+0x1e4
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