oracle / oracle/graalpython

[Bug]: UnsupportedSpecializationException with property setter

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bug
Dominant language
Python
Stars
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Forks
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Avg merge
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Merged PRs (30d)
36

Description

Describe the bug

GraalPy crashes when running this fuzzed code:

class C:
    @property.setter
    def p(self):
       pass
Operating system

Linux

CPU architecture

x86_64

GraalPy version

GraalPy 3.13.14 (Oracle GraalVM Native 25.3.4.1)

JDK version

No response

Context configuration

No response

Steps to reproduce

Snippet listed above

Expected behavior

No crash

Stack trace
Unexpected values provided for PropertyBuiltinsFactory.PropertySetterNodeFactory.PropertySetterNodeGen@4ed7db72: [PFunction C.p at 0x721a4f46, NoValue], [PFunction,PNone]
com.oracle.truffle.api.dsl.UnsupportedSpecializationException: Unexpected values provided for PropertyBuiltinsFactory.PropertySetterNodeFactory.PropertySetterNodeGen@4ed7db72: [PFunction C.p at 0x721a4f46, NoValue], [PFunction,PNone]
	at org.graalvm.py/com.oracle.graal.python.builtins.objects.property.PropertyBuiltinsFactory$PropertySetterNodeFactory$PropertySetterNodeGen.executeImpl(PropertyBuiltinsFactory.java:1146)
	at org.graalvm.py/com.oracle.graal.python.builtins.objects.property.PropertyBuiltins$PropertyCopyingNode.executeBoundary(PropertyBuiltins.java:305)
	at org.graalvm.py/com.oracle.graal.python.builtins.objects.property.PropertyBuiltins$PropertyCopyingNode.execute(PropertyBuiltins.java:297)
	at org.graalvm.py/com.oracle.graal.python.nodes.function.builtins.BuiltinCallNode$BuiltinBinaryCallNode.execute(BuiltinCallNode.java:106)
	at org.graalvm.py/com.oracle.graal.python.nodes.function.BuiltinFunctionRootNode.execute(BuiltinFunctionRootNode.java:337)
	at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:808)
	at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:722)
	at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:641)
	at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124)
	at com.oracle.truffle.enterprise.svm/com.oracle.svm.enterprise.truffle.compiler.SubstrateEnterpriseOptimizedCallTarget.invokeCompiledAdapterOrCallBoundary(SubstrateEnterpriseOptimizedCallTarget.java:293)
	at com.oracle.truffle.enterprise.svm/com.oracle.svm.enterprise.truffle.compiler.SubstrateEnterpriseOptimizedCallTarget.invokeFromInterpreter(SubstrateEnterpriseOptimizedCallTarget.java:269)
	at com.oracle.truffle.enterprise.svm/com.oracle.svm.enterprise.truffle.compiler.SubstrateEnterpriseOptimizedCallTarget.doInvoke(SubstrateEnterpriseOptimizedCallTarget.java:255)
	at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:573)
	at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.call(OptimizedCallTarget.java:519)
	at org.graalvm.truffle/com.oracle.truffle.api.nodes.IndirectCallNode$1.call(IndirectCallNode.java:96)
	at org.graalvm.py/com.oracle.graal.python.nodes.call.CallDispatchers$SimpleIndirectInvokeNode.doIndirect(CallDispatchers.java:167)
	at org.graalvm.py/com.oracle.graal.python.nodes.call.CallDispatchersFactory$SimpleIndirectInvokeNodeGen$Uncached.execute(CallDispatchersFactory.java:307)
	at org.graalvm.py/com.oracle.graal.python.nodes.call.CallDispatchers$BuiltinFunctionCachedCallNode.callBuiltinFunctionMegamorphic(CallDispatchers.java:265)
	at org.graalvm.py/com.oracle.graal.python.nodes.call.CallDispatchersFactory$BuiltinFunctionCachedCallNodeGen$Uncached.execute(CallDispatchersFactory.java:1173)
	at org.graalvm.py/com.oracle.graal.python.nodes.call.CallNode.builtinFunctionCall(CallNode.java:152)
	at org.graalvm.py/com.oracle.graal.python.nodes.call.CallNodeGen$Uncached.executeInternal(CallNodeGen.java:619)
	at org.graalvm.py/com.oracle.graal.python.nodes.call.CallNode.execute(CallNode.java:128)
	at org.graalvm.py/com.oracle.graal.python.nodes.call.special.CallUnaryMethodNode.call(CallUnaryMethodNode.java:180)
	at org.graalvm.py/com.oracle.graal.python.nodes.bytecode_dsl.PBytecodeDSLRootNodeGen$CallUnaryMethod_Node.execute$uncached(PBytecodeDSLRootNodeGen.java)
	at org.graalvm.py/com.oracle.graal.python.nodes.bytecode_dsl.PBytecodeDSLRootNodeGen$UncachedBytecodeNodeTailCall.handleCallUnaryMethod_(PBytecodeDSLRootNodeGen.java:37850)
	at org.graalvm.py/com.oracle.graal.python.nodes.bytecode_dsl.PBytecodeDSLRootNodeGen$UncachedBytecodeNodeTailCall.__stub_handleCallUnaryMethod_(PBytecodeDSLRootNodeGen.java:0)
	at org.graalvm.py/com.oracle.graal.python.nodes.bytecode_dsl.PBytecodeDSLRootNodeGen$UncachedBytecodeNodeTailCall.continueAt(PBytecodeDSLRootNodeGen.java:35093)
	at org.graalvm.py/com.oracle.graal.python.nodes.bytecode_dsl.PBytecodeDSLRootNodeGen.continueAt(PBytecodeDSLRootNodeGen.java:3501)
	at org.graalvm.py/com.oracle.graal.python.nodes.bytecode_dsl.PBytecodeDSLRootNodeGen.execute(PBytecodeDSLRootNodeGen.java:3493)
[...snip...]
Additional context

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the property setter path in graalpython and the PropertyBuiltins.java stack-trace entry, then reproduce the minimal Python snippet on the reported GraalPy version. Trace the setter call that receives the unexpected values and add regression coverage if the surrounding tests provide an entry point. Done means the snippet completes without an UnsupportedSpecializationException.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, python
Domain
backend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Active
Clarity
Clearly specified
Newbie friendliness
76/100

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