IronLanguages / IronLanguages/ironpython3

Transforming a long list cause IronPython crashes

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Description

See the following example, we transform the map l into list, and then IronPython crashes.

test.py

import operator

N = 500000
l = [0]

for i in range(N):
    l = map(operator.add, l, [1])

print(list(l))

Crash report:

.......
at (wrapper delegate-invoke) .invoke_callvirt_object_Func5<CallSite, CodeContext, object, object, object>_CallSite_CodeContext_object_object(System.Func5<System.Runtime.CompilerServices.CallSite, IronPython.Runtime.CodeContext, object, object, object>,System.Runtime.CompilerServices.CallSite,IronPython.Runtime.CodeContext,object,object)
at Microsoft.Scripting.Interpreter.FuncCallInstruction`6[T0,T1,T2,T3,T4,TRet].Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00000] in <252827dbc7924637ba1c8c95b5f54810>:0
at Microsoft.Scripting.Interpreter.Interpreter.Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00016] in <252827dbc7924637ba1c8c95b5f54810>:0
at Microsoft.Scripting.Interpreter.LightLambda.Run4[T0,T1,T2,T3,TRet] (T0 arg0, T1 arg1, T2 arg2, T3 arg3) [0x0006d] in <252827dbc7924637ba1c8c95b5f54810>:0
at IronPython.Compiler.Ast.CallExpression+Invoke1Instruction.Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00026] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at Microsoft.Scripting.Interpreter.Interpreter.Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00016] in <252827dbc7924637ba1c8c95b5f54810>:0
at Microsoft.Scripting.Interpreter.LightLambda.Run1[T0,TRet] (T0 arg0) [0x0003e] in <252827dbc7924637ba1c8c95b5f54810>:0
at IronPython.Compiler.RuntimeScriptCode.InvokeTarget (Microsoft.Scripting.Runtime.Scope scope) [0x0006a] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at IronPython.Compiler.RuntimeScriptCode.Run (Microsoft.Scripting.Runtime.Scope scope) [0x00000] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at IronPython.Hosting.PythonCommandLine.RunFileWorker (System.String fileName) [0x000e5] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at IronPython.Hosting.PythonCommandLine.RunFile (System.String fileName) [0x0000f] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at Microsoft.Scripting.Hosting.Shell.CommandLine.Run () [0x0003a] in <252827dbc7924637ba1c8c95b5f54810>:0
at IronPython.Hosting.PythonCommandLine.Run () [0x000d8] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at Microsoft.Scripting.Hosting.Shell.CommandLine.Run (Microsoft.Scripting.Hosting.ScriptEngine engine, Microsoft.Scripting.Hosting.Shell.IConsole console, Microsoft.Scripting.Hosting.Shell.ConsoleOptions options) [0x0003c] in <252827dbc7924637ba1c8c95b5f54810>:0
at Microsoft.Scripting.Hosting.Shell.ConsoleHost.RunCommandLine () [0x00053] in <252827dbc7924637ba1c8c95b5f54810>:0
at Microsoft.Scripting.Hosting.Shell.ConsoleHost.ExecuteInternal () [0x00051] in <252827dbc7924637ba1c8c95b5f54810>:0
at PythonConsoleHost.ExecuteInternal () [0x00025] in <9cafe2448f474c41b81ba0c1d71815eb>:0
at Microsoft.Scripting.Hosting.Shell.ConsoleHost.Execute () [0x00032] in <252827dbc7924637ba1c8c95b5f54810>:0
at Microsoft.Scripting.Hosting.Shell.ConsoleHost.Run (System.String[] args) [0x0015b] in <252827dbc7924637ba1c8c95b5f54810>:0
at PythonConsoleHost.Main (System.String[] args) [0x00020] in <9cafe2448f474c41b81ba0c1d71815eb>:0

System

IronPython 3.4.0a1 (3.4.0.0001)
[.NETFramework,Version=v4.6 on Mono 6.12.0.122 (64-bit)] on linux

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

Use test.py as the reproduction case and run it with IronPython 3.4.0a1 on Mono 6.12.0.122, as reported. Trace the map-to-list operation associated with the displayed interpreter stack trace; done means the program completes without crashing and prints the resulting list.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, python
Domain
compilers
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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