IronPython crashes when repr() handles too long nest dictionary

When repr() takes a deep nested dictionary as argument, IronPython crashes.

test.py

x = {}
for i in range(100000):
    x = {1: x}

repr(x)

Crash report

.......
at Microsoft.Scripting.Interpreter.Interpreter.Run (Microsoft.Scripting.Interpreter.InterpretedFrame) [0x00016] in <252827dbc7924637ba1c8c95b5f54810>:0
at Microsoft.Scripting.Interpreter.LightLambda.Run1<T0_REF, TRet_REF> (T0_REF) [0x0003e] in <252827dbc7924637ba1c8c95b5f54810>:0
at IronPython.Compiler.RuntimeScriptCode.InvokeTarget (Microsoft.Scripting.Runtime.Scope) [0x0006a] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at IronPython.Compiler.RuntimeScriptCode.Run (Microsoft.Scripting.Runtime.Scope) [0x00000] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at IronPython.Hosting.PythonCommandLine.RunFileWorker (string) [0x000e5] in <5cd2739cd27844619789a1aa1ffdb0b0>:0
at IronPython.Hosting.PythonCommandLine.RunFile (string) [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,Microsoft.Scripting.Hosting.Shell.IConsole,Microsoft.Scripting.Hosting.Shell.ConsoleOptions) [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 (string[]) [0x0015b] in <252827dbc7924637ba1c8c95b5f54810>:0
at PythonConsoleHost.Main (string[]) [0x00020] in <9cafe2448f474c41b81ba0c1d71815eb>:0
at (wrapper runtime-invoke) .runtime_invoke_int_object (object,intptr,intptr,intptr) [0x0002a] 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

The reproduction is provided in test.py and builds a dictionary nested 100,000 levels before calling repr(x); start by running it on the stated IronPython and Mono environment. Trace the repr handling using the crash stack as a guide, and consider the issue done when this input no longer crashes and produces the expected representation behavior.