Unity – How to stop Play Mode in case of infinite loop?

I just got into this situation: accidental infinite loop, stuck in play mode on a scene with unsaved work, Unity unresponsive.

But I was lucky enough to have Monodevelop open, even though I was mainly using Sublime for scripting. I pressed the button to start debugging near the top left of the Monodevelop window, then hit the pause button. Execution paused on a line in the middle of my infinite loop. Windows task manager confirmed Unity was no longer locking the CPU.

In Monodevelop, I was then able to find an object obj that the next line would attempt a method call on, and use the “Immediate” window to execute obj = null. Then unpause. Unity itself now unlocks because of the null pointer error, and I could take it out of play mode and save my work.

(Unity 2017.4.1f1 Personal, Windows 10 Home x64, Monodevelop 5.9.6)

Note, I got the idea from reading @Kinxil’s answer, but I had to take a slightly different approach because there was no “blocking value”. I had a for (;;) loop that had previously been inside a coroutine and I changed it to be inside a FixedUpdate() without removing the loop. :\ So causing an exception was the only option I could think of.

Related Posts:

  1. How to find child of a GameObject or the script attached to child GameObject via script
  2. Getting mouse position in unity
  3. How to make the script wait/sleep in a simple way in unity
  4. Unity OnTriggerEnter2D not registering
  5. OnCollisionEnter() not working in Unity3D
  6. Unity cannot convert from ‘string’ to ‘int’
  7. Can’t add script component because the script class cannot be found?
  8. Why should I use SerializeField?
  9. OnTriggerEnter not working at Unity3D
  10. How to jump in Unity 3d?
  11. Unity3d no Monobehaviour scripts in the file, or their names don’t match the file name
  12. Unity3d restart current scene
  13. How to move 2D Object with WASD in Unity
  14. The Object you want to instantiate is null. Unity 3D
  15. Unity 2d jumping script
  16. OnCollisionEnter2D not being executed?
  17. Unity “The associated script can not be loaded” and “Win32Exception: The system cannot find the file specified”
  18. Unity – Gameobject look at mouse
  19. Error when Building Project: Error building Player because scripts have compile errors in the editor
  20. Unity3D. Trying to send command for object without authority
  21. Expression denotes a `type’, where a `variable’, `value’ or `method group’ was expected UNITY3D
  22. How to pass data (and references) between scenes in Unity
  23. Rotate object in Unity 3D
  24. OnCollisionEnter is not called in unity
  25. Unity 5.2.2 changing Visual Studio back to MonoDevelop
  26. “A namespace cannot directly contain members such as fields or methods”
  27. Unity Scripts edited in Visual studio don’t provide autocomplete
  28. Is there a keyboard shortcut to maximize the Game window in Unity in Play Mode?
  29. How to connect to database from Unity
  30. How can I convert String to Int?
  31. Process cannot access the file because it is being used by another proess
  32. How to convert JSON to XML or XML to JSON?
  33. Virustotal Trapmine suspicious.low.ml.score
  34. Convert int to string?
  35. How to Sort a List by a property in the object
  36. The page was not displayed because the request entity is too large on IIS
  37. How to open .dll files to see what is written inside?
  38. how does Request.QueryString work?
  39. Extension methods must be defined in a non-generic static class
  40. Return multiple values to a method caller
  41. Regex that accepts only numbers (0-9) and NO characters
  42. How to resolve this System.IO.FileNotFoundException
  43. Fire ontextchanged() event of an asp:TextBox via Javascript
  44. C# Gridview CheckBox Field VS (Template Field + CheckBox)
  45. Extension methods must be defined in a non-generic static class
  46. Convert char to int in C#
  47. The remote server returned an error: (403) Forbidden
  48. How do I encode and decode a base64 string?
  49. How to add a delay for a 2 or 3 seconds
  50. Multiple file-extensions searchPattern for System.IO.Directory.GetFiles
  51. calling javascript function on OnClientClick event of a Submit button
  52. C# – Illegal characters in path
  53. Getting The ASCII Value of a character in a C# string
  54. Process exists with ExitCode 255
  55. The data types text and varchar are incompatible in the equal to operator in C#
  56. Name does not exist in the current context
  57. Unable to read data from the transport connection : An existing connection was forcibly closed by the remote host
  58. The remote server returned an error: (407) Proxy Authentication Required
  59. IsNumeric function in c#
  60. The calling thread must be STA, because many UI components require this in WPF
  61. The type initializer for ‘MyClass’ threw an exception
  62. The server committed a protocol violation. Section=ResponseStatusLine ERROR
  63. Specified cast is not valid.. how to resolve this
  64. C# switch on type
  65. How to post JSON to a server using C#?
  66. C# Error (Cannot Implicitly convert type ‘string’ to ‘int’)
  67. EF CodeFirst: Either the parameter @objname is ambiguous or the claimed @objtype (COLUMN) is wrong
  68. How can I cast int to enum?
  69. What is the C# equivalent of friend?
  70. How to get relative path of a file in visual studio?
  71. Error Message: Type or namespace definition, or end-of-file expected
  72. Make first letter of a string upper case (with maximum performance)
  73. ‘An exception occurred during a WebClient request” while using C# ASP.NET
  74. How to download image from URL
  75. Visual Studio keeps crashing
  76. Is there an equivalent to the Scanner class in C# for strings?
  77. The opposite of the modulo operator?
  78. How can I implement static methods on an interface?
  79. How to add List<> to a List<> in asp.net [duplicate]
  80. get path for my .exe
  81. AddTransient, AddScoped and AddSingleton Services Differences
  82. Critical error detected c0000374 – C++ dll returns pointer off allocated memory to C#
  83. Linq select objects in list where exists IN (A,B,C)
  84. Unable to determine the principal end of an association between the types
  85. What is a quick way to force CRLF in C# / .NET?
  86. How to enable assembly bind failure logging (Fusion) in .NET
  87. How to make inline functions in C#
  88. Create html documentation for C# code
  89. C# Convert List to Dictionary
  90. Where can I read the Console output in Visual Studio 2015
  91. Differences between SFTP and “FTP over SSH”
  92. When should I use a List vs a LinkedList
  93. Go To Definition: “Cannot navigate to the symbol under the caret.”
  94. Why am I getting an Exception with the message “Invalid setup on a non-virtual (overridable in VB) member…”?
  95. IF Statement multiple conditions, same statement
  96. What is the easiest way to handle associative array in c#?
  97. What does the M stand for in C# Decimal literal notation?
  98. Iif equivalent in C#
  99. Convert an array to string
  100. is inaccessible due to its protection level

Leave a Comment

tech