Description of the Issue

In order to apply a UDL to a couple of hundred file type (numeric, ranging from .1 to .200), I edited direct the underlying userDefineLang.xml file. It was easier to script a generator for the extension, and copy and paste them to the file. Unfortunately, on opening NP++, the application crashed.

Steps to Reproduce the Issue

1. Edit the userDefineLang.xml. For example, the opening tag in my current XML is:

<NotepadPlus>
    <UserLang name="Pexip" ext="log 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87" udlVersion="2.1">

Adding any more extensions to the list will cause NP++ to crash on open (I was looking to add up to 200)

Expected Behavior

Not to crash.
Ideally, to handle multiple extension via pattern matching (longer term feature).

Actual Behavior

NP++ crashed and would not start. userDefineLang.xml then had to be edited in another text editor to remove the additional extensions, in order for NP++ to start - not straight forward as even opening normal windows Notepad, redirect me to NP++.

Debug Information

Notepad++ v7.2.2 (32-bit)
Build time : Nov 27 2016 - 16:31:07
Path : C:\Program Files (x86)\Notepad++\notepad++.exe
Admin mode : OFF
Local Conf mode : OFF
OS : Windows 10
Plugins : AnalysePlugin.dll AndroidLogger.dll ComparePlugin.dll mimeTools.dll NotepadStarterPlugin.dll NppConverter.dll NppExport.dll NPPJSONViewer.dll PluginManager.dll

FWIW, there is a forum post on this at https://notepad-plus-plus.org/community/topic/12992/user-define-language-extensions-too-many-causes-a-crash-but-not-enough-allowed.

As I note in that post, if you manually keep adding extensions into the Extension box in the UDL dialogue, it will only save back a certain number of these (I got to 87 (see above) with another text extension included). It doesn’t stop you from entering more extensions, only that it saves out a limited set.