Packagedev errors out on start up

[falsefalse]

Started happening after last couple of updates

Package Control: Installed package "PackageDev" 3.7.1
Package Control: Installed library "PyYAML" 5.1.1 for Python 3.8
Package Control: Package PackageDev successfully installed
...
reloading plugin PackageDev.main
Traceback (most recent call last):
  File "/Applications/Sublime Text.app/Contents/MacOS/Lib/python38/sublime_plugin.py", line 324, in reload_plugin
    m = importlib.import_module(modulename)
  File "./python3.8/importlib/__init__.py", line 127, in import_module
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 868, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/falsefalse/Library/Application Support/Sublime Text 3/Installed Packages/PackageDev.sublime-package/main.py", line 15, in <module>
  File "/Users/falsefalse/Library/Application Support/Sublime Text 3/Installed Packages/PackageDev.sublime-package/plugins/__init__.py", line 4, in <module>
  File "/Users/falsefalse/Library/Application Support/Sublime Text 3/Installed Packages/PackageDev.sublime-package/plugins/color_scheme_dev.py", line 10, in <module>
  File "/Users/falsefalse/Library/Application Support/Sublime Text 3/Installed Packages/PackageDev.sublime-package/plugins/lib/scope_data/__init__.py", line 89, in <module>
TypeError: 'type' object is not subscriptable

I'm on 4200.

[dmytrovoytko]

Hey! I observe similar issues. ST 4200, Linux. Checked on both "disable_plugin_host_3.3": true and without.

As I checked, it is after the latest releases,
where class NodeSet(set[ScopeNode]): changes appeared (it was class NodeSet(set): before - in v3.6.2)

[lukekasz]

It looks like the developers of this package are using the latest Sublime Text development builds where Python has been upgraded to 3.14

https://www.sublimetext.com/dev

E.g.

Build 4205
23 Apr 2026
- Upgraded Python 3.8 to Python 3.14

According to the 3.7.0 release, the package should be compatible with Sublime Text 4135

https://github.com/SublimeText/PackageDev/releases/tag/st-4135%2F3.7.0

This new release requires ST build 4135 or higher.
The next stable build is 4142 and was released on 10 November 2022, so almost 4 years ago.
Support for older builds is dropped and they will remain on 3.6.x.

However, Sublime Text 4135 uses Python 3.8, so the latest PackageDev 3.71 version is incompatible with Sublime Text 4135