Xcode Console "po" error: expression failed to parse

Question

My Xcode cannot po anything suddenly.

For example:

po param

error: expression failed to parse:
error: Couldn't realize type of self.

Every time I use po to print something in the console, it will show the errors above. This started happening one month ago.

Answer 1

I know this does not fix the problem, but meanwhile you can use v param to achieve the expected result.

https://stackoverflow.com/a/60064468/2347811

Answer 2

for my case i just changed build configuration to debug build mode .

edit scheme -> Run -> info -> build configuration -> select Debug