gh-143196: Fix crash in non-standard use of internal JSON encoder object#143618

gh-143196: Fix crash in non-standard use of internal JSON encoder object#143618

serhiy-storchaka merged 4 commits intopython:mainpython/cpython:mainfrom

serhiy-storchaka:json-make-encoder-_current_indent_levelserhiy-storchaka/cpython:json-make-encoder-_current_indent_levelCopy head branch name to clipboard