exit function crashes with sed error

[max-baz]

This line:

termpdf/termpdf

Line 362 in 5d9e979

sed -i '.bak' "s|^$document_fullpath.*|$document_fullpath,$doc_state|" "$HOME/.config/termpdf/cache"

Crashes with:

sed: -e expression #1, char 1: unknown command: `.'

I'm guessing instead of -i '.bak' it should be -i.bak.