Bug report

With the following in ~/.editrc:

bind "^R" em-inc-search-prev

Pressing CTRL+R inside the macOS-bundled python (/usr/bin/python3, which is compiled against editline) to enter editline history, and then pressing CTRL+C does not properly remove "bck" and does not write KeyboardInterrupt until CTRL+C is pressed two more times for a total of three times.

In other words, inside an editline history search, CTRL+C needs to be sent three times to get back to the normal REPL state.

This video may help with understanding the issue: Homebrew/homebrew-core#118869 (comment)

Your environment

• CPython versions tested on: 3.9.6
• Operating system and architecture: macOS Monterey 12.6.1 / M1 / arm64