[pull] main from python:main - #1513
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…157662) Send a real SIGINT to the main thread of the user process instead of calling _thread.interrupt_main(), which only sets a flag checked between bytecodes. The signal is sent while holding a new lock which protects sending a message, so that the main thread is not interrupted in the middle of a message. An interrupted wait for a response now releases its lock, so that the socket thread does not deadlock.
…57647) Adding a tag to a Tk text line takes time proportional to the number of tags already in the line, so a line with hundreds of thousands of tokens took hours to colorize. Now only the first 2000 characters of a line are colorized, tag positions are relative to the line start, and tags are added from the end to the start.
GH-157585) compile() can raise MemoryError or RecursionError for too deeply nested source, not only SyntaxError, OverflowError and ValueError. IDLE's Shell then lost its prompt until the input was deleted. Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu> Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Fix out-of-bounds write in mmap.mmap.__setitem__() that could occur when converting the index or the assigned value (via __index__() for a single item, or via the buffer protocol for a slice) resized or closed the mmap object during the assignment. Co-authored-by: Victor Stinner <vstinner@python.org>
…tory (#157643) Start the user process with -P, so that the current directory is not on sys.path while idlelib.run and its dependencies are imported. sys.path is set later by transfer_path(). Protect __main__, idle, and pyshell entry points.
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