run-tests: ensure that --no-rust do not use rust Since having a valid value in HGWITHRUSTEXT is enough to trigger the use of rust, we need to unset it before install to be sure.

rust: bump rust-cpython version to 0.7.2 This version supports Python 3.12 while 0.7.1 did not.

profiling: use "stat" profiler to profile individual request The ls profiler no longer works for that. As the lsprof profiler is not default and not great is general, lets side step the issue for now.

profiling: improve 3.12 error message for calling lsprof twice Python 3.12 prevent lsprof to be enabled if it is already enabled. This break the use of lsprof in `hg serve` as both the initial `serve` command and the request serving want to profile. The "stat" profiler (the default) does not have this problem, so we focus on improving the error message for now.

test: display server error log in test-profile.t This will help us to catch error with Python 3.12

setup: handle removal of old MSVC compiler from setuptools 65.0 (issue6910) It was removed a few years ago[1]. When trying to reproduce locally using a clean py3.12 as called out in the bug report, `setuptools` wasn't installed at all, and needed a `pip install` to fix a `ModuleNotFoundError` when building locally. Maybe that needs to be in the requirements clause now. It looks like this "private" module was added in setuptools 48.0.[2] I can't find a changelog of what version was included in which version of python, and the changelog for pip has a huge gap between when it called out 67.6.1 in `pip` 23.1 (2023-04-15), and 41.4.0 in `pip` 19.3 (2019-10-14).[3] So, we'll just add to the existing code instead of replacing it, for safety. [1] https://github.com/pypa/setuptools/commit/cc017c77948737d131f683e0c25cd37bc639b8fc [2] https://github.com/pypa/setuptools/commit/d034a5ec7f707499139f90eb846b9e720923124c [3] https://pip.pypa.io/en/stable/news/

merge: sort filemap only if requested by the caller The name `sorted` refers to a built-in function, which is always true, so the else branch of this if statement was dead code. Because, with this fix, the function can iterate over the dict items while yielding values, the dict should not change size while the generator is running. Because of that, it is required to re-introduce code that makes a caller copy the filemap before modification, which was removed in 3c783ff08d40cbaf36eb27ffe1d296718c0f1d77 (that changeset also introduced the filemap() method including the bug that’s being fixed by this changeset).