Incorrect minimum version of Python for Windows build bootstrapping

[msprotz]

Bug report

Bug description:

Python now requires 3.10 to build itself, because match case statements have begun proliferating in the cpython repository. However, the Windows build still thinks 3.9 is enough, which results in a build error on a standard Visual Studio 2022 environment.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-122573: Require Python 3.10 or newer for Windows builds #122574
• [3.13] gh-122573: Require Python 3.10 or newer for Windows builds (GH-122574) #122674
• [3.12] gh-122573: Require Python 3.10 or newer for Windows builds (GH-122574) #122677

[Eclips4]

Hello!
I can build CPython on Windows using the 3.9 version. Can you please show the error?

[Eclips4]

I can reproduce it by building CPython with the --experimental-jit option:

  Regenerate Global Objects
  # not changed: C:\Users\KIRILL-1\CLionProjects\cpython\Include\internal\pycore_global_strings.h
  # not changed: C:\Users\KIRILL-1\CLionProjects\cpython\Include\internal\pycore_runtime_init_generated.h
  # not changed: C:\Users\KIRILL-1\CLionProjects\cpython\Include\internal\pycore_unicodeobject_generated.h
  # not changed: C:\Users\KIRILL-1\CLionProjects\cpython\Include\internal\pycore_global_objects_fini_generated.h
  Traceback (most recent call last):
    File "C:\Users\KIRILL-1\CLionProjects\cpython\Tools\jit\build.py", line 8, in <module>
      import _targets
    File "C:\Users\KIRILL-1\CLionProjects\cpython\Tools\jit\_targets.py", line 275
      match relocation:
            ^
  SyntaxError: invalid syntax

So it's actually related only to the jit build. The default build is not affected.

[msprotz]

C:\Users\protz\Desktop\cpython\PCbuild>build
Using py -3.9 (found 3.9 with py.exe)
...
  Regenerate keyword.py
  Regenerate Global Objects
  # not changed: C:\Users\protz\Desktop\cpython\Include\internal\pycore_global_strings.h
  # not changed: C:\Users\protz\Desktop\cpython\Include\internal\pycore_runtime_init_generated.h
  # not changed: C:\Users\protz\Desktop\cpython\Include\internal\pycore_unicodeobject_generated.h
  # not changed: C:\Users\protz\Desktop\cpython\Include\internal\pycore_global_objects_fini_generated.h
  Regenerate cases
  Traceback (most recent call last):
    File "C:\Users\protz\Desktop\cpython\Tools\cases_generator\opcode_id_generator.py", line 8, in <module>
      from analyzer import (
    File "C:\Users\protz\Desktop\cpython\Tools\cases_generator\analyzer.py", line 724
      match part:
            ^
  SyntaxError: invalid syntax
C:\Users\protz\Desktop\cpython\PCbuild\regen.targets(93,5): error MSB3073: The command "py -3.9 Tools\cases_generator\o
pcode_id_generator.py Python\bytecodes.c" exited with code 1. [C:\Users\protz\Desktop\cpython\PCbuild\pythoncore.vcxpro
j]

Build FAILED.

C:\Users\protz\Desktop\cpython\PCbuild\regen.targets(93,5): error MSB3073: The command "py -3.9 Tools\cases_generator\o
pcode_id_generator.py Python\bytecodes.c" exited with code 1. [C:\Users\protz\Desktop\cpython\PCbuild\pythoncore.vcxpro
j]
    0 Warning(s)
    1 Error(s)

[msprotz]

This is without the --jit option -- I believe my other PR touched something related to global objects, which in turn triggered the invocation of cases_generator/opcode_id_generator.py, which failed, on the default build.

[msprotz]

This is the other PR: #119316

[Eclips4]

This is without the --jit option -- I believe my other PR touched something related to global objects, which in turn triggered the invocation of cases_generator/opcode_id_generator.py, which failed, on the default build.

You're right.