GH-142050: Jit stencils on Windows contain debug data (#142052)

Co-authored-by: Savannah Ostrowski <savannah@python.org>

Misc/NEWS.d/next/Build/2025-11-28-21-43-07.gh-issue-142050.PFi4tv.rst

@@ -0,0 +1 @@
+Fixed a bug where JIT stencils produced on Windows contained debug data. Patch by Chris Eibl.

Tools/jit/_schema.py

@@ -89,6 +89,7 @@ class COFFSection(typing.TypedDict):
     Characteristics: dict[
         typing.Literal["Flags"], list[dict[typing.Literal["Name"], str]]
     ]
+    Name: dict[typing.Literal["Value"], str]
     Number: int
     RawDataSize: int
     Relocations: list[dict[typing.Literal["Relocation"], COFFRelocation]]

Tools/jit/_targets.py

@@ -267,6 +267,10 @@ class _COFF(
     def _handle_section(
         self, section: _schema.COFFSection, group: _stencils.StencilGroup
     ) -> None:
+        name = section["Name"]["Value"]
+        if name == ".debug$S":
+            # skip debug sections
+            return
         flags = {flag["Name"] for flag in section["Characteristics"]["Flags"]}
         if "SectionData" in section:
             section_data_bytes = section["SectionData"]["Bytes"]