From 6c4fab14d66d4a650e716e9c4dd034e427b888b5 Mon Sep 17 00:00:00 2001
From: Chris Eibl <138194463+chris-eibl@users.noreply.github.com>
Date: Fri, 28 Nov 2025 21:38:33 +0100
Subject: [PATCH 1/3] skip debug COFF sections on Windows

---
 Tools/jit/_targets.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Tools/jit/_targets.py b/Tools/jit/_targets.py
index a76d8ff2792602..4c188d74a68602 100644
--- a/Tools/jit/_targets.py
+++ b/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"]

From 6e5fd82785871b70c0097b442cbc8cfe3582b479 Mon Sep 17 00:00:00 2001
From: Chris Eibl <138194463+chris-eibl@users.noreply.github.com>
Date: Fri, 28 Nov 2025 21:43:24 +0100
Subject: [PATCH 2/3] blurb it

---
 .../next/Build/2025-11-28-21-43-07.gh-issue-142050.PFi4tv.rst   | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Build/2025-11-28-21-43-07.gh-issue-142050.PFi4tv.rst

diff --git a/Misc/NEWS.d/next/Build/2025-11-28-21-43-07.gh-issue-142050.PFi4tv.rst b/Misc/NEWS.d/next/Build/2025-11-28-21-43-07.gh-issue-142050.PFi4tv.rst
new file mode 100644
index 00000000000000..c04b8710978bf4
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2025-11-28-21-43-07.gh-issue-142050.PFi4tv.rst
@@ -0,0 +1,2 @@
+Jit stencils should not contain debug data. Only Windows was affected. Fixed
+by Chris Eibl.

From 102fb68104d5ef5ea538ec7913c1beeca5e9fd90 Mon Sep 17 00:00:00 2001
From: Chris Eibl <138194463+chris-eibl@users.noreply.github.com>
Date: Fri, 28 Nov 2025 22:01:29 +0100
Subject: [PATCH 3/3] make mypy happy

---
 Tools/jit/_schema.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Tools/jit/_schema.py b/Tools/jit/_schema.py
index c47e9af924a20e..4e86abe604972e 100644
--- a/Tools/jit/_schema.py
+++ b/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]]