flet-dev · FeodorFitsner · Sep 9, 2026 · Sep 9, 2026 · Sep 9, 2026
diff --git a/src/serious_python/CHANGELOG.md b/src/serious_python/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 4.7.0
+
+* **`DartBridge.hardExit(exitCode)`: terminate without running process teardown.** `dart:io`'s `exit()` runs the normal C teardown, which destroys the C++ statics inside every loaded CPython extension module. The interpreter lives on a detached thread that may still be running, so that teardown can fault it, giving a `SIGSEGV` on exit from an app that had already finished its work. `hardExit` skips it. Guard with `DartBridge.canHardExit`, which is `false` against a pre-1.9.0 `libdart_bridge` (the symbol is resolved softly, like `isPythonInitialized` and `signalDartSession`); `hardExit` is then a no-op and the caller should fall back to `exit()`.
+* Bundled python-build snapshot re-pinned to [20260908](https://github.com/flet-dev/python-build/releases/tag/20260908) (`dart_bridge` **1.8.0 -> 1.9.0**), which is what carries the new `serious_python_hard_exit` export. No CPython or Pyodide versions change; the release exists to publish the updated manifest.
+
 ## 4.6.0
 
 * **The bundled CPython runtimes move to 3.12.14 / 3.13.15 / 3.14.7** (from 3.12.13 / 3.13.14 / 3.14.6) — the first Python version move since 4.3.x; every prior 4.4/4.5 release re-pinned python-build without changing a Python version. All three are security releases: they fix a quadratic-complexity DoS in incremental `html.parser.HTMLParser` parsing ([gh-153030](https://github.com/python/cpython/issues/153030)) and quadratic behaviour in `xml.etree.ElementTree` XPath index predicates ([gh-152674](https://github.com/python/cpython/issues/152674)), among others.

diff --git a/src/serious_python/lib/bridge.dart b/src/serious_python/lib/bridge.dart
@@ -3,7 +3,8 @@
 /// See [PythonBridge] for the per-channel API. The lower-level [DartBridge]
 /// singleton (from the platform-interface package) is re-exported here for
 /// embedders that need the process-reuse / session-restart hooks added in
-/// libdart_bridge 1.3.0 — `isPythonInitialized` and `signalDartSession`.
+/// libdart_bridge 1.3.0 (`isPythonInitialized` and `signalDartSession`), or
+/// the teardown-skipping `hardExit` added in 1.9.0.
 library;
 
 export 'package:serious_python_platform_interface/src/dart_bridge_ffi.dart'

diff --git a/src/serious_python/lib/src/python_versions.dart b/src/serious_python/lib/src/python_versions.dart
@@ -1,5 +1,5 @@
 // GENERATED by `dart run serious_python:gen_version_tables` from python-build's
-// manifest.json (release 20260902). Do not edit by hand — edit python-build's
+// manifest.json (release 20260908). Do not edit by hand — edit python-build's
 // manifest.json, cut a release, bump `pythonReleaseDate`, and regenerate.
 
 const pythonVersionEnvironmentVariable = "SERIOUS_PYTHON_VERSION";
@@ -10,8 +10,8 @@ const pyodideVersionEnvironmentVariable = "SERIOUS_PYTHON_PYODIDE_VERSION";
 const dartBridgeVersionEnvironmentVariable = "DART_BRIDGE_VERSION";
 
 /// python-build release the bundled runtimes come from (YYYYMMDD).
-const pythonReleaseDate = "20260902";
-const dartBridgeVersion = "1.8.0";
+const pythonReleaseDate = "20260908";
+const dartBridgeVersion = "1.9.0";
 const defaultPythonVersion = "3.14";
 
 class PythonRelease {

diff --git a/src/serious_python/pubspec.yaml b/src/serious_python/pubspec.yaml
@@ -2,7 +2,7 @@ name: serious_python
 description: A cross-platform plugin for adding embedded Python runtime to your Flutter apps.
 homepage: https://flet.dev
 repository: https://github.com/flet-dev/serious-python
-version: 4.6.0
+version: 4.7.0
 
 platforms:
   ios:

diff --git a/src/serious_python_android/CHANGELOG.md b/src/serious_python_android/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.7.0
+
+* Re-pins the bundled python-build snapshot to **20260908** and `dart_bridge` to **1.9.0**, whose `libdart_bridge.so` adds the `serious_python_hard_exit` export behind `DartBridge.hardExit`. No CPython versions change from 4.6.0 - **3.12.14 / 3.13.15 / 3.14.7** are unchanged.
+
 ## 4.6.0
 
 * **The bundled Android runtimes move to CPython 3.12.14 / 3.13.15 / 3.14.7** (from 3.12.13 / 3.13.14 / 3.14.6). All three are security releases: they fix a quadratic-complexity DoS in incremental `html.parser.HTMLParser` parsing ([gh-153030](https://github.com/python/cpython/issues/153030)) and quadratic behaviour in `xml.etree.ElementTree` XPath index predicates ([gh-152674](https://github.com/python/cpython/issues/152674)), among others. 3.13.15 and 3.14.7 still bundle libexpat **2.8.2**; only 3.12.14 carries **2.8.3** with the [CVE-2026-72522](https://github.com/python/cpython/issues/155558) fix — see the `serious_python` 4.6.0 notes.

diff --git a/src/serious_python_android/android/build.gradle.kts b/src/serious_python_android/android/build.gradle.kts
@@ -21,7 +21,7 @@ buildscript {
 }
 
 group = "com.flet.serious_python_android"
-version = "4.6.0"
+version = "4.7.0"
 
 rootProject.allprojects {
     repositories {

diff --git a/src/serious_python_android/android/python_versions.properties b/src/serious_python_android/android/python_versions.properties
@@ -1,8 +1,8 @@
 # GENERATED by `dart run serious_python:gen_version_tables` from
-# python-build manifest.json (release 20260902). Do not edit by hand.
+# python-build manifest.json (release 20260908). Do not edit by hand.
 default_python_version=3.14
-dart_bridge_version=1.8.0
-python_build_release_date=20260902
+dart_bridge_version=1.9.0
+python_build_release_date=20260908
 3.12.full_version=3.12.14
 3.12.android_abis=arm64-v8a,x86_64,armeabi-v7a
 3.13.full_version=3.13.15

diff --git a/src/serious_python_android/pubspec.yaml b/src/serious_python_android/pubspec.yaml
@@ -2,7 +2,7 @@ name: serious_python_android
 description: Android implementation of the serious_python plugin
 homepage: https://flet.dev
 repository: https://github.com/flet-dev/serious-python
-version: 4.6.0
+version: 4.7.0
 
 environment:
   sdk: ">=3.0.0 <4.0.0"

diff --git a/src/serious_python_darwin/CHANGELOG.md b/src/serious_python_darwin/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 4.7.0
+
+* Re-pins the bundled python-build snapshot to **20260908** and `dart_bridge` to **1.9.0**, whose `dart_bridge.xcframework` adds the `serious_python_hard_exit` export behind `DartBridge.hardExit`. No CPython or Pyodide versions change from 4.6.0 - **3.12.14 / 3.13.15 / 3.14.7** are unchanged, and the python-build release exists to publish the updated manifest.
+* Both-layer XCFramework signing is unchanged from 4.6.0; the runtimes are the same artifacts.
+
 ## 4.6.0
 
 * **iOS/macOS runtimes move to CPython 3.12.14 / 3.13.15 / 3.14.7** (from 3.12.13 / 3.13.14 / 3.14.6). All three are security releases: they fix a quadratic-complexity DoS in incremental `html.parser.HTMLParser` parsing ([gh-153030](https://github.com/python/cpython/issues/153030)) and quadratic behaviour in `xml.etree.ElementTree` XPath index predicates ([gh-152674](https://github.com/python/cpython/issues/152674)), among others. 3.13.15 and 3.14.7 still bundle libexpat **2.8.2**; only 3.12.14 carries **2.8.3** with the [CVE-2026-72522](https://github.com/python/cpython/issues/155558) fix — see the `serious_python` 4.6.0 notes.

diff --git a/src/serious_python_darwin/darwin/python_versions.properties b/src/serious_python_darwin/darwin/python_versions.properties
@@ -1,8 +1,8 @@
 # GENERATED by `dart run serious_python:gen_version_tables` from
-# python-build manifest.json (release 20260902). Do not edit by hand.
+# python-build manifest.json (release 20260908). Do not edit by hand.
 default_python_version=3.14
-dart_bridge_version=1.8.0
-python_build_release_date=20260902
+dart_bridge_version=1.9.0
+python_build_release_date=20260908
 3.12.full_version=3.12.14
 3.12.android_abis=arm64-v8a,x86_64,armeabi-v7a
 3.13.full_version=3.13.15

diff --git a/src/serious_python_darwin/darwin/serious_python_darwin.podspec b/src/serious_python_darwin/darwin/serious_python_darwin.podspec
@@ -4,7 +4,7 @@
 #
 Pod::Spec.new do |s|
   s.name             = 'serious_python_darwin'
-  s.version          = '4.6.0'
+  s.version          = '4.7.0'
   s.summary          = 'A cross-platform plugin for adding embedded Python runtime to your Flutter apps.'
   s.description      = <<-DESC
   A cross-platform plugin for adding embedded Python runtime to your Flutter apps.

diff --git a/src/serious_python_darwin/pubspec.yaml b/src/serious_python_darwin/pubspec.yaml
@@ -2,7 +2,7 @@ name: serious_python_darwin
 description: iOS and macOS implementations of the serious_python plugin
 homepage: https://flet.dev
 repository: https://github.com/flet-dev/serious-python
-version: 4.6.0
+version: 4.7.0
 
 environment:
   # The Swift Package Manager build path needs Flutter 3.44 / Dart 3.11 (the

diff --git a/src/serious_python_linux/CHANGELOG.md b/src/serious_python_linux/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.7.0
+
+* Re-pins the bundled python-build snapshot to **20260908** and `dart_bridge` to **1.9.0**, whose `libdart_bridge.so` adds the `serious_python_hard_exit` export behind `DartBridge.hardExit`. No CPython versions change from 4.6.0 - **3.12.14 / 3.13.15 / 3.14.7** are unchanged.
+
 ## 4.6.0
 
 * **The bundled Linux runtimes move to CPython 3.12.14 / 3.13.15 / 3.14.7** (from 3.12.13 / 3.13.14 / 3.14.6). All three are security releases: they fix a quadratic-complexity DoS in incremental `html.parser.HTMLParser` parsing ([gh-153030](https://github.com/python/cpython/issues/153030)) and quadratic behaviour in `xml.etree.ElementTree` XPath index predicates ([gh-152674](https://github.com/python/cpython/issues/152674)), among others. 3.13.15 and 3.14.7 still bundle libexpat **2.8.2**; only 3.12.14 carries **2.8.3** with the [CVE-2026-72522](https://github.com/python/cpython/issues/155558) fix — see the `serious_python` 4.6.0 notes.

diff --git a/src/serious_python_linux/linux/python_versions.properties b/src/serious_python_linux/linux/python_versions.properties
@@ -1,8 +1,8 @@
 # GENERATED by `dart run serious_python:gen_version_tables` from
-# python-build manifest.json (release 20260902). Do not edit by hand.
+# python-build manifest.json (release 20260908). Do not edit by hand.
 default_python_version=3.14
-dart_bridge_version=1.8.0
-python_build_release_date=20260902
+dart_bridge_version=1.9.0
+python_build_release_date=20260908
 3.12.full_version=3.12.14
 3.12.android_abis=arm64-v8a,x86_64,armeabi-v7a
 3.13.full_version=3.13.15

diff --git a/src/serious_python_linux/pubspec.yaml b/src/serious_python_linux/pubspec.yaml
@@ -2,7 +2,7 @@ name: serious_python_linux
 description: Linux implementations of the serious_python plugin
 homepage: https://flet.dev
 repository: https://github.com/flet-dev/serious-python
-version: 4.6.0
+version: 4.7.0
 
 environment:
   sdk: '>=3.1.3 <4.0.0'

diff --git a/src/serious_python_platform_interface/CHANGELOG.md b/src/serious_python_platform_interface/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 4.7.0
+
+* **`DartBridge.hardExit(exitCode)` / `DartBridge.canHardExit`**, binding `serious_python_hard_exit` from `dart_bridge` 1.9.0. `dart:io`'s `exit()` runs the normal C teardown, which destroys the C++ statics inside every loaded CPython extension module while the interpreter thread may still be running inside one of them; `hardExit` skips it. The symbol is resolved through the existing soft lookup, so an app built against an older `libdart_bridge` still loads, `canHardExit` is `false`, and the caller falls back to `exit()`. See the `serious_python` 4.7.0 notes.
+* Re-pins the bundled python-build snapshot to **20260908** and `dart_bridge` to **1.9.0**.
+
 ## 4.6.0
 
 * Version bump aligning with the `serious_python_*` 4.6.0 release.

diff --git a/src/serious_python_platform_interface/lib/src/dart_bridge_ffi.dart b/src/serious_python_platform_interface/lib/src/dart_bridge_ffi.dart
@@ -70,6 +70,9 @@ typedef _DartBridgeSignalDartSessionNative = Void Function(
 typedef _DartBridgeSignalDartSessionDart = void Function(
     int, Pointer<Pointer<Utf8>>, Pointer<Int64>);
 
+typedef _SeriousPythonHardExitNative = Void Function(Int32);
+typedef _SeriousPythonHardExitDart = void Function(int);
+
 // ---------------------------------------------------------------------------
 // Library binding
 // ---------------------------------------------------------------------------
@@ -104,6 +107,12 @@ class DartBridge {
       'dart_bridge_signal_dart_session',
       (f) => f.asFunction<_DartBridgeSignalDartSessionDart>(),
     );
+    // dart_bridge >= 1.9.0 export; same soft-lookup rationale as above.
+    _hardExit = _lookupOrNull<_SeriousPythonHardExitNative,
+        _SeriousPythonHardExitDart>(
+      'serious_python_hard_exit',
+      (f) => f.asFunction<_SeriousPythonHardExitDart>(),
+    );
   }
 
   // Generic helper for soft symbol lookup — returns null if the binary
@@ -125,6 +134,7 @@ class DartBridge {
   late final _DartBridgeEnqueueMessageDart _enqueueMessage;
   late final _DartBridgeIsPythonInitializedDart? _isPythonInitialized;
   late final _DartBridgeSignalDartSessionDart? _signalDartSession;
+  late final _SeriousPythonHardExitDart? _hardExit;
 
   static DartBridge? _instance;
 
@@ -220,6 +230,21 @@ class DartBridge {
       f(portMap.length, labels, ports);
     });
   }
+
+  /// True when the loaded libdart_bridge exports [hardExit] (>= 1.9.0).
+  /// Callers should branch on this rather than assuming the call terminates.
+  bool get canHardExit => _hardExit != null;
+
+  /// Terminate the process immediately with [exitCode], skipping `atexit`
+  /// handlers and C++ static destructors. Does not return, *unless* running
+  /// against a pre-1.9.0 libdart_bridge, where it is a no-op and the caller
+  /// must fall back to `dart:io`'s `exit()`.
+  ///
+  /// `dart:io`'s `exit()` runs the normal C teardown, which destroys the C++
+  /// statics inside every loaded CPython extension module. The interpreter
+  /// lives on a detached thread that may still be running, so that teardown
+  /// can fault it. Use this instead wherever the process is going away anyway.
+  void hardExit(int exitCode) => _hardExit?.call(exitCode);
 }
 
 // ---------------------------------------------------------------------------

diff --git a/src/serious_python_platform_interface/pubspec.yaml b/src/serious_python_platform_interface/pubspec.yaml
@@ -2,7 +2,7 @@ name: serious_python_platform_interface
 description: A common platform interface for the serious_python plugin.
 homepage: https://flet.dev
 repository: https://github.com/flet-dev/serious-python
-version: 4.6.0
+version: 4.7.0
 
 environment:
   sdk: ">=3.0.0 <4.0.0"

diff --git a/src/serious_python_windows/CHANGELOG.md b/src/serious_python_windows/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.7.0
+
+* Re-pins the bundled python-build snapshot to **20260908** and `dart_bridge` to **1.9.0**, whose `dart_bridge.dll` adds the `serious_python_hard_exit` export behind `DartBridge.hardExit`. No CPython versions change from 4.6.0 - **3.12.14 / 3.13.15 / 3.14.7** are unchanged.
+
 ## 4.6.0
 
 * **The bundled Windows runtimes move to CPython 3.12.14 / 3.13.15 / 3.14.7** (from 3.12.13 / 3.13.14 / 3.14.6). All three are security releases: they fix a quadratic-complexity DoS in incremental `html.parser.HTMLParser` parsing ([gh-153030](https://github.com/python/cpython/issues/153030)) and quadratic behaviour in `xml.etree.ElementTree` XPath index predicates ([gh-152674](https://github.com/python/cpython/issues/152674)), among others. 3.13.15 and 3.14.7 still bundle libexpat **2.8.2**; only 3.12.14 carries **2.8.3** with the [CVE-2026-72522](https://github.com/python/cpython/issues/155558) fix — see the `serious_python` 4.6.0 notes.

diff --git a/src/serious_python_windows/pubspec.yaml b/src/serious_python_windows/pubspec.yaml
@@ -2,7 +2,7 @@ name: serious_python_windows
 description: Windows implementations of the serious_python plugin
 homepage: https://flet.dev
 repository: https://github.com/flet-dev/serious-python
-version: 4.6.0
+version: 4.7.0
 
 environment:
   sdk: '>=3.1.3 <4.0.0'

diff --git a/src/serious_python_windows/windows/python_versions.properties b/src/serious_python_windows/windows/python_versions.properties
@@ -1,8 +1,8 @@
 # GENERATED by `dart run serious_python:gen_version_tables` from
-# python-build manifest.json (release 20260902). Do not edit by hand.
+# python-build manifest.json (release 20260908). Do not edit by hand.
 default_python_version=3.14
-dart_bridge_version=1.8.0
-python_build_release_date=20260902
+dart_bridge_version=1.9.0
+python_build_release_date=20260908
 3.12.full_version=3.12.14
 3.12.android_abis=arm64-v8a,x86_64,armeabi-v7a
 3.13.full_version=3.13.15