RustPython · youknowone · Jun 26, 2026 · Jun 22, 2026 · Jun 23, 2026 · Jun 23, 2026
diff --git a/.cspell.json b/.cspell.json
@@ -66,8 +66,11 @@
     "deoptimize",
     "emscripten",
     "excs",
+    "flufl",
     "fnfe",
+    "fsdefault",
     "ifexp",
+    "implicits",
     "interps",
     "jitted",
     "jitting",

diff --git a/.github/actions/install-linux-deps/action.yml b/.github/actions/install-linux-deps/action.yml
@@ -39,11 +39,36 @@ runs:
     - name: Install Linux dependencies
       shell: bash
       if: ${{ runner.os == 'Linux' }}
-      run: >
-        sudo apt-get update
+      env:
+        GCC_MULTILIB: ${{ inputs.gcc-multilib }}
+        MUSL_TOOLS: ${{ inputs.musl-tools }}
+        CLANG: ${{ inputs.clang }}
+        GCC_AARCH64_LINUX_GNU: ${{ inputs.gcc-aarch64-linux-gnu }}
+      run: |
+        if ! sudo apt-get update; then
+          echo "::warning::apt-get update failed; disabling nonessential Microsoft apt sources and retrying"
+          for source in /etc/apt/sources.list.d/*microsoft* /etc/apt/sources.list.d/*azure-cli*; do
+            if [ -e "$source" ]; then
+              sudo mv "$source" "$source.disabled"
+            fi
+          done
+          sudo apt-get update
+        fi
 
-        sudo apt-get install --no-install-recommends
-        ${{ fromJSON(inputs.gcc-multilib) && 'gcc-multilib' || '' }}
-        ${{ fromJSON(inputs.musl-tools) && 'musl-tools' || '' }}
-        ${{ fromJSON(inputs.clang) && 'clang' || '' }}
-        ${{ fromJSON(inputs.gcc-aarch64-linux-gnu) && 'gcc-aarch64-linux-gnu linux-libc-dev-arm64-cross libc6-dev-arm64-cross' || '' }}
+        packages=()
+        if [[ "$GCC_MULTILIB" == "true" ]]; then
+          packages+=(gcc-multilib)
+        fi
+        if [[ "$MUSL_TOOLS" == "true" ]]; then
+          packages+=(musl-tools)
+        fi
+        if [[ "$CLANG" == "true" ]]; then
+          packages+=(clang)
+        fi
+        if [[ "$GCC_AARCH64_LINUX_GNU" == "true" ]]; then
+          packages+=(gcc-aarch64-linux-gnu linux-libc-dev-arm64-cross libc6-dev-arm64-cross)
+        fi
+
+        if ((${#packages[@]})); then
+          sudo apt-get install --no-install-recommends "${packages[@]}"
+        fi
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -49,7 +49,7 @@
 flamescope = { version = "0.1.2", optional = true }

 rustls = { workspace = true, optional = true }
 rustls-graviola = { workspace = true, optional = true }

 [target.'cfg(windows)'.dependencies]
 libc = { workspace = true }
@@ -183,19 +183,11 @@
 rustpython-wtf8 = { path = "crates/wtf8", version = "0.5.0" }
 rustpython-doc = { path = "crates/doc", version = "0.5.0" }
 
-# Use RustPython-packaged Ruff crates from the published fork while keeping
-# existing crate names in the codebase.
-ruff_python_parser = { package = "rustpython-ruff_python_parser", version = "0.15.8" }
-ruff_python_ast = { package = "rustpython-ruff_python_ast", version = "0.15.8" }
-ruff_text_size = { package = "rustpython-ruff_text_size", version = "0.15.8" }
-ruff_source_file = { package = "rustpython-ruff_source_file", version = "0.15.8" }
-# To update ruff crates, comment out the above lines and uncomment the following lines to pull directly from the Ruff repository at the specified commit hash.
-# Ruff tag 0.15.8 is based on commit c2a8815842f9dc5d24ec19385eae0f1a7188b0d9
-# at the time of this capture. We use the commit hash to ensure reproducible builds.
-# ruff_python_parser = { git = "https://github.com/astral-sh/ruff.git", rev = "c2a8815842f9dc5d24ec19385eae0f1a7188b0d9" }
-# ruff_python_ast = { git = "https://github.com/astral-sh/ruff.git", rev = "c2a8815842f9dc5d24ec19385eae0f1a7188b0d9" }
-# ruff_text_size = { git = "https://github.com/astral-sh/ruff.git", rev = "c2a8815842f9dc5d24ec19385eae0f1a7188b0d9" }
-# ruff_source_file = { git = "https://github.com/astral-sh/ruff.git", rev = "c2a8815842f9dc5d24ec19385eae0f1a7188b0d9" }
+# Use the RustPython Ruff fork for RustPython public `_ast` metadata.
+ruff_python_parser = { package = "rustpython-ruff_python_parser", git = "https://github.com/RustPython/ruff.git", tag = "0.15.19-rustpython" }
+ruff_python_ast = { package = "rustpython-ruff_python_ast", git = "https://github.com/RustPython/ruff.git", tag = "0.15.19-rustpython" }
+ruff_text_size = { package = "rustpython-ruff_text_size", git = "https://github.com/RustPython/ruff.git", tag = "0.15.19-rustpython" }
+ruff_source_file = { package = "rustpython-ruff_source_file", git = "https://github.com/RustPython/ruff.git", tag = "0.15.19-rustpython" }
 
 der = { version = "0.8", features = ["alloc", "oid", "pem", "zeroize"] }
 phf = { version = "0.13.1", default-features = false, features = ["macros"]}
@@ -311,6 +303,7 @@
 textwrap = { version = "0.16.2", default-features = false }
 termios = "0.3.3"
 thiserror = "2.0"
+thin-vec = "0.2.14"
 timsort = "0.1.2"
 tk-sys = { git = "https://github.com/arihant2math/tkinter.git", tag = "v0.2.0" }
 icu_casemap = "2"

diff --git a/Lib/test/test_ast/test_ast.py b/Lib/test/test_ast/test_ast.py
@@ -150,7 +150,6 @@ def test_parse_invalid_ast(self):
             self.assertRaises(TypeError, ast.parse, ast.Constant(42),
                               optimize=optval)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; ValueError: compile() unrecognized flags
     def test_optimization_levels__debug__(self):
         cases = [(-1, '__debug__'), (0, '__debug__'), (1, False), (2, False)]
         for (optval, expected) in cases:
@@ -586,7 +585,6 @@ def test_invalid_sum(self):
             compile(m, "<test>", "exec")
         self.assertIn("but got expr()", str(cm.exception))
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; ValueError: expected str for name
     def test_invalid_identifier(self):
         m = ast.Module([ast.Expr(ast.Name(42, ast.Load()))], [])
         ast.fix_missing_locations(m)
@@ -1365,7 +1363,6 @@ def test_replace_ignore_known_custom_instance_fields(self):
         self.assertIs(repl.ctx, context)
         self.assertRaises(AttributeError, getattr, repl, 'extra')
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: "Name\.__replace__\ missing\ 1\ keyword\ argument:\ 'id'\." does not match "replace() does not support Name objects"
     def test_replace_reject_missing_field(self):
         # case: warn if deleted field is not replaced
         node = ast.parse('x').body[0].value
@@ -1700,7 +1697,6 @@ def check_text(code, empty, full, **kwargs):
             full="Module(body=[Import(names=[alias(name='_ast', asname='ast')]), ImportFrom(module='module', names=[alias(name='sub')], level=0)], type_ignores=[])",
         )
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; ?                                              ^^^^^^^^^                                                                                  ^^^^^^^^^
     def test_copy_location(self):
         src = ast.parse('1 + 1', mode='eval')
         src.body.right = ast.copy_location(ast.Constant(2), src.body.right)
@@ -1737,7 +1733,6 @@ def test_fix_missing_locations(self):
             "end_col_offset=0), lineno=1, col_offset=0, end_lineno=1, end_col_offset=0)])"
         )
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; ?                                              ^^^^^^^^^                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     def test_increment_lineno(self):
         src = ast.parse('1 + 1', mode='eval')
         self.assertEqual(ast.increment_lineno(src, n=3), src)
@@ -1959,7 +1954,6 @@ def test_literal_eval_syntax_errors(self):
                 (\
             \ ''')
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: required field "lineno" missing from alias
     def test_bad_integer(self):
         # issue13436: Bad error message with invalid numeric values
         body = [ast.ImportFrom(module='time',
@@ -3259,7 +3253,6 @@ class MyAttrs(ast.AST):
                                    r"MyAttrs.__init__ got an unexpected keyword argument 'c'."):
             obj = MyAttrs(c=3)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; DeprecationWarning not triggered
     def test_fields_and_types_no_default(self):
         class FieldsAndTypesNoDefault(ast.AST):
             _fields = ('a',)
@@ -3273,7 +3266,6 @@ class FieldsAndTypesNoDefault(ast.AST):
         obj = FieldsAndTypesNoDefault(a=1)
         self.assertEqual(obj.a, 1)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; DeprecationWarning not triggered
     def test_incomplete_field_types(self):
         class MoreFieldsThanTypes(ast.AST):
             _fields = ('a', 'b')
@@ -3293,7 +3285,6 @@ class MoreFieldsThanTypes(ast.AST):
         self.assertEqual(obj.a, 1)
         self.assertEqual(obj.b, 2)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: Expected type 'str' but 'bytes' found.
     def test_malformed_fields_with_bytes(self):
         class BadFields(ast.AST):
             _fields = (b'\xff'*64,)
@@ -3713,7 +3704,6 @@ def assert_ast(self, code, non_optimized_target, optimized_target):
             f"{ast.dump(optimized_tree)}",
         )
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; ValueError: compile() unrecognized flags
     def test_folding_format(self):
         code = "'%s' % (a,)"
 

diff --git a/Lib/test/test_audit.py b/Lib/test/test_audit.py
@@ -77,7 +77,6 @@ def test_monkeypatch(self):
     def test_open(self):
         self.do_test("test_open", os_helper.TESTFN)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_cantrace(self):
         self.do_test("test_cantrace")
 

diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
@@ -486,7 +486,6 @@ def test_compile_top_level_await_no_coro(self):
                                 msg=f"source={source} mode={mode}")
 
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_compile_top_level_await(self):
         """Test whether code with top level await can be compiled.
 
@@ -627,7 +626,6 @@ def test_compile_async_generator(self):
         exec(co, glob)
         self.assertEqual(type(glob['ticker']()), AsyncGeneratorType)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: <_ast.Name object at 0xb40000731e3d1360> is not an instance of <class '_ast.Constant'>
     def test_compile_ast(self):
         args = ("a*__debug__", "f.py", "exec")
         raw = compile(*args, flags = ast.PyCF_ONLY_AST).body[0]
@@ -1020,7 +1018,6 @@ def test_exec_redirected(self):
         finally:
             sys.stdout = savestdout
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: Unexpected keyword argument closure
     def test_exec_closure(self):
         def function_without_closures():
             return 3 * 5

diff --git a/Lib/test/test_cmd_line_script.py b/Lib/test/test_cmd_line_script.py
@@ -645,7 +645,6 @@ def test_syntaxerror_indented_caret_position(self):
             self.assertNotIn("\f", text)
             self.assertIn("\n    1 + 1 = 2\n    ^^^^^\n", text)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_syntaxerror_multi_line_fstring(self):
         script = 'foo = f"""{}\nfoo"""\n'
         with os_helper.temp_dir() as script_dir:

diff --git a/Lib/test/test_codeop.py b/Lib/test/test_codeop.py
@@ -279,7 +279,6 @@ def test_filename(self):
         self.assertNotEqual(compile_command("a = 1\n", "abc").co_filename,
                             compile("a = 1\n", "def", 'single').co_filename)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: 0 != 2
     def test_warning(self):
         # Test that the warning is only returned once.
         with warnings_helper.check_warnings(