gh-124960: Fixed barry_as_FLUFL future flag does not work in new REPL

Lib/_pyrepl/console.py

@@ -174,7 +174,7 @@ def _excepthook(self, typ, value, tb):
 
     def runsource(self, source, filename="<input>", symbol="single"):
         try:
-            tree = ast.parse(source)
+            tree = self.compile.compiler(source, filename, symbol, ast.PyCF_ONLY_AST)
         except (SyntaxError, OverflowError, ValueError):
             self.showsyntaxerror(filename, source=source)
             return False

Lib/codeop.py

@@ -44,6 +44,7 @@
 # Caveat emptor: These flags are undocumented on purpose and depending
 # on their effect outside the standard library is **unsupported**.
 PyCF_DONT_IMPLY_DEDENT = 0x200
+PyCF_ONLY_AST = 0x400
 PyCF_ALLOW_INCOMPLETE_INPUT = 0x4000
 
 def _maybe_compile(compiler, source, filename, symbol):
@@ -109,12 +110,14 @@ class Compile:
     def __init__(self):
         self.flags = PyCF_DONT_IMPLY_DEDENT | PyCF_ALLOW_INCOMPLETE_INPUT
 
-    def __call__(self, source, filename, symbol, **kwargs):
-        flags = self.flags
+    def __call__(self, source, filename, symbol, flags=0, **kwargs):
+        flags |= self.flags
         if kwargs.get('incomplete_input', True) is False:
             flags &= ~PyCF_DONT_IMPLY_DEDENT
             flags &= ~PyCF_ALLOW_INCOMPLETE_INPUT
         codeob = compile(source, filename, symbol, flags, True)
+        if flags & PyCF_ONLY_AST:
+            return compile(source, filename, symbol, flags, True)
         for feature in _features:
             if codeob.co_flags & feature.compiler_flag:
                 self.flags |= feature.compiler_flag

Misc/NEWS.d/next/Library/2024-10-05-15-49-53.gh-issue-124960.Bol9hT.rst

@@ -0,0 +1 @@
+Fix support for the ``barry_as_FLUFL`` future flag in the new REPL.