fix: Python3.12 now inlines comprehensions

2 files changed, 8 insertions, 3 deletions

diff --git a/coverage/env.py b/coverage/env.py
index bdc2c785..9f9b2553 100644
--- a/coverage/env.py
+++ b/coverage/env.py
@@ -137,6 +137,10 @@ class PYBEHAVIOR:
     # only a 0-number line, which is ignored, giving a truly empty module.
     empty_is_empty = (PYVERSION >= (3, 11, 0, "beta", 4))
 
+    # Are comprehensions inlined (new) or compiled as called functions (old)?
+    # Changed in https://github.com/python/cpython/pull/101441
+    comprehensions_are_functions = (PYVERSION <= (3, 12, 0, "alpha", 7, 0))
+
 # Coverage.py specifics.
 
 # Are we using the C-implemented trace function?
diff --git a/coverage/parser.py b/coverage/parser.py
index e653a9cc..e8d51a9b 100644
--- a/coverage/parser.py
+++ b/coverage/parser.py
@@ -1343,9 +1343,10 @@ class AstArcAnalyzer:
 
     _code_object__Lambda = _make_expression_code_method("lambda")
     _code_object__GeneratorExp = _make_expression_code_method("generator expression")
-    _code_object__DictComp = _make_expression_code_method("dictionary comprehension")
-    _code_object__SetComp = _make_expression_code_method("set comprehension")
-    _code_object__ListComp = _make_expression_code_method("list comprehension")
+    if env.PYBEHAVIOR.comprehensions_are_functions:
+        _code_object__DictComp = _make_expression_code_method("dictionary comprehension")
+        _code_object__SetComp = _make_expression_code_method("set comprehension")
+        _code_object__ListComp = _make_expression_code_method("list comprehension")
 
 
 # Code only used when dumping the AST for debugging.