fix a reference leak for non-simple conditions in boolean and/or expressions

CHANGES.rst

@@ -16,6 +16,8 @@ Features added
 Bugs fixed
 ----------
 
+* Reference leak for non-simple Python expressions in boolean and/or expressions.
+
 * ``getitimer()``, ``setitimer()``, ``gettimeofday()`` and related type/constant
   definitions were moved from ``posix/time.pxd`` to ``posix/sys_time.pxd`` to
   fix a naming collision.

Cython/Compiler/ExprNodes.py

@@ -10039,19 +10039,29 @@ class BoolBinopResultNode(ExprNode):
         self.arg.generate_evaluation_code(code)
         if and_label or or_label:
             test_result, uses_temp = self.generate_operand_test(code)
+            if uses_temp and (and_label and or_label):
+                # cannot become final result => free early
+                # disposal: uses_temp and (and_label and or_label)
+                self.arg.generate_disposal_code(code)
             sense = '!' if or_label else ''
             code.putln("if (%s%s) {" % (sense, test_result))
             if uses_temp:
                 code.funcstate.release_temp(test_result)
+            if not uses_temp or not (and_label and or_label):
+                # disposal: (not uses_temp) or {not (and_label and or_label) [if]}
                 self.arg.generate_disposal_code(code)
 
             if or_label and or_label != fall_through:
                 # value is false => short-circuit to next 'or'
                 code.put_goto(or_label)
-            if and_label and and_label != fall_through:
+            if and_label:
                 # value is true => go to next 'and'
                 if or_label:
                     code.putln("} else {")
+                    if not uses_temp:
+                        # disposal: (not uses_temp) and {(and_label and or_label) [else]}
+                        self.arg.generate_disposal_code(code)
+                if and_label != fall_through:
                     code.put_goto(and_label)
 
         if not and_label or not or_label:
@@ -10062,6 +10072,7 @@ class BoolBinopResultNode(ExprNode):
             self.value.make_owned_reference(code)
             code.putln("%s = %s;" % (final_result_temp, self.value.result()))
             self.value.generate_post_assignment_code(code)
+            # disposal: {not (and_label and or_label) [else]}
             self.arg.generate_disposal_code(code)
             self.value.free_temps(code)
             if end_label != fall_through:

tests/run/boolop.pyx

-def foo(obj1, obj2, obj3, obj4, obj5):
+
+def simple_values(obj1, obj2, obj3, obj4):
     """
-    >>> foo(True, False, 23, 'test', 1)
+    >>> simple_values(True, False, 23, 'test')
     (0.0, 1.0, False, False)
     """
     cdef int bool1, bool2
@@ -22,3 +23,29 @@ def foo(obj1, obj2, obj3, obj4, obj5):
     obj4 = obj1 and obj2 and obj3
     obj5 = (obj1 + obj2 + obj3) and obj4
     return bool3, bool4, obj4, obj5
+
+
+def non_simple_values(obj1, obj2, obj3, obj4):
+    """
+    >>> non_simple_values(1, 2, 3, 4)
+    (7, 3, 7, 3, 7, 7, 5, 5)
+    >>> non_simple_values(0, 0, 3, 4)
+    (0, 7, 4, 4, 4, 4, 4, 4)
+    >>> non_simple_values(0, 0, 1, -1)
+    (0, 0, -1, 0, -1, -1, 0, 0)
+    >>> non_simple_values(1, -1, 1, -1)
+    (0, 0, 0, 0, 0, 0, 0, 0)
+    >>> non_simple_values(1, 2, 1, -1)
+    (0, 3, 0, 3, 0, 0, 1, 1)
+    >>> non_simple_values(2, 1, 1, -1)
+    (0, 3, 1, 3, 0, 0, 1, 1)
+    """
+    and1 = obj1 + obj2 and obj3 + obj4
+    or1 = obj1 + obj2 or obj3 + obj4
+    and_or = obj1 + obj2 and obj3 + obj4 or obj1 + obj4
+    or_and = obj1 + obj2 or obj3 + obj4 and obj1 + obj4
+    and_or_and = obj1 + obj2 and obj3 + obj4 or obj1 + obj4 and obj2 + obj4
+    and1_or_and = (and1 or (obj1 + obj4 and obj2 + obj4))
+    or_and_or = (obj1 + obj2 or obj3 + obj4) and (obj1 + obj4 or obj2 + obj4)
+    or1_and_or = (or1 and (obj1 + obj4 or obj2 + obj4))
+    return (and1, or1, and_or, or_and, and_or_and, and1_or_and, or_and_or, or1_and_or)

tests/run/boolop_py.py

+
+def non_simple_values(obj1, obj2, obj3, obj4):
+    """
+    >>> non_simple_values(1, 2, 3, 4)
+    (7, 3, 7, 3, 7, 7, 5, 5)
+    >>> non_simple_values(0, 0, 3, 4)
+    (0, 7, 4, 4, 4, 4, 4, 4)
+    >>> non_simple_values(0, 0, 1, -1)
+    (0, 0, -1, 0, -1, -1, 0, 0)
+    >>> non_simple_values(1, -1, 1, -1)
+    (0, 0, 0, 0, 0, 0, 0, 0)
+    >>> non_simple_values(1, 2, 1, -1)
+    (0, 3, 0, 3, 0, 0, 1, 1)
+    >>> non_simple_values(2, 1, 1, -1)
+    (0, 3, 1, 3, 0, 0, 1, 1)
+    """
+    and1 = obj1 + obj2 and obj3 + obj4
+    or1 = obj1 + obj2 or obj3 + obj4
+    and_or = obj1 + obj2 and obj3 + obj4 or obj1 + obj4
+    or_and = obj1 + obj2 or obj3 + obj4 and obj1 + obj4
+    and_or_and = obj1 + obj2 and obj3 + obj4 or obj1 + obj4 and obj2 + obj4
+    and1_or_and = (and1 or (obj1 + obj4 and obj2 + obj4))
+    or_and_or = (obj1 + obj2 or obj3 + obj4) and (obj1 + obj4 or obj2 + obj4)
+    or1_and_or = (or1 and (obj1 + obj4 or obj2 + obj4))
+    return (and1, or1, and_or, or_and, and_or_and, and1_or_and, or_and_or, or1_and_or)