GH-96793: Change `FOR_ITER` to not pop the iterator on exhaustion. (GH-96801)

Change FOR_ITER to have the same stack effect regardless of whether it branches or not.
Performance is unchanged as FOR_ITER (and specialized forms jump over the cleanup code).

4 files changed, 101 insertions, 94 deletions

diff --git a/Lib/importlib/_bootstrap_external.py b/Lib/importlib/_bootstrap_external.py
index fc50e705..9c14f71 100644
--- a/Lib/importlib/_bootstrap_external.py
+++ b/Lib/importlib/_bootstrap_external.py
@@ -423,6 +423,7 @@ _code_type = type(_write_atomic.__code__)
 #     Python 3.12a1 3507 (Set lineno of module's RESUME to 0)
 #     Python 3.12a1 3508 (Add CLEANUP_THROW)
 #     Python 3.12a1 3509 (Conditional jumps only jump forward)
+#     Python 3.12a1 3510 (FOR_ITER leaves iterator on the stack)
 
 #     Python 3.13 will start with 3550
 
@@ -435,7 +436,7 @@ _code_type = type(_write_atomic.__code__)
 # Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
 # in PC/launcher.c must also be updated.
 
-MAGIC_NUMBER = (3509).to_bytes(2, 'little') + b'\r\n'
+MAGIC_NUMBER = (3510).to_bytes(2, 'little') + b'\r\n'
 
 _RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little')  # For import.c
 
diff --git a/Lib/opcode.py b/Lib/opcode.py
index 6909230..d655b0e 100644
--- a/Lib/opcode.py
+++ b/Lib/opcode.py
@@ -78,6 +78,8 @@ def_op('CACHE', 0)
 def_op('POP_TOP', 1)
 def_op('PUSH_NULL', 2)
 
+def_op('END_FOR', 4)
+
 def_op('NOP', 9)
 def_op('UNARY_POSITIVE', 10)
 def_op('UNARY_NEGATIVE', 11)
diff --git a/Lib/test/test__opcode.py b/Lib/test/test__opcode.py
index f548e36..704d19f 100644
--- a/Lib/test/test__opcode.py
+++ b/Lib/test/test__opcode.py
@@ -40,7 +40,7 @@ class OpcodeTests(unittest.TestCase):
         self.assertEqual(stack_effect(JUMP_IF_TRUE_OR_POP, 0, jump=False), -1)
         FOR_ITER = dis.opmap['FOR_ITER']
         self.assertEqual(stack_effect(FOR_ITER, 0), 1)
-        self.assertEqual(stack_effect(FOR_ITER, 0, jump=True), -1)
+        self.assertEqual(stack_effect(FOR_ITER, 0, jump=True), 1)
         self.assertEqual(stack_effect(FOR_ITER, 0, jump=False), 1)
         JUMP_FORWARD = dis.opmap['JUMP_FORWARD']
         self.assertEqual(stack_effect(JUMP_FORWARD, 0), 0)
diff --git a/Lib/test/test_dis.py b/Lib/test/test_dis.py
index 667b267..c986a6b 100644
--- a/Lib/test/test_dis.py
+++ b/Lib/test/test_dis.py
@@ -148,7 +148,8 @@ dis_bug708901 = """\
 
 %3d        JUMP_BACKWARD            4 (to 30)
 
-%3d     >> LOAD_CONST               0 (None)
+%3d     >> END_FOR
+           LOAD_CONST               0 (None)
            RETURN_VALUE
 """ % (bug708901.__code__.co_firstlineno,
        bug708901.__code__.co_firstlineno + 1,
@@ -699,7 +700,8 @@ Disassembly of <code object <listcomp> at 0x..., file "%s", line %d>:
            BINARY_OP                0 (+)
            LIST_APPEND              2
            JUMP_BACKWARD            9 (to 8)
-        >> RETURN_VALUE
+        >> END_FOR
+           RETURN_VALUE
 """ % (dis_nested_1,
        __file__,
        _h.__code__.co_firstlineno + 3,
@@ -748,7 +750,8 @@ dis_loop_test_quickened_code = """\
            POP_TOP
            JUMP_BACKWARD_QUICK     17 (to 16)
 
-%3d     >> LOAD_CONST               0 (None)
+%3d     >> END_FOR
+           LOAD_CONST               0 (None)
            RETURN_VALUE
 """ % (loop_test.__code__.co_firstlineno,
        loop_test.__code__.co_firstlineno + 1,
@@ -1566,97 +1569,98 @@ expected_opinfo_jumpy = [
   Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=1, argval=88, argrepr='to 88', offset=84, starts_line=None, is_jump_target=False, positions=None),
   Instruction(opname='JUMP_BACKWARD', opcode=140, arg=30, argval=28, argrepr='to 28', offset=86, starts_line=None, is_jump_target=False, positions=None),
   Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=88, starts_line=8, is_jump_target=True, positions=None),
-  Instruction(opname='JUMP_FORWARD', opcode=110, arg=13, argval=118, argrepr='to 118', offset=90, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=92, starts_line=10, is_jump_target=True, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=4, argval='I can haz else clause?', argrepr="'I can haz else clause?'", offset=104, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=106, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=116, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_FAST_CHECK', opcode=127, arg=0, argval='i', argrepr='i', offset=118, starts_line=11, is_jump_target=True, positions=None),
-  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=35, argval=192, argrepr='to 192', offset=120, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=122, starts_line=12, is_jump_target=True, positions=None),
-  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=134, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=136, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=146, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=148, starts_line=13, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=150, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='BINARY_OP', opcode=122, arg=23, argval=23, argrepr='-=', offset=152, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='STORE_FAST', opcode=125, arg=0, argval='i', argrepr='i', offset=156, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=158, starts_line=14, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=3, argval=6, argrepr='6', offset=160, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='COMPARE_OP', opcode=107, arg=4, argval='>', argrepr='>', offset=162, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=1, argval=172, argrepr='to 172', offset=168, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='JUMP_BACKWARD', opcode=140, arg=27, argval=118, argrepr='to 118', offset=170, starts_line=15, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=172, starts_line=16, is_jump_target=True, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=2, argval=4, argrepr='4', offset=174, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='COMPARE_OP', opcode=107, arg=0, argval='<', argrepr='<', offset=176, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=1, argval=186, argrepr='to 186', offset=182, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='JUMP_FORWARD', opcode=110, arg=16, argval=218, argrepr='to 218', offset=184, starts_line=17, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=186, starts_line=11, is_jump_target=True, positions=None),
-  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=1, argval=192, argrepr='to 192', offset=188, starts_line=None, is_jump_target=False, positions=None),
-   Instruction(opname='JUMP_BACKWARD', opcode=140, arg=35, argval=122, argrepr='to 122', offset=190, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=192, starts_line=19, is_jump_target=True, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=6, argval='Who let lolcatz into this test suite?', argrepr="'Who let lolcatz into this test suite?'", offset=204, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=206, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=216, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='NOP', opcode=9, arg=None, argval=None, argrepr='', offset=218, starts_line=20, is_jump_target=True, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=220, starts_line=21, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=7, argval=0, argrepr='0', offset=222, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='BINARY_OP', opcode=122, arg=11, argval=11, argrepr='/', offset=224, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=228, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=230, starts_line=25, is_jump_target=False, positions=None),
-  Instruction(opname='BEFORE_WITH', opcode=53, arg=None, argval=None, argrepr='', offset=232, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='STORE_FAST', opcode=125, arg=1, argval='dodgy', argrepr='dodgy', offset=234, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=236, starts_line=26, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=8, argval='Never reach this', argrepr="'Never reach this'", offset=248, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=250, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=260, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=262, starts_line=25, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=264, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='JUMP_FORWARD', opcode=110, arg=14, argval=120, argrepr='to 120', offset=90, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='END_FOR', opcode=4, arg=None, argval=None, argrepr='', offset=92, starts_line=3, is_jump_target=True, positions=None),
+  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=94, starts_line=10, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=4, argval='I can haz else clause?', argrepr="'I can haz else clause?'", offset=106, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=108, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=118, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_FAST_CHECK', opcode=127, arg=0, argval='i', argrepr='i', offset=120, starts_line=11, is_jump_target=True, positions=None),
+  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=35, argval=194, argrepr='to 194', offset=122, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=124, starts_line=12, is_jump_target=True, positions=None),
+  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=136, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=138, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=148, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=150, starts_line=13, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=152, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='BINARY_OP', opcode=122, arg=23, argval=23, argrepr='-=', offset=154, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='STORE_FAST', opcode=125, arg=0, argval='i', argrepr='i', offset=158, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=160, starts_line=14, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=3, argval=6, argrepr='6', offset=162, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='COMPARE_OP', opcode=107, arg=4, argval='>', argrepr='>', offset=164, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=1, argval=174, argrepr='to 174', offset=170, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='JUMP_BACKWARD', opcode=140, arg=27, argval=120, argrepr='to 120', offset=172, starts_line=15, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=174, starts_line=16, is_jump_target=True, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=2, argval=4, argrepr='4', offset=176, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='COMPARE_OP', opcode=107, arg=0, argval='<', argrepr='<', offset=178, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=1, argval=188, argrepr='to 188', offset=184, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='JUMP_FORWARD', opcode=110, arg=16, argval=220, argrepr='to 220', offset=186, starts_line=17, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=188, starts_line=11, is_jump_target=True, positions=None),
+  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=1, argval=194, argrepr='to 194', offset=190, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='JUMP_BACKWARD', opcode=140, arg=35, argval=124, argrepr='to 124', offset=192, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=194, starts_line=19, is_jump_target=True, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=6, argval='Who let lolcatz into this test suite?', argrepr="'Who let lolcatz into this test suite?'", offset=206, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=208, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=218, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='NOP', opcode=9, arg=None, argval=None, argrepr='', offset=220, starts_line=20, is_jump_target=True, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=222, starts_line=21, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=7, argval=0, argrepr='0', offset=224, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='BINARY_OP', opcode=122, arg=11, argval=11, argrepr='/', offset=226, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=230, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=232, starts_line=25, is_jump_target=False, positions=None),
+  Instruction(opname='BEFORE_WITH', opcode=53, arg=None, argval=None, argrepr='', offset=234, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='STORE_FAST', opcode=125, arg=1, argval='dodgy', argrepr='dodgy', offset=236, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=238, starts_line=26, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=8, argval='Never reach this', argrepr="'Never reach this'", offset=250, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=252, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=262, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=264, starts_line=25, is_jump_target=False, positions=None),
   Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=266, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='CALL', opcode=171, arg=2, argval=2, argrepr='', offset=268, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=278, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=280, starts_line=28, is_jump_target=True, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=10, argval="OK, now we're done", argrepr='"OK, now we\'re done"', offset=292, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=294, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=304, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=306, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='RETURN_VALUE', opcode=83, arg=None, argval=None, argrepr='', offset=308, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='PUSH_EXC_INFO', opcode=35, arg=None, argval=None, argrepr='', offset=310, starts_line=25, is_jump_target=False, positions=None),
-  Instruction(opname='WITH_EXCEPT_START', opcode=49, arg=None, argval=None, argrepr='', offset=312, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=1, argval=318, argrepr='to 318', offset=314, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='RERAISE', opcode=119, arg=2, argval=2, argrepr='', offset=316, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=318, starts_line=None, is_jump_target=True, positions=None),
-  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=320, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=322, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=268, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='CALL', opcode=171, arg=2, argval=2, argrepr='', offset=270, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=280, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=282, starts_line=28, is_jump_target=True, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=10, argval="OK, now we're done", argrepr='"OK, now we\'re done"', offset=294, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=296, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=306, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=308, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='RETURN_VALUE', opcode=83, arg=None, argval=None, argrepr='', offset=310, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='PUSH_EXC_INFO', opcode=35, arg=None, argval=None, argrepr='', offset=312, starts_line=25, is_jump_target=False, positions=None),
+  Instruction(opname='WITH_EXCEPT_START', opcode=49, arg=None, argval=None, argrepr='', offset=314, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=1, argval=320, argrepr='to 320', offset=316, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='RERAISE', opcode=119, arg=2, argval=2, argrepr='', offset=318, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=320, starts_line=None, is_jump_target=True, positions=None),
+  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=322, starts_line=None, is_jump_target=False, positions=None),
   Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=324, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='JUMP_BACKWARD', opcode=140, arg=24, argval=280, argrepr='to 280', offset=326, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='COPY', opcode=120, arg=3, argval=3, argrepr='', offset=328, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=330, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=332, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='PUSH_EXC_INFO', opcode=35, arg=None, argval=None, argrepr='', offset=334, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=4, argval='ZeroDivisionError', argrepr='ZeroDivisionError', offset=336, starts_line=22, is_jump_target=False, positions=None),
-  Instruction(opname='CHECK_EXC_MATCH', opcode=36, arg=None, argval=None, argrepr='', offset=348, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=16, argval=384, argrepr='to 384', offset=350, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=352, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=354, starts_line=23, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=9, argval='Here we go, here we go, here we go...', argrepr="'Here we go, here we go, here we go...'", offset=366, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=368, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=378, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=380, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='JUMP_BACKWARD', opcode=140, arg=52, argval=280, argrepr='to 280', offset=382, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='RERAISE', opcode=119, arg=0, argval=0, argrepr='', offset=384, starts_line=22, is_jump_target=True, positions=None),
-  Instruction(opname='COPY', opcode=120, arg=3, argval=3, argrepr='', offset=386, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=388, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=390, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='PUSH_EXC_INFO', opcode=35, arg=None, argval=None, argrepr='', offset=392, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=394, starts_line=28, is_jump_target=False, positions=None),
-  Instruction(opname='LOAD_CONST', opcode=100, arg=10, argval="OK, now we're done", argrepr='"OK, now we\'re done"', offset=406, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=408, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=418, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='RERAISE', opcode=119, arg=0, argval=0, argrepr='', offset=420, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='COPY', opcode=120, arg=3, argval=3, argrepr='', offset=422, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=424, starts_line=None, is_jump_target=False, positions=None),
-  Instruction(opname='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=426, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=326, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='JUMP_BACKWARD', opcode=140, arg=24, argval=282, argrepr='to 282', offset=328, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='COPY', opcode=120, arg=3, argval=3, argrepr='', offset=330, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=332, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=334, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='PUSH_EXC_INFO', opcode=35, arg=None, argval=None, argrepr='', offset=336, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=4, argval='ZeroDivisionError', argrepr='ZeroDivisionError', offset=338, starts_line=22, is_jump_target=False, positions=None),
+  Instruction(opname='CHECK_EXC_MATCH', opcode=36, arg=None, argval=None, argrepr='', offset=350, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=16, argval=386, argrepr='to 386', offset=352, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=354, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=356, starts_line=23, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=9, argval='Here we go, here we go, here we go...', argrepr="'Here we go, here we go, here we go...'", offset=368, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=370, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=380, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=382, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='JUMP_BACKWARD', opcode=140, arg=52, argval=282, argrepr='to 282', offset=384, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='RERAISE', opcode=119, arg=0, argval=0, argrepr='', offset=386, starts_line=22, is_jump_target=True, positions=None),
+  Instruction(opname='COPY', opcode=120, arg=3, argval=3, argrepr='', offset=388, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=390, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=392, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='PUSH_EXC_INFO', opcode=35, arg=None, argval=None, argrepr='', offset=394, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_GLOBAL', opcode=116, arg=3, argval='print', argrepr='NULL + print', offset=396, starts_line=28, is_jump_target=False, positions=None),
+  Instruction(opname='LOAD_CONST', opcode=100, arg=10, argval="OK, now we're done", argrepr='"OK, now we\'re done"', offset=408, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='CALL', opcode=171, arg=1, argval=1, argrepr='', offset=410, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=420, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='RERAISE', opcode=119, arg=0, argval=0, argrepr='', offset=422, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='COPY', opcode=120, arg=3, argval=3, argrepr='', offset=424, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=426, starts_line=None, is_jump_target=False, positions=None),
+  Instruction(opname='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=428, starts_line=None, is_jump_target=False, positions=None),
 ]
 
 # One last piece of inspect fodder to check the default line number handling