some instructions in __annotate__ have incorrect code positions

Bug report

Bug description:

The following code shows the incorrect positions:

from dis import Bytecode

src = """\
22
333
__dataclass_fields__: ClassVar
"""

code = compile(src, "<string>", "exec")
print(code.co_consts)
annotate_code = code.co_consts[1]

for bc in Bytecode(annotate_code):
    print(bc.positions, bc.opname)

output (Python 3.14.0b3+):

(0, <code object __annotate__ at 0x7fcda674f940, file "<string>", line 1>, None)
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=0) RESUME       
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) LOAD_FAST_BORROW         # incorrect
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) LOAD_SMALL_INT           # incorrect
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) COMPARE_OP               # incorrect
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) POP_JUMP_IF_FALSE        # incorrect
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) NOT_TAKEN                # incorrect
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) LOAD_COMMON_CONSTANT     # incorrect
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) RAISE_VARARGS            # incorrect
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) BUILD_MAP                # incorrect
Positions(lineno=3, end_lineno=3, col_offset=0, end_col_offset=30) LOAD_SMALL_INT
Positions(lineno=3, end_lineno=3, col_offset=0, end_col_offset=30) LOAD_GLOBAL
Positions(lineno=3, end_lineno=3, col_offset=0, end_col_offset=30) CONTAINS_OP
Positions(lineno=3, end_lineno=3, col_offset=0, end_col_offset=30) POP_JUMP_IF_FALSE
Positions(lineno=3, end_lineno=3, col_offset=0, end_col_offset=30) NOT_TAKEN
Positions(lineno=3, end_lineno=3, col_offset=22, end_col_offset=30) LOAD_GLOBAL
Positions(lineno=3, end_lineno=3, col_offset=0, end_col_offset=30) COPY
Positions(lineno=3, end_lineno=3, col_offset=0, end_col_offset=30) LOAD_CONST
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) STORE_SUBSCR
Positions(lineno=1, end_lineno=1, col_offset=0, end_col_offset=2) RETURN_VALUE

The statements after RESUME have the position of the first ast-node in the module. I think it would be correct if they had the same code position as RESUME. I assume they are part of a general code that is part of every __annotate__ and are not associated with a specific ast-node.

I hope this can be fixed, as it makes it difficult for projects like executing to work with these code locations.

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Linked PRs

• gh-135814
• gh-136543

Beginne mit dem bereitgestellten Reproducer für Python 3.14 unter Verwendung von dis.Bytecode und untersuche, wie Codepositionen für annotate zugewiesen werden. Vergleiche die Anweisungen nach RESUME mit dem im Bericht beschriebenen erwarteten Verhalten der Positionen; abgeschlossen ist die Aufgabe, wenn die allgemeinen Anweisungen nicht mehr die Position des ersten AST-Knotens übernehmen. Die verknüpften PRs gh-135814 und gh-136543 zeigen, dass diese Arbeit bereits im Gange ist.