Dataclass in file named 9.py fails compilation

[johanrex]

Bug Report

• File containing dataclass fails compilation if the module file name is a single number e.g. 9.py.
• Renaming the file to a9.py makes the compilation succeed.
• Removing the dataclass related stuff makes the compilation succeed.

To Reproduce

Create a new file named 9.py with this content:

from dataclasses import dataclass


@dataclass
class Map:
    foo: int


print("mypyc")

Compile the file.

mypyc 9.py

Expected Behavior

Successful compilation

Actual Behavior

(aoc_311) PS G:\git\adventofcode\2023> mypyc 9.py
running build_ext
building '9' extension
"C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\bin\HostX86\x64\cl.exe" /c /nologo /O2 /W3 /GL /DNDEBUG /MD -IC:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt -IC:\Users\johan\miniconda3\envs\aoc_311\include -IC:\Users\johan\miniconda3\envs\aoc_311\Include "-IC:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include" "-IC:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\ATLMFC\include" "-IC:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\VS\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.22621.0\\um" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.22621.0\\shared" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.22621.0\\winrt" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.22621.0\\cppwinrt" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um" /Tcbuild\__native.c /Fobuild\temp.win-amd64-cpython-311\Release\build\__native.obj /O2 /DEBUG:FASTLINK /wd4102 /wd4101 /wd4146
__native.c
C:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt\getargs.c(342): warning C4244: '=': conversion from 'Py_ssize_t' to 'int', possible loss of data
C:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt\getargsfast.c(449): warning C4244: '=': conversion from 'Py_ssize_t' to 'int', possible loss of data
C:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt\int_ops.c(288): warning C4244: 'function': conversion from 'Py_ssize_t' to 'int', possible loss of data
C:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt\int_ops.c(354): warning C4244: '=': conversion from 'Py_ssize_t' to 'digit', possible loss of data
C:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt\int_ops.c(696): warning C4244: 'return': conversion from 'long' to 'int16_t', possible loss of data
C:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt\int_ops.c(779): warning C4244: 'return': conversion from 'long' to 'uint8_t', possible loss of data
C:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt\float_ops.c(21): warning C4244: 'return': conversion from 'Py_ssize_t' to 'double', possible loss of data
C:\Users\johan\miniconda3\envs\aoc_311\Lib\site-packages\mypyc\lib-rt\misc_ops.c(682): warning C4244: 'function': conversion from 'Py_ssize_t' to 'int', possible loss of data
G:\git\adventofcode\2023\build\__native.h(16): error C2059: syntax error: 'bad suffix on number'
G:\git\adventofcode\2023\build\__native.h(16): error C2059: syntax error: 'constant'
build\__native.c(32): error C2059: syntax error: 'bad suffix on number'
build\__native.c(32): error C2143: syntax error: missing ')' before 'constant'
build\__native.c(32): error C2143: syntax error: missing '{' before 'constant'
build\__native.c(32): error C2059: syntax error: 'constant'
build\__native.c(32): error C2059: syntax error: ')'
build\__native.c(41): error C2059: syntax error: 'bad suffix on number'
build\__native.c(41): error C2143: syntax error: missing ')' before 'constant'
build\__native.c(41): error C2143: syntax error: missing '{' before 'constant'
build\__native.c(41): error C2059: syntax error: 'constant'
build\__native.c(41): error C2059: syntax error: ')'
build\__native.c(52): error C2059: syntax error: 'bad suffix on number'
build\__native.c(52): error C2143: syntax error: missing ')' before 'constant'
build\__native.c(52): error C2143: syntax error: missing '{' before 'constant'
build\__native.c(52): error C2059: syntax error: 'constant'
build\__native.c(52): error C2059: syntax error: ')'
build\__native.c(73): error C2059: syntax error: 'bad suffix on number'
build\__native.c(73): error C2143: syntax error: missing ')' before 'constant'
build\__native.c(73): error C2143: syntax error: missing '{' before 'constant'
build\__native.c(73): error C2059: syntax error: 'constant'
build\__native.c(73): error C2059: syntax error: ')'
build\__native.c(75): error C2059: syntax error: 'bad suffix on number'
build\__native.c(75): error C2143: syntax error: missing ')' before 'constant'
build\__native.c(75): error C2143: syntax error: missing '{' before 'constant'
build\__native.c(75): error C2059: syntax error: 'constant'
build\__native.c(75): error C2059: syntax error: ')'
build\__native.c(79): error C2065: 'Map_get_foo': undeclared identifier
build\__native.c(79): warning C4312: 'type cast': conversion from 'int' to 'getter' of greater size
build\__native.c(79): error C2065: 'Map_set_foo': undeclared identifier
build\__native.c(79): warning C4312: 'type cast': conversion from 'int' to 'setter' of greater size
build\__native.c(77): error C2099: initializer is not a constant
build\__native.c(94): error C2065: 'Map_dealloc': undeclared identifier
build\__native.c(94): warning C4312: 'type cast': conversion from 'int' to 'destructor' of greater size
build\__native.c(95): error C2065: 'Map_traverse': undeclared identifier
build\__native.c(95): warning C4312: 'type cast': conversion from 'int' to 'traverseproc' of greater size
build\__native.c(96): error C2065: 'Map_clear': undeclared identifier
build\__native.c(96): warning C4312: 'type cast': conversion from 'int' to 'inquiry' of greater size
build\__native.c(99): error C2059: syntax error: 'bad suffix on number'
build\__native.c(90): error C2099: initializer is not a constant
build\__native.c(100): warning C4047: 'initializing': 'PyBufferProcs *' differs in levels of indirection from 'unsigned long'
build\__native.c(98): warning C4047: 'initializing': 'Py_ssize_t' differs in levels of indirection from 'PyMethodDef *'
build\__native.c(97): warning C4047: 'initializing': 'iternextfunc' differs in levels of indirection from 'PyGetSetDef *'
build\__native.c(93): warning C4047: 'initializing': 'Py_ssize_t' differs in levels of indirection from 'PyObject *(__cdecl *)(PyTypeObject *,PyObject *,PyObject *)'
build\__native.c(107): error C2059: syntax error: 'bad suffix on number'
build\__native.c(107): error C2065: 'self': undeclared identifier
build\__native.c(107): warning C4552: '*': result of expression not used
build\__native.c(108): error C2065: 'self': undeclared identifier
build\__native.c(108): error C2059: syntax error: 'bad suffix on number'
build\__native.c(108): error C2059: syntax error: ')'
build\__native.c(109): error C2065: 'self': undeclared identifier
build\__native.c(109): warning C4047: '==': 'int' differs in levels of indirection from 'void *'
build\__native.c(111): error C2065: 'self': undeclared identifier
build\__native.c(111): error C2223: left of '->vtable' must point to struct/union
build\__native.c(112): error C2065: 'self': undeclared identifier
build\__native.c(112): error C2223: left of '->_foo' must point to struct/union
build\__native.c(113): error C2065: 'self': undeclared identifier
build\__native.c(113): warning C4312: 'type cast': conversion from 'int' to 'PyObject *' of greater size
build\__native.c(130): error C2059: syntax error: 'bad suffix on number'
build\__native.c(130): error C2143: syntax error: missing ')' before 'constant'
build\__native.c(130): error C2143: syntax error: missing '{' before 'constant'
build\__native.c(130): error C2059: syntax error: 'constant'
build\__native.c(130): error C2059: syntax error: ')'
build\__native.c(143): error C2059: syntax error: 'bad suffix on number'
build\__native.c(143): error C2143: syntax error: missing ')' before 'constant'
build\__native.c(143): error C2143: syntax error: missing '{' before 'constant'
build\__native.c(143): error C2059: syntax error: 'constant'
build\__native.c(143): error C2059: syntax error: ')'
error: command 'C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.38.33130\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
(aoc_311) PS G:\git\adventofcode\2023>

Your Environment

(aoc_311) PS G:\git\adventofcode\2023> python --version
Python 3.11.5
(aoc_311) PS G:\git\adventofcode\2023> mypy --version
mypy 1.7.1 (compiled: yes)

Let me know if you need any more details.