Segmentation fault en mode cpu with multiple allocations/to_numpy

[lyounes]

The following code running on Mac, Sequoia 15.5

#########################################
import taichi

ti_dtype = taichi.f32
taichi.init(arch=taichi.cpu, debug=True, default_fp=ti_dtype)

n = 1000
dim = 3

repeat = 1000
for k in range(repeat):
print(k)
x_ = taichi.Vector.field(dtype=ti_dtype, shape=(1000,), n=dim)
x_.fill(0.0)
x_.to_numpy()
############################################

triggers a segmentation fault. No error occurs is the allocation is out of the loop, or if to_numpy() is nt called.

Here is the output:

[Taichi] version 1.7.2, llvm 15.0.5, commit 0131dce, osx, python 3.12.8
[Taichi] Starting on arch=x64
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
[E 07/26/25 15:19:52.092 3514783] Received signal 11 (Segmentation fault: 11)

[E 07/26/25 15:19:52.092 3514770] Received signal 11 (Segmentation fault: 11)

                        * Taichi Core - Stack Traceback *                             

==========================================================================================
| Module | Offset | Function |
|----------------------------------------------------------------------------------------|

• taichi_python.cpython-312-darwin.so | 140 | taichi::Logger::error(std::_1::basic |
  | string<char, std::__1::char_traits, std |
  | ::__1::allocator> const&, bool) |
• taichi_python.cpython-312-darwin.so | 418 | taichi::(anonymous namespace)::signal_ |
  | handler(int) |

• libsystem_platform.dylib |      29 | (null)                                        |
  

==========================================================================================

Internal error occurred. Check out this page for possible solutions:
https://docs.taichi-lang.org/docs/install

                        * Taichi Core - Stack Traceback *                             

==========================================================================================
| Module | Offset | Function |
|----------------------------------------------------------------------------------------|

• taichi_python.cpython-312-darwin.so | 140 | taichi::Logger::error(std::_1::basic |
  | string<char, std::__1::char_traits, std |
  | ::__1::allocator> const&, bool) |
• taichi_python.cpython-312-darwin.so | 418 | taichi::(anonymous namespace)::signal_ |
  | handler(int) |

• libsystem_platform.dylib |      29 | (null)                                        |
  

==========================================================================================

Internal error occurred. Check out this page for possible solutions:
https://docs.taichi-lang.org/docs/install