Fix for find_children() with stacks #2145

Job	Run time
cpp_build (ubuntu-22.04)	1m 59s
py_build_test (ubuntu-22.04, 3.7)	43s
cpp_build (windows-2022)	2m 35s
py_build_test (ubuntu-22.04, 3.8)	36s
cpp_build (macos-12)	3m 49s
py_build_test (ubuntu-22.04, 3.9)	30s
cpp_build (macos-14)	2m 17s
py_build_test (ubuntu-22.04, 3.10)	34s
py_build_test (ubuntu-22.04, 3.11)	28s
py_build_test (ubuntu-22.04, 3.12)	26s
py_build_test (windows-2022, 3.7)	30s
py_build_test (windows-2022, 3.8)	28s
py_build_test (windows-2022, 3.9)	30s
py_build_test (windows-2022, 3.10)	30s
py_build_test (windows-2022, 3.11)	27s
py_build_test (windows-2022, 3.12)	29s
py_build_test (macos-12, 3.7)	44s
py_build_test (macos-12, 3.8)	41s
py_build_test (macos-12, 3.9)	42s
py_build_test (macos-12, 3.10)	45s
py_build_test (macos-12, 3.11)	42s
py_build_test (macos-12, 3.12)	43s
py_build_test (macos-14, 3.10)	37s
py_build_test (macos-14, 3.11)	33s
py_build_test (macos-14, 3.12)	32s
py_build_test (windows-2022, mingw64, msys2)	26s
package_sdist	0s
package_wheels	0s
	23m 16s

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