Cannot load __log_finite from libm.so.6 with ctypes

Question

I'm trying to load the function __log_finite from libm.so.6 using ctypes.

If I run nm on the library I can see that the symbol refers to an indirect function (https://sourceware.org/binutils/docs/binutils/nm.html).

nm -gD libm.so.6 | grep __log_finite
000000000002c520 i __log_finite

When I try to load this function with ctypes from python I get an error that suggests that the symbol is not defined:

import ctypes
lib = types.CDLL("/usr/lib/x86_64-linux-gnu/libm.so.6")
func = lib.__log_finite

raises:

AttributeError: /usr/lib/x86_64-linux-gnu/libm.so.6: undefined symbol: __log_finite

If I try to load any other non-indirect function, I do not get this error:

nm -gD libm.so.6 | grep roundevenl
000000000001cc20 W roundevenl

func = lib.roundevenl
print(func)

outputs

<_FuncPtr object at 0x7fbea6820400>

I'm wondering what is going on here and the reason for this behavior. Is this related to __log_finite or to all the indirect functions?

NOTE: this issue does not seem related to the indirect function but to the finite suffix: I'm not able to load any *_finite function (e.g., __acos_finite, __expf_finite...)