[Bug c++/107539] internal compiler error: same canonical type node for different types

[franckbehaghel_gcc at protonmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107539

--- Comment #1 from Franck Behaghel <franckbehaghel_gcc at protonmail dot com> 
---
Created attachment 53836
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53836&action=edit
main.cpp

reduced testcase :

g++ main.cpp 
main.cpp: In lambda function:
main.cpp:222:61: internal compiler error: same canonical type node for
different types ‘AlgorithmTemplate<typename decltype (algorithm)::type>’ and
‘AlgorithmTemplate<typename decltype (algorithm)::type>’
  222 |             visitor (identity<AlgorithmTemplate<NewAlgorithm>> ());
      |                                                             ^~