Found the following significant warnings:
  ../include/nimble/NimArr.h:122:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:220:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:246:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:283:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:289:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:355:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:430:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:462:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:506:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:516:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:586:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:675:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:712:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:761:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:775:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:854:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:958:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1002:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1056:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1072:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1160:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1279:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1329:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1387:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1405:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1501:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1635:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1691:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1754:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1775:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../include/nimble/NimArr.h:1856:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:122:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:220:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:246:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:283:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:289:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:355:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:430:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:462:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:506:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:516:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:586:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:675:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:712:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:761:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:775:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:854:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:958:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1002:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1056:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1072:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1160:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1279:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1329:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1387:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1405:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1501:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1635:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1691:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1754:16: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1775:15: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  ../inst/include/nimble/NimArr.h:1856:3: warning: template-id not allowed for destructor in C++20 [-Wtemplate-id-cdtor]
See ‘/data/gannet/ripley/R/packages/tests-devel/nimble.Rcheck/00install.out’ for details.
* used C++ compiler: ‘g++-14 (GCC) 14.1.0’