IFX (Intel® Fortran Compiler 2023.1.0) Internal compiler error - sample code

[ZlamalJakub]

Attached project cause Internal compiler error when compiled with IFX. IFORT is OK.

It is quite old code previously compiled using IFORT.

I am not able to report error in Support, so I am trying this way.

[andrew_4619]

I opened your project and did a build which  was by default a 64bit build. It does indeed ICE which is a bug.

I will note that the interface  for MouseHookWndProc does not match the implementation and that the implementation does not have the arguments correctly defined for a callback. If use are using IFWINTY (DFWINTY is the same but and older name) then:

integer :: nCode
integer(fwparam) :: wParam ! 32 bit
integer(flparam) :: lParam ! 32/64 bit from

If I correct that it compiles without and ICE. The interface checking should have maybe kicked and generated and error.

[ZlamalJakub]

Interface to MouseHookWndProc was manually added by hand to sample code to obtain the smallest code which crashes compiler. It is correctly defined in another big module (module EODInterfaces) which contains interfaces to all routines.

Thank you for your comment.

[andrew_4619]

Just to be clear the declarations of the args in MouseHookWndProc were incorrect, it would be ok in a 32 bit built  but not in a 64 bit build. The interface was also wrong in  in that the declarations were not correct but also in that they were different to the actual  routine.  It would make more sense to put those external subroutines into a module and save having to supply the interfaces explicitly. 

[Devorah_H_Intel]

Thank you for your report. The ICE will be fixed in the next compiler release. 

[ZlamalJakub]

Update 2023.2.0 of IFX compiler is able to compile sample code wirthout error.