Crash in ifx 2026.0.0 Build 20260331

[vansnyder]

Describe the bug

ifx -c -O3 -fp-model fast -g -traceback -I -I/home/vsnyder/progs/Burkardt/Fem2D_Poisson_CG_OO/ifx -parallel -check -check noarg_temp_created ../Invert_Design.f90 -I/home/vsnyder/progs/Burkardt/Fem2D_Poisson_CG_OO/ifx
-I/home/vsnyder/subs/eggx-0.95/eggx-procall-2003/ifx -I/home/vsnyder/subs/triangle/ifx -I..
ifx: warning #10182: disabling optimization; runtime debug checks enabled
#0 0x00000000033517b1
#1 0x00000000033b6f87
#2 0x00000000033a28ba
#3 0x00000000032cd482
#4 0x00000000032cd372
#5 0x000000000345fece
#6 0x0000000003461a25
#7 0x0000000003465951
#8 0x00000000034667ba
#9 0x000000000345cb1b
#10 0x000000000345e141
#11 0x000000000345aec8
#12 0x00000000033c1ee3
#13 0x00000000033c05c1
#14 0x000000000338ec86
#15 0x000000000338f9d6
#16 0x000000000338b1e5
#17 0x000000000338d1ce
#18 0x0000000003405581
#19 0x0000000003405ab7
#20 0x00000000034085b7
#21 0x0000000003405581
#22 0x0000000003405ab7
#23 0x00000000034085b7
#24 0x0000000003405581
#25 0x000000000340295e
#26 0x0000000003405581
#27 0x000000000329607d
#28 0x0000000003295a24
#29 0x0000000003476d9a
#30 0x00007f9c25913ca8
#31 0x00007f9c25913d65 __libc_start_main + 133
#32 0x00000000030d09ee

../Invert_Design.f90(782): error #5623: Internal compiler error: internal abort Please report this error along with the circumstances in which it occurred in a Software Problem Report. Note: File and line given may not be explicit cause of this error.
do i = 1, size(p%element_node,2)
---------------------^
compilation aborted for ../Invert_Design.f90 (code 3)
make: *** [../Make.guts:28: Invert_Design.o] Error 3

I added a default-initialized array component to a derived type — not the component referenced in the crash.

integer :: Layers(2) = [ 1, 2 ]

My code doesn't use it yet. If I comment it out, the crash doesn't occur. The forum page refused to upload files. Let me know where to send them.

/opt/intel/oneapi/compiler/2026.0/bin/ifx -V

Intel(R) Fortran Compiler for applications running on Intel(R) 64, Version 2026.0.0 Build 20260331

uname -a

Linux Blue 6.12.74+deb13+1-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.74-2 (2026-03-08) x86_64 GNU/Linux

To reproduce

IFX-crash.txt

1. Include a code snippet that is as short as possible
2. Specify the command which should be used to compile the program
3. Specify the command which should be used to launch the program
4. Indicate what is wrong and what was expected

Environment

• OS: [e.g Windows/Linux]
• Target device and vendor: [e.g. Intel GPU]
• DPC++ version: [e.g. commit hash or output of clang++ --version]
• Dependencies version: [e.g. the output of sycl-ls --verbose]

Additional context

[KornevNikita]

hi @vansnyder, unfortunately we don't support ifx here. Could you please post your question to https://community.intel.com/t5/Intel-Fortran-Compiler/bd-p/fortran-compiler?