The code below causes an Internal Compiler Error. The problem may be a compiler regression, see https://community.intel.com/t5/Intel-Fortran-Compiler/zero-sized-derived-type-array-constructor/m-p/1378487#M161033 from 2022
ijb87_local@SCLT517LINUX:~/test$ cat t.f90
Program test
Implicit None( Type, External )
Type a_t
End type a_t
Type( a_t ), Dimension( : ), Allocatable :: t_arr
Integer, Dimension( : ), Allocatable :: i_arr
i_arr = [ Integer :: ]
t_arr = [ a_t :: ]
End Program test
ijb87_local@SCLT517LINUX:~/test$ ifx --version
ifx (IFX) 2026.1.1 20260724
Copyright (C) 1985-2026 Intel Corporation. All rights reserved.
ijb87_local@SCLT517LINUX:~/test$ ifx t.f90
#0 0x00006022807f7d54
#1 0x0000602280860a07
#2 0x000060228084b68a
#3 0x00006022807a05f8
#4 0x0000602280743a31
#5 0x000060228073a84e
#6 0x000060228083638b
#7 0x000060228083717a
#8 0x000060228073e025
#9 0x00006022808a575e
#10 0x00006022808afb71
#11 0x00006022808b00ab
#12 0x00006022808b2cf9
#13 0x00006022808afb71
#14 0x00006022808acf2e
#15 0x00006022808afb71
#16 0x0000602280735aad
#17 0x000060228073546f
#18 0x0000602280924d46
#19 0x0000757a9d82a1ca
#20 0x0000757a9d82a28b __libc_start_main + 139
#21 0x000060228056d33e
t.f90(14): 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.
t_arr = [ a_t :: ]
------------^
compilation aborted for t.f90 (code 3)
ijb87_local@SCLT517LINUX:~/test$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 24.04.5 LTS
Release: 24.04
Codename: noble
ijb87_local@SCLT517LINUX:~/test$
