ifx 2024.0 bug still there with 2024.2

[JFH]

This program compiles with ifx 2024.2 -check-all -standard-semantics but the memory sanitizer crashes it at run time.

```

! Free source form program initial9.f90 by J F Harper
implicit none
integer,parameter:: k1 = kind(1e0), k2 = kind(1d0), &
k3 = selected_real_kind(30)
real(k1) :: ni1(2), h1 = huge(ni1) ! ni is short for naninf
real(k2) :: ni2(2), h2 = huge(ni2)
real(k3) :: ni3(2), h3 = huge(ni3)
character(24) :: cni = 'NAN INF NAN INF NAN INF '
print "(A,3(1X,I0))",'Real kinds printed before nan_inf called:',k1,k2,k3
call testnaninf
contains
subroutine testnaninf
logical :: nanOK(3,2)
read(cni,*) ni1, ni2, ni3
nanOK(:,1) = [ ni1(1)/=ni1(1),ni2(1)/=ni2(1),ni3(1)/=ni3(1) ]
nanOK(:,2) = [ ni1(2) > h1 ,ni2(2) > h2 ,ni3(2) > h3 ]
write(*,"(A,3L2)") ' NaN/=NaN? ',nanOK(:,1),' Inf>huge? ',nanOK(:,2)
end subroutine testnaninf
end program

```

This is what happened when compiling and running  it in an x86_64 Ubuntu system:

```

(lf) john:~/Test$ /opt/intel/oneapi/compiler/2024.2/bin/ifx -check all -standard-semantics initial9.f90
(lf) john:~/Test$ ./a.out
Real kinds printed before nan_inf called: 4 8 16
==8352==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x5f8f74 in __gtq (/home/john/Test/a.out+0x5f8f74) (BuildId: 0c947e101bf23f02e341ec9b23a746ff84eb1896)
#1 0x40caaa in __for_ieee_signaling_gt_k16_ (/home/john/Test/a.out+0x40caaa) (BuildId: 0c947e101bf23f02e341ec9b23a746ff84eb1896)
#2 0x49c8ab in _unnamed_main$$_IP_testnaninf_ (/home/john/Test/a.out+0x49c8ab) (BuildId: 0c947e101bf23f02e341ec9b23a746ff84eb1896)
#3 0x49bac3 in MAIN__ (/home/john/Test/a.out+0x49bac3) (BuildId: 0c947e101bf23f02e341ec9b23a746ff84eb1896)
#4 0x40e338 in main (/home/john/Test/a.out+0x40e338) (BuildId: 0c947e101bf23f02e341ec9b23a746ff84eb1896)
#5 0x7f08d8c29d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#6 0x7f08d8c29e3f in __libc_start_main csu/../csu/libc-start.c:392:3
#7 0x40e204 in _start (/home/john/Test/a.out+0x40e204) (BuildId: 0c947e101bf23f02e341ec9b23a746ff84eb1896)

Uninitialized value was created by an allocation of 'mech_info' in the stack frame
#0 0x4da9d1 in for_write_seq_fmt_xmit (/home/john/Test/a.out+0x4da9d1) (BuildId: 0c947e101bf23f02e341ec9b23a746ff84eb1896)

SUMMARY: MemorySanitizer: use-of-uninitialized-value (/home/john/Test/a.out+0x5f8f74) (BuildId: 0c947e101bf23f02e341ec9b23a746ff84eb1896) in __gtq
Exiting
(lf) john:~/Test

```

[Devorah_H_Intel]

Thank you for reporting this. I reproduced it internally, and this issue has now been escalated to our Compiler engineering for a fix.  

[Devorah_H_Intel · Accepted solution]

@JFH Didn't you report this already here?

Compiler bugs take a few months to fix, sooner if you have Priority support.