https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108168
Bug ID: 108168
Summary: ICE in a simple module that almost any change
eliminates
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: urbanjost at comcast dot net
Target Milestone: ---
Extracted a reproducer that is only a few lines from a large module, but do not
see what is going on. Even moving the order of the subroutines, declaring i in
the subroutine instead of the top of the module, or just about any change
eliminates the problem, and it does not occur on my machine with version 10 of
gfortran.
module m_module
integer :: i
contains
subroutine subaaa()
do i=1,2
call subbbb()
enddo
end subroutine subaaa
subroutine subbbb()
call random_number(r)
end subroutine subbbb
subroutine subccc()
call subaaa()
end subroutine subccc
end module m_module
gfortran -c M_module.f90
951: internal compiler error: Segmentation fault
0x14f925f1108f ???
/build/glibc-SzIz7B/glibc-2.31/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x14f925ef2082 __libc_start_main
../csu/libc-start.c:308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-11/README.Bugs> for instructions.
gfortran --version
GNU Fortran (Ubuntu 11.1.0-1ubuntu1~20.04) 11.1.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Linux mercury 5.4.0-132-generic #148-Ubuntu SMP Mon Oct 17 16:02:06 UTC 2022
x86_64 x86_64 x86_64 GNU/Linux
