https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99169
Bug ID: 99169
Summary: Segfault when passing allocatable scalar into
intent(out) dummy argument
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: townsend at astro dot wisc.edu
Target Milestone: ---
Created attachment 50222
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50222&action=edit
Minimal working example
I've encountered a problem when passing an allocatable (and alread allocated)
scalar as an actual argument to a procedure with an intent(out) (but not
allocatable) dummy argument. The attached code illustrates the problem.
Compiling with gfortran 10.2.0 at optimization level -O1 or -O2 leads to a
segmentation fault at runtime. The segfault arises when the dummy is assigned
within set_i(). This problem does not arise at optimization level -O0, and the
program performs as expected (outputting '5' to the terminal).
The problem also seems to disappear when set_i() is a CONTAINed procedure in
the main program, rather than a module procedure.
cheers,
Rich
