[gcc r12-9243] fortran: Plug leak of associated_dummy memory. [PR108923]

[Mikael Morin <mikael@gcc.gnu.org>]

https://gcc.gnu.org/g:cd65c727fd6d5a252964dbeb3a735daa0a521a89

commit r12-9243-gcd65c727fd6d5a252964dbeb3a735daa0a521a89
Author: Mikael Morin <mikael@gcc.gnu.org>
Date:   Fri Feb 24 22:11:17 2023 +0100

    fortran: Plug leak of associated_dummy memory. [PR108923]
    
    This fixes a memory leak by accompanying the release of
    gfc_actual_arglist elements' memory with a release of the
    associated_dummy field memory (if allocated).
    Actual argument copy is adjusted as well so that each copy can free
    its field independently.
    
            PR fortran/108923
    
    gcc/fortran/ChangeLog:
    
            * expr.cc (gfc_free_actual_arglist): Free associated_dummy
            memory.
            (gfc_copy_actual_arglist): Make a copy of the associated_dummy
            field if it is set in the original element.
    
    (cherry picked from commit 24c9edfa73632276d7698c103f35833f29804d98)

Diff:
---
 gcc/fortran/expr.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gcc/fortran/expr.cc b/gcc/fortran/expr.cc
index 15d41d023d3..1369f25011f 100644
--- a/gcc/fortran/expr.cc
+++ b/gcc/fortran/expr.cc
@@ -545,6 +545,7 @@ gfc_free_actual_arglist (gfc_actual_arglist *a1)
       a2 = a1->next;
       if (a1->expr)
 	gfc_free_expr (a1->expr);
+      free (a1->associated_dummy);
       free (a1);
       a1 = a2;
     }
@@ -565,6 +566,12 @@ gfc_copy_actual_arglist (gfc_actual_arglist *p)
       new_arg = gfc_get_actual_arglist ();
       *new_arg = *p;
 
+      if (p->associated_dummy != NULL)
+	{
+	  new_arg->associated_dummy = gfc_get_dummy_arg ();
+	  *new_arg->associated_dummy = *p->associated_dummy;
+	}
+
       new_arg->expr = gfc_copy_expr (p->expr);
       new_arg->next = NULL;