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From: "baradi09 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/105170] New: Invalid finalization in intrinsic assignment
Date: Tue, 05 Apr 2022 19:58:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105170

            Bug ID: 105170
           Summary: Invalid finalization in intrinsic assignment
           Product: gcc
           Version: 11.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: baradi09 at gmail dot com
  Target Milestone: ---

Created attachment 52754
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D52754&action=3Dedit
Minimal working example demonstrating the bug

I have a derived type (TWrapper), which has a component with defined
assignment. The containing derived type itself has no defined assignment. U=
pon
an assignment between two TWrapper instances, a copy of the RHS seems to get
finalized.

The attached MWE demonstrates the problem.

Expected output (as delivered by current Intel and NAG compilers):

RefCounter_final, id:0
TRefCounter_init: id:42
-> Assignment wrapper2 =3D wrapper
TRefCounter_final, id:0
TRefCounter_final, id:0
TRefCounter_assign: this%id, other%id: 0 42

GFortran output:

TRefCounter_final, id:0
TRefCounter_init: id:42
-> Assignment wrapper2 =3D wrapper
TRefCounter_final, id:42
TRefCounter_assign: this%id, other%id: 0 42

One finalization seems to be missing. Additionally, the finalized instance
seems to be a copy of the RHS. (A copy, because after the finalization, the=
 RHS
still seems to have kept its id-value...)=