This package currently fails to build (at least on the amd64
architecture) with link time optimizations enabled.  For a background
for LTO please see

https://wiki.debian.org/ToolChain/LTO

The goal is to enable this optimization by default in an upcoming
Debian release in dpkg-buildflags for 64bit architectures.  The goal
is to get this package to build with link time optimizations, or to
explicitly disable link time optimizations for this package build.

To reproduce the build failure, enable the lto optimization in
testing/unstable by adding "optimize=+lto" to DEB_BUILD_MAINT_OPTIONS
in the debian/rules file, or if this macro is unset, just set it:

export DEB_BUILD_MAINT_OPTIONS = optimize=+lto

Please try to fix the build with lto enabled, fixing the packaging or
forwarding the issue upstream. If the issue cannot be fixed,
explicitly disallow building the package with lto by adding to your
rules file:

export DEB_BUILD_MAINT_OPTIONS = optimize=-lto

or adding that string to your existing setting of DEB_BUILD_MAINT_OPTIONS.

The full build log can be found at:
http://qa-logs.debian.net/2022/06/09/dpkglto/kseexpr_4.0.4.0-2_unstable_dpkglto.log
The last lines of the build log are at the end of this report.

[...]
- _ZTVN7KSeExpr11ControlSpecE@Base 4.0.4.0
+#MISSING: 4.0.4.0-2# _ZTVN15BasicExpression10DummyFuncXE@Base 4.0.4.0
+#MISSING: 4.0.4.0-2# _ZTVN15BasicExpression9ScalarRefE@Base 4.0.4.0
+#MISSING: 4.0.4.0-2# _ZTVN15BasicExpression9VectorRefE@Base 4.0.4.0
+#MISSING: 4.0.4.0-2# _ZTVN7KSeExpr11ControlSpecE@Base 4.0.4.0
  _ZTVN7KSeExpr11ExprStrSpecE@Base 4.0.4.0
- _ZTVN7KSeExpr12ExprFuncNode4DataE@Base 4.0.4.0
+#MISSING: 4.0.4.0-2# _ZTVN7KSeExpr12ExprFuncNode4DataE@Base 4.0.4.0
  _ZTVN7KSeExpr12SpecExaminerE@Base 4.0.4.0
- (subst)_ZTVN7KSeExpr19ExprCurveAssignSpecINS_3VecIdL{size_t}3ELb0EEEEE@Base 4.0.4.0
- _ZTVN7KSeExpr19ExprCurveAssignSpecIdEE@Base 4.0.4.0
+#MISSING: 4.0.4.0-2# (subst)_ZTVN7KSeExpr19ExprCurveAssignSpecINS_3VecIdL{size_t}3ELb0EEEEE@Base 4.0.4.0
+#MISSING: 4.0.4.0-2# _ZTVN7KSeExpr19ExprCurveAssignSpecIdEE@Base 4.0.4.0
  _ZTVN7KSeExpr20ExprScalarAssignSpecE@Base 4.0.4.0
  _ZTVN7KSeExpr20ExprVectorAssignSpecE@Base 4.0.4.0
- _ZTVN7KSeExpr6LoaderE@Base 4.0.4.0
+#MISSING: 4.0.4.0-2# _ZTVN7KSeExpr6LoaderE@Base 4.0.4.0
  (optional=templinst)_ZZN18QMetaTypeIdQObjectIP14ExprColorFrameLi8EE14qt_metatype_idEvE11metatype_id@Base 4.0.4.0
- (c++)"non-virtual thunk to CCurveControl::~CCurveControl()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ColorSwatchControl::~ColorSwatchControl()@Base" 4.0.4.0
- (c++)"non-virtual thunk to CurveControl::~CurveControl()@Base" 4.0.4.0
- (c++)"non-virtual thunk to CurveGraphicsView::~CurveGraphicsView()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprAddDialog::~ExprAddDialog()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to CCurveControl::~CCurveControl()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ColorSwatchControl::~ColorSwatchControl()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to CurveControl::~CurveControl()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to CurveGraphicsView::~CurveGraphicsView()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprAddDialog::~ExprAddDialog()@Base" 4.0.4.0
  (c++)"non-virtual thunk to ExprBrowser::~ExprBrowser()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprCBoxWidget::~ExprCBoxWidget()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprCSwatchFrame::~ExprCSwatchFrame()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprChannelSlider::~ExprChannelSlider()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprColorCurve::~ExprColorCurve()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprColorFrame::~ExprColorFrame()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprColorSwatchWidget::~ExprColorSwatchWidget()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprColorWidget::~ExprColorWidget()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprControl::~ExprControl()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprCBoxWidget::~ExprCBoxWidget()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprCSwatchFrame::~ExprCSwatchFrame()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprChannelSlider::~ExprChannelSlider()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprColorCurve::~ExprColorCurve()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprColorFrame::~ExprColorFrame()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprColorSwatchWidget::~ExprColorSwatchWidget()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprColorWidget::~ExprColorWidget()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprControl::~ExprControl()@Base" 4.0.4.0
  (c++)"non-virtual thunk to ExprControlCollection::~ExprControlCollection()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprCurve::~ExprCurve()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprCurve::~ExprCurve()@Base" 4.0.4.0
  (c++)"non-virtual thunk to ExprEditor::~ExprEditor()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprFileDialog::~ExprFileDialog()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprLineEdit::~ExprLineEdit()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprPopupDoc::~ExprPopupDoc()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprPreviewWidget::~ExprPreviewWidget()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprSlider::~ExprSlider()@Base" 4.0.4.0
- (c++)"non-virtual thunk to ExprTextEdit::~ExprTextEdit()@Base" 4.0.4.0
- (c++)"non-virtual thunk to NumberControl::~NumberControl()@Base" 4.0.4.0
- (c++)"non-virtual thunk to StringControl::~StringControl()@Base" 4.0.4.0
- (c++)"non-virtual thunk to VectorControl::~VectorControl()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprFileDialog::~ExprFileDialog()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprLineEdit::~ExprLineEdit()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprPopupDoc::~ExprPopupDoc()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprPreviewWidget::~ExprPreviewWidget()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprSlider::~ExprSlider()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to ExprTextEdit::~ExprTextEdit()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to NumberControl::~NumberControl()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to StringControl::~StringControl()@Base" 4.0.4.0
+#MISSING: 4.0.4.0-2# (c++)"non-virtual thunk to VectorControl::~VectorControl()@Base" 4.0.4.0
dh_makeshlibs: error: failing due to earlier errors
make: *** [debian/rules:4: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2

We believe that the bug you reported is fixed in the latest version of
kseexpr, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1015462@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Pino Toscano <pino@debian.org> (supplier of updated kseexpr package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 22 Dec 2025 10:11:05 +0100
Source: kseexpr
Architecture: source
Version: 4.0.4.0-8
Distribution: unstable
Urgency: medium
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Changed-By: Pino Toscano <pino@debian.org>
Closes: 1015462
Changes:
 kseexpr (4.0.4.0-8) unstable; urgency=medium
 .
   * Drop Rules-Requires-Root: no, no more needed since Debian trixie.
   * Bump Standards-Version to 4.7.2, no changes required.
   * CI: update/simplify configuration.
   * Give up maintaining symbols files for these libraries: the upstream version
     has not changed, and the lack of symbols visibility/hiding creates constant
     changes depending on GCC and Qt (at least). (Closes: #1015462)
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