Package: src:qt6-charts
Version: 6.7.2-3
Severity: important
Tags: sid forky
User: debian-...@lists.debian.org
Usertags: ftbfs-gcc-15

[This bug is NOT targeted to the upcoming trixie release]

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-15/g++-15, but succeeds to build with gcc-14/g++-14. The
severity of this report will be raised before the forky release.

The full build log can be found at:
http://qa-logs.debian.net/2025/02/16/amd64exp/qt6-charts_6.7.2-3_unstable_gccexp.log.gz
The last lines of the build log are at the end of this report.

To build with GCC 15, either set CC=gcc-15 CXX=g++-15 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

GCC 15 now defaults to the C23/C++23 standards, exposing many FTBFS.
Other Common build failures are new warnings resulting in build failures
with -Werror turned on, or new/dropped symbols in Debian symbols files.
For other C/C++ related build failures see the porting guide at
http://gcc.gnu.org/gcc-15/porting_to.html

[...]
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: src/charts/CMakeFiles/Charts.dir/animations/scatteranimation.cpp.o 
(symbol from plugin): in function `ScatterAnimation::~ScatterAnimation()':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: src/charts/CMakeFiles/Charts.dir/scatterchart/qscatterseries.cpp.o 
(symbol from plugin): in function `QScatterSeries::type() const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/scatterchart/scatterchartitem.cpp.o (symbol 
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(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: src/charts/CMakeFiles/Charts.dir/animations/splineanimation.cpp.o 
(symbol from plugin): in function 
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(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: src/charts/CMakeFiles/Charts.dir/splinechart/qsplineseries.cpp.o 
(symbol from plugin): in function `QSplineSeries::type() const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: src/charts/CMakeFiles/Charts.dir/splinechart/splinechartitem.cpp.o 
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(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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(symbol from plugin): in function 
`BoxPlotAnimation::qt_static_metacall(QObject*, QMetaObject::Call, int, 
void**)':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/animations/boxwhiskersanimation.cpp.o (symbol 
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QMetaObject::Call, int, void**)':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/boxplotchart/boxplotchartitem.cpp.o (symbol 
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QStyleOptionGraphicsItem const*, QWidget*)':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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(symbol from plugin): in function `BoxWhiskers::boundingRect() const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/boxplotchart/qboxplotmodelmapper.cpp.o (symbol 
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QMetaObject::Call, int, void**)':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: src/charts/CMakeFiles/Charts.dir/boxplotchart/qboxplotseries.cpp.o 
(symbol from plugin): in function `QBoxPlotSeries::type() const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: src/charts/CMakeFiles/Charts.dir/boxplotchart/qboxset.cpp.o 
(symbol from plugin): in function `QBoxSet::staticMetaObject':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/boxplotchart/qhboxplotmodelmapper.cpp.o 
(symbol from plugin): in function `QHBoxPlotModelMapper::staticMetaObject':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/boxplotchart/qvboxplotmodelmapper.cpp.o 
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(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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(symbol from plugin): in function `QBoxPlotLegendMarker::series()':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/animations/candlestickanimation.cpp.o (symbol 
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QMetaObject::Call, int, void**)':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/animations/candlestickbodywicksanimation.cpp.o 
(symbol from plugin): in function 
`CandlestickBodyWicksAnimation::qt_static_metacall(QObject*, QMetaObject::Call, 
int, void**)':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/candlestickchart/candlestick.cpp.o (symbol 
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(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/candlestickchart/candlestickchartitem.cpp.o 
(symbol from plugin): in function `CandlestickChartItem::boundingRect() const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/candlestickchart/qcandlestickmodelmapper.cpp.o 
(symbol from plugin): in function `QCandlestickModelMapper::staticMetaObject':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/candlestickchart/qcandlestickseries.cpp.o 
(symbol from plugin): in function `QCandlestickSeries::type() const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/candlestickchart/qcandlestickset.cpp.o (symbol 
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(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/candlestickchart/qhcandlestickmodelmapper.cpp.o
 (symbol from plugin): in function `QHCandlestickModelMapper::orientation() 
const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
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/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/candlestickchart/qvcandlestickmodelmapper.cpp.o
 (symbol from plugin): in function `QVCandlestickModelMapper::orientation() 
const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/legend/qcandlesticklegendmarker.cpp.o (symbol 
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(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/axis/datetimeaxis/chartdatetimeaxisx.cpp.o 
(symbol from plugin): in function `ChartDateTimeAxisX::staticMetaObject':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/axis/datetimeaxis/chartdatetimeaxisy.cpp.o 
(symbol from plugin): in function `ChartDateTimeAxisY::staticMetaObject':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/axis/datetimeaxis/datetimeaxislabel.cpp.o 
(symbol from plugin): in function `DateTimeAxisLabel::staticMetaObject':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/axis/datetimeaxis/polarchartdatetimeaxisangular.cpp.o
 (symbol from plugin): in function 
`PolarChartDateTimeAxisAngular::staticMetaObject':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/axis/datetimeaxis/polarchartdatetimeaxisradial.cpp.o
 (symbol from plugin): in function 
`PolarChartDateTimeAxisRadial::staticMetaObject':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
/usr/bin/ld: 
src/charts/CMakeFiles/Charts.dir/axis/datetimeaxis/qdatetimeaxis.cpp.o (symbol 
from plugin): in function `QDateTimeAxis::type() const':
(.text+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
src/charts/CMakeFiles/Charts.dir/Charts_autogen/mocs_compilation.cpp.o (symbol 
from plugin):(.text+0x0): first defined here
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
dh_auto_build: error: cd obj-x86_64-linux-gnu && LC_ALL=C.UTF-8 ninja -j8 -v 
returned exit code 1
make: *** [debian/rules:12: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2

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