Your message dated Sat, 18 Jul 2026 08:16:02 +0000
with message-id <[email protected]>
and subject line Bug#1142180: fixed in opencv 4.10.0+dfsg-8
has caused the Debian Bug report #1142180,
regarding FTBFS: vtkVizInteractorStyle.cpp:99:5: error: ‘cout’ was not declared
in this scope
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1142180: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1142180
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Source: opencv
Version: 4.10.0+dfsg-7
Severity: serious
Tags: ftbfs
opencv currently FTBFS,
see
https://buildd.debian.org/status/fetch.php?pkg=opencv&arch=amd64&ver=4.10.0%2Bdfsg-7%2Bb3&stamp=1784188231&raw=0
[552/1223] /usr/bin/x86_64-linux-gnu-g++ -DCVAPI_EXPORTS -DFMT_SHARED
-DGLAD_API_CALL_EXPORT -DSCN_DISABLE_FAST_FLOAT=0 -DSCN_DISABLE_REGEX=0
-DSCN_REGEX_BACKEND=0 -D_USE_MATH_DEFINES -D__OPENCV_BUILD=1
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-Dkiss_fft_scalar=double
-DvtkRenderingCore_AUTOINIT_INCLUDE=\"/build/reproducible-path/opencv-4.10.0+dfsg/obj-x86_64-linux-gnu/CMakeFiles/vtkModuleAutoInit_be7301261a49b13d6a9b1d9e110eacd8.h\"
-I/build/reproducible-path/opencv-4.10.0+dfsg/obj-x86_64-linux-gnu
-I/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/include
-I/build/reproducible-path/opencv-4.10.0+dfsg/obj-x86_64-linux-gnu/modules/viz
-I/build/reproducible-path/opencv-4.10.0+dfsg/modules/core/include -isystem
/usr/include/gdal -isystem /usr/include/eigen3 -isystem /usr/include/vtk-9.6
-isystem /usr/include/vtk-9.6/vtkfmt -isystem
/usr/include/vtk-9.6/vtkscn/include -isystem /usr/include/vtk-9.6/vtkscn
-isystem /usr/include/vtk-9.6/token -isystem /usr/include/vtk-9.6/vtkkissfft
-isystem /usr/include/freetype2 -isystem /usr/include/jsoncpp -isystem
/usr/include/vtk-9.6/vtkglad -g -O2
-ffile-prefix-map=/build/reproducible-path/opencv-4.10.0+dfsg=.
-fstack-protector-strong -fstack-clash-protection -Wformat
-Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2
-fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress
-Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef
-Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized
-Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3
-Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread
-fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2
-fvisibility=hidden -fvisibility-inlines-hidden -Wno-suggest-override -g -O2
-ffile-prefix-map=/build/reproducible-path/opencv-4.10.0+dfsg=.
-fstack-protector-strong -fstack-clash-protection -Wformat
-Werror=format-security -fcf-protection -DNDEBUG -std=c++17 -fPIC -MD -MT
modules/viz/CMakeFiles/opencv_viz.dir/src/vtk/vtkVizInteractorStyle.cpp.o -MF
modules/viz/CMakeFiles/opencv_viz.dir/src/vtk/vtkVizInteractorStyle.cpp.o.d -o
modules/viz/CMakeFiles/opencv_viz.dir/src/vtk/vtkVizInteractorStyle.cpp.o -c
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp
FAILED: [code=1]
modules/viz/CMakeFiles/opencv_viz.dir/src/vtk/vtkVizInteractorStyle.cpp.o
/usr/bin/x86_64-linux-gnu-g++ -DCVAPI_EXPORTS -DFMT_SHARED
-DGLAD_API_CALL_EXPORT -DSCN_DISABLE_FAST_FLOAT=0 -DSCN_DISABLE_REGEX=0
-DSCN_REGEX_BACKEND=0 -D_USE_MATH_DEFINES -D__OPENCV_BUILD=1
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-Dkiss_fft_scalar=double
-DvtkRenderingCore_AUTOINIT_INCLUDE=\"/build/reproducible-path/opencv-4.10.0+dfsg/obj-x86_64-linux-gnu/CMakeFiles/vtkModuleAutoInit_be7301261a49b13d6a9b1d9e110eacd8.h\"
-I/build/reproducible-path/opencv-4.10.0+dfsg/obj-x86_64-linux-gnu
-I/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/include
-I/build/reproducible-path/opencv-4.10.0+dfsg/obj-x86_64-linux-gnu/modules/viz
-I/build/reproducible-path/opencv-4.10.0+dfsg/modules/core/include -isystem
/usr/include/gdal -isystem /usr/include/eigen3 -isystem /usr/include/vtk-9.6
-isystem /usr/include/vtk-9.6/vtkfmt -isystem
/usr/include/vtk-9.6/vtkscn/include -isystem /usr/include/vtk-9.6/vtkscn
-isystem /usr/include/vtk-9.6/token -isystem /usr/include/vtk-9.6/vtkkissfft
-isystem /usr/include/freetype2 -isystem /usr/include/jsoncpp -isystem
/usr/include/vtk-9.6/vtkglad -g -O2
-ffile-prefix-map=/build/reproducible-path/opencv-4.10.0+dfsg=.
-fstack-protector-strong -fstack-clash-protection -Wformat
-Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2
-fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress
-Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef
-Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized
-Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3
-Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread
-fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2
-fvisibility=hidden -fvisibility-inlines-hidden -Wno-suggest-override -g -O2
-ffile-prefix-map=/build/reproducible-path/opencv-4.10.0+dfsg=.
-fstack-protector-strong -fstack-clash-protection -Wformat
-Werror=format-security -fcf-protection -DNDEBUG -std=c++17 -fPIC -MD -MT
modules/viz/CMakeFiles/opencv_viz.dir/src/vtk/vtkVizInteractorStyle.cpp.o -MF
modules/viz/CMakeFiles/opencv_viz.dir/src/vtk/vtkVizInteractorStyle.cpp.o.d -o
modules/viz/CMakeFiles/opencv_viz.dir/src/vtk/vtkVizInteractorStyle.cpp.o -c
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:
In member function ‘void cv::viz::vtkVizInteractorStyle::saveScreenshot(const
cv::String&)’:
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:99:5:
error: ‘cout’ was not declared in this scope
99 | cout << "Screenshot successfully captured (" << file.c_str() << ")"
<< endl;
| ^~~~
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:
In member function ‘void cv::viz::vtkVizInteractorStyle::exportScene(const
cv::String&)’:
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:118:23:
warning: ‘void vtkExporter::SetInput(vtkRenderWindow*)’ is deprecated: Please
use SetRenderWindow instead [-Wdeprecated-declarations]
118 | exporter->SetInput(Interactor->GetRenderWindow());
| ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/vtk-9.6/vtkOBJExporter.h:19,
from
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/../precomp.hpp:126,
from
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:46:
/usr/include/vtk-9.6/vtkExporter.h:86:8: note: declared here
86 | void SetInput(vtkRenderWindow* renWin) {
this->SetRenderWindow(renWin); }
| ^~~~~~~~
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:121:5:
error: ‘cout’ was not declared in this scope
121 | cout << "Scene successfully exported (" << file.c_str() << ")" <<
endl;
| ^~~~
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:
In member function ‘void cv::viz::vtkVizInteractorStyle::printCameraParams()’:
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:176:10:
error: ‘cout’ is not a member of ‘std’
176 | std::cout << data.c_str() << std::endl;
| ^~~~
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:47:1:
note: ‘std::cout’ is defined in header ‘<iostream>’; this is probably fixable
by adding ‘#include <iostream>’
46 | #include "../precomp.hpp"
+++ |+#include <iostream>
47 |
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:
In member function ‘void cv::viz::vtkVizInteractorStyle::printHelp()’:
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:270:10:
error: ‘cout’ is not a member of ‘std’
270 | std::cout << "| Help:\n"
| ^~~~
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:270:10:
note: ‘std::cout’ is defined in header ‘<iostream>’; this is probably fixable
by adding ‘#include <iostream>’
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:
In member function ‘virtual void cv::viz::vtkVizInteractorStyle::OnKeyDown()’:
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:398:14:
error: ‘cout’ is not a member of ‘std’
398 | std::cout << (FlyMode ? "Fly mode: on" : "Fly mode: off") <<
std::endl;
| ^~~~
/build/reproducible-path/opencv-4.10.0+dfsg/contrib/modules/viz/src/vtk/vtkVizInteractorStyle.cpp:398:14:
note: ‘std::cout’ is defined in header ‘<iostream>’; this is probably fixable
by adding ‘#include <iostream>’
The build error appears to have been triggered by the transition to vtk 9.6,
but the error itself is in opencv's modules files,
trying to access std::cout without declaring #include <iostream>
There is a new upstream release, does it fix the issue?
--- End Message ---
--- Begin Message ---
Source: opencv
Source-Version: 4.10.0+dfsg-8
Done: Santiago Vila <[email protected]>
We believe that the bug you reported is fixed in the latest version of
opencv, 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 [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Santiago Vila <[email protected]> (supplier of updated opencv 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 [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Sat, 18 Jul 2026 09:35:00 +0200
Source: opencv
Architecture: source
Version: 4.10.0+dfsg-8
Distribution: unstable
Urgency: medium
Maintainer: Debian Science Team
<[email protected]>
Changed-By: Santiago Vila <[email protected]>
Closes: 1139140 1142180
Changes:
opencv (4.10.0+dfsg-8) unstable; urgency=medium
.
* Team upload.
.
[ Mo Zhou ]
* d/control: get rid of deprecated kfreebsd and powerpcspe architectures.
* lintian: remove unused lintian overrides.
.
[ Adrian Bunk ]
* Update the Uploaders list. Closes: #1139140.
* Fix FTBFS with VTK 9.6. Closes: #1142180.
.
[ Santiago Vila ]
* Disable Salsa CI jobs which are known to fail.
* Drop "Priority: optional" (default).
* Update standards-version.
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