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 for submit@bugs.debian.org; Wed, 17 Jun 2026 16:14:46 +0000
From: Santiago Vila &lt;sanvila@debian.org&gt;
To: Debian BTS &lt;submit@bugs.debian.org&gt;
Subject: alicevision: FTBFS: /usr/include/nanoflann.hpp:1262:29: error: no
 type named 'IndexType' in 'class
 aliceVision::fuseCut::SmallerPixSizeInRadius&lt;double, long unsigned int&gt;'
X-Debbugs-Cc: sanvila@debian.org
Message-Id: &lt;E1wZsuc-000uOc-0Q@paradis.debian.org&gt;
Date: Wed, 17 Jun 2026 16:14:46 +0000
Delivered-To: submit@bugs.debian.org

Package: src:alicevision
Version: 3.3.1+repack-4
Severity: serious
Tags: ftbfs forky sid

Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202606/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:alicevision, so that this is still
visible in the BTS web page for this package.

Thanks.

--------------------------------------------------------------------------------
[...]
/usr/include/nanoflann.hpp: In instantiation of ‘bool nanofl [too-long-redacted] or_t = std::array&lt;double, 3&gt;]’:
/usr/include/nanoflann.hpp:2003:26:   required from ‘bool nanoflann::KDTreeSingleIndexAdaptor&lt;Distance, DatasetAdaptor, DIM, index_t&gt;::findNeighbors(RESULTSET&amp;, const ElementType*, const nanoflann::SearchParameters&amp;) const [with RESULTSET = aliceVision::fuseCut::SmallerPixSizeInRadius&lt;double, long unsigned int&gt;; Distance = nanoflann::L2_Simple_Adaptor&lt;double, aliceVision::fuseCut::PointVectorAdaptator&gt;; DatasetAdaptor = aliceVision::fuseCut::PointVectorAdaptator; int DIM = 3; index_t = unsigned int; ElementType = double]’
 2003 |         this-&gt;searchLevel(result, vec, Base::root_node_, dist, dists, epsError);
      |         ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/&lt;&lt;PKGBUILDDIR&gt;&gt;/src/aliceVision/fuseCut/PointCloud.cpp:60:29:   required from here
   60 |         kdTree.findNeighbors(resultSet, verticesCoordsPrepare[vIndex].m, searchParams);
      |         ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/nanoflann.hpp:1262:29: error: no type named ‘IndexType’ in ‘class aliceVision::fuseCut::SmallerPixSizeInRadius&lt;double, long unsigned int&gt;’
 1262 |                             static_cast&lt;typename RESULTSET::IndexType&gt;(accessor)))
      |                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[3]: *** [src/aliceVision/fuseCut/CMakeFiles/aliceVision_fuseCut.dir/build.make:152: src/aliceVision/fuseCut/CMakeFiles/aliceVision_fuseCut.dir/PointCloud.cpp.o] Error 1
make[3]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:3418: src/aliceVision/fuseCut/CMakeFiles/aliceVision_fuseCut.dir/all] Error 2
make[2]: *** Waiting for unfinished jobs....
[ 70%] Building CXX object src/aliceVision/sfm/CMakeFiles/aliceVision_sfm.dir/pipeline/bootstrapping/EstimateAngle.cpp.o
cd /&lt;&lt;PKGBUILDDIR&gt;&gt;/obj-x86_64-linux-gnu/src/aliceVision/sfm [too-long-redacted] bootstrapping/EstimateAngle.cpp
[ 71%] Building CXX object src/aliceVision/sfm/CMakeFiles/aliceVision_sfm.dir/pipeline/bootstrapping/PairsScoring.cpp.o

[...]

[ 76%] Linking CXX shared library ../../../Linux-x86_64/libaliceVision_sfm.so
cd /&lt;&lt;PKGBUILDDIR&gt;&gt;/obj-x86_64-linux-gnu/src/aliceVision/sfm &amp;&amp; /usr/bin/cmake -E cmake_link_script CMakeFiles/aliceVision_sfm.dir/link.txt --verbose=1
/usr/bin/x86_64-linux-gnu-g++ -fPIC -g -O2 -ffile-prefix-map [too-long-redacted] nu/libboost_container.so.1.90.0
cd /&lt;&lt;PKGBUILDDIR&gt;&gt;/obj-x86_64-linux-gnu/src/aliceVision/sfm &amp;&amp; /usr/bin/cmake -E cmake_symlink_library ../../../Linux-x86_64/libaliceVision_sfm.so.3.3 ../../../Linux-x86_64/libaliceVision_sfm.so.3 ../../../Linux-x86_64/libaliceVision_sfm.so
make[3]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;/obj-x86_64-linux-gnu'
[ 76%] Built target aliceVision_sfm
make[2]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;/obj-x86_64-linux-gnu'
make[1]: *** [Makefile:139: all] Error 2
make[1]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;/obj-x86_64-linux-gnu'
dh_auto_build: error: cd obj-x86_64-linux-gnu &amp;&amp; make -j2 INSTALL=&quot;install --strip-program=true&quot; VERBOSE=1 returned exit code 2
make: *** [debian/rules:10: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
--------------------------------------------------------------------------------
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