[3dprinter-general] Bug#1084769: slic3r-prusa: FTBFS: error: ‘random_device’ is not a member of ‘std’

[Santiago Vila]

Package: src:slic3r-prusa
Version: 2.8.1+dfsg2-1
Severity: serious
Tags: ftbfs

Dear maintainer:

During a rebuild of all packages in unstable, your package failed to build:

--------------------------------------------------------------------------------
[...]

/<<PKGBUILDDIR>>/tests/libslic3r/test_mutable_priority_queue.cpp:121:14: error: ‘random_device’ is not a member of ‘std’
   121 |         std::random_device rd;
       |              ^~~~~~~~~~~~~
/<<PKGBUILDDIR>>/tests/libslic3r/test_mutable_priority_queue.cpp:122:14: error: ‘mt19937’ is not a member of ‘std’
   122 |         std::mt19937 gen(rd());
       |              ^~~~~~~
/<<PKGBUILDDIR>>/tests/libslic3r/test_mutable_priority_queue.cpp:126:22: error: ‘gen’ was not declared in this scope
   126 |             i = dist(gen);
       |                      ^~~
/<<PKGBUILDDIR>>/tests/libslic3r/test_mutable_priority_queue.cpp: In function ‘void CATCH2_INTERNAL_TEST_14()’:
/<<PKGBUILDDIR>>/tests/libslic3r/test_mutable_priority_queue.cpp:319:14: error: ‘random_device’ is not a member of ‘std’
   319 |         std::random_device rd;
       |              ^~~~~~~~~~~~~
/<<PKGBUILDDIR>>/tests/libslic3r/test_mutable_priority_queue.cpp:320:14: error: ‘mt19937’ is not a member of ‘std’
   320 |         std::mt19937 gen(rd());
       |              ^~~~~~~
/<<PKGBUILDDIR>>/tests/libslic3r/test_mutable_priority_queue.cpp:327:23: error: ‘gen’ was not declared in this scope
   327 |             int num = gen();
       |                       ^~~
make[3]: *** [tests/libslic3r/CMakeFiles/libslic3r_tests.dir/build.make:373: tests/libslic3r/CMakeFiles/libslic3r_tests.dir/test_mutable_priority_queue.cpp.o] Error 1
make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:1473: tests/libslic3r/CMakeFiles/libslic3r_tests.dir/all] Error 2
make[2]: *** Waiting for unfinished jobs....

--------------------------------------------------------------------------------

The error happens in the middle of the build, so I have quoted the relevant part.
If required, the full build log is available here:

https://people.debian.org/~sanvila/build-logs/202410/

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 could not 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 affects, so that this is still visible in the BTS web
page for this package.

Thanks.