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Bug#966895: ms-gsl: FTBFS: multi_span:1467:96: error: array subscript 6 is outside array bounds of ‘int [5]’ [-Werror=array-bounds]

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Source: ms-gsl
Version: 3.1.0-1
Severity: serious
Justification: FTBFS on amd64
Tags: bullseye sid ftbfs
Usertags: ftbfs-20200802 ftbfs-bullseye

Hi,

During a rebuild of all packages in sid, your package failed to build
on amd64.

Relevant part (hopefully):
> /usr/bin/c++  -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2  -Wl,-z,relro -rdynamic CMakeFiles/span_tests.dir/span_tests.cpp.o  -o span_tests  -lgtest_main -lpthread -lgtest -lpthread -lgtest 
> In file included from /<<PKGBUILDDIR>>/tests/multi_span_tests.cpp:21:
> /<<PKGBUILDDIR>>/include/gsl/multi_span: In member function ‘virtual void multi_span_test_subspan_Test::TestBody()’:
> /<<PKGBUILDDIR>>/include/gsl/multi_span:1467:96: error: array subscript 6 is outside array bounds of ‘int [5]’ [-Werror=array-bounds]
>  1467 |         return {this->data() + offset, count == dynamic_range ? this->length() - offset : count};
>       |                                                                                                ^
> /<<PKGBUILDDIR>>/tests/multi_span_tests.cpp:986:9: note: while referencing ‘arr’
>   986 |     int arr[5] = {1, 2, 3, 4, 5};
>       |         ^~~
> make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
> [ 78%] Built target span_tests
> make -f tests/CMakeFiles/strided_span_tests.dir/build.make tests/CMakeFiles/strided_span_tests.dir/depend
> make[3]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
> cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /<<PKGBUILDDIR>> /<<PKGBUILDDIR>>/tests /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/tests /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/tests/CMakeFiles/strided_span_tests.dir/DependInfo.cmake --color=
> Scanning dependencies of target strided_span_tests
> make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
> make -f tests/CMakeFiles/strided_span_tests.dir/build.make tests/CMakeFiles/strided_span_tests.dir/build
> make[3]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
> [ 81%] Building CXX object tests/CMakeFiles/strided_span_tests.dir/strided_span_tests.cpp.o
> cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/tests && /usr/bin/c++   -I/<<PKGBUILDDIR>>/include -isystem /<<PKGBUILDDIR>>/tests/googletest/googletest/include  -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2   -fno-strict-aliasing -Wall -Wcast-align -Wconversion -Wctor-dtor-privacy -Werror -Wextra -Wpedantic -Wshadow -Wsign-conversion -Wno-deprecated-declarations -Wdouble-promotion -Wlogical-op -Wduplicated-cond -Wmisleading-indentation -Wnull-dereference -Wno-unused-variable -Wduplicated-branches -o CMakeFiles/strided_span_tests.dir/strided_span_tests.cpp.o -c /<<PKGBUILDDIR>>/tests/strided_span_tests.cpp
> cc1plus: all warnings being treated as errors
> make[3]: *** [tests/CMakeFiles/multi_span_tests.dir/build.make:66: tests/CMakeFiles/multi_span_tests.dir/multi_span_tests.cpp.o] Error 1

The full build log is available from:
   http://qa-logs.debian.net/2020/08/02/ms-gsl_3.1.0-1_unstable.log

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.

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Bug#966895: ms-gsl: FTBFS: multi_span:1467:96: error: array subscript 6 is outside array bounds of ‘int [5]’ [-Werror=array-bounds] Lucas Nussbaum <lucas@debian.org> - 2020-08-03 10:30 +0200

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