[Debian-med-packaging] Bug#925745: libgtextutils: ftbfs with GCC-9

[Matthias Klose]

Package: src:libgtextutils
Version: 0.7-6
Severity: normal
Tags: sid bullseye
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-9

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-9/g++-9, but succeeds to build with gcc-8/g++-8. The
severity of this report will be raised before the bullseye release,
so nothing has to be done for the buster release.

The full build log can be found at:
http://people.debian.org/~doko/logs/gcc9-20190321/libgtextutils_0.7-6_unstable_gcc9.log
The last lines of the build log are at the end of this report.

To build with GCC 9, either set CC=gcc-9 CXX=g++-9 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

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-9/porting_to.html

GCC 9 also passes the linker option --as-needed by default; typical
build issues are passing libraries before object files to the linker,
or underlinking of convenience libraries built from the same source.

[...]
make[3]: Leaving directory '/<<PKGBUILDDIR>>/src'
Making all in doc
make[3]: Entering directory '/<<PKGBUILDDIR>>/doc'
make[3]: Nothing to be done for 'all'.
make[3]: Leaving directory '/<<PKGBUILDDIR>>/doc'
Making all in tests
make[3]: Entering directory '/<<PKGBUILDDIR>>/tests'
make[3]: Nothing to be done for 'all'.
make[3]: Leaving directory '/<<PKGBUILDDIR>>/tests'
make[3]: Entering directory '/<<PKGBUILDDIR>>'
make[3]: Leaving directory '/<<PKGBUILDDIR>>'
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
   dh_auto_test -a
	make -j4 check VERBOSE=1
make[1]: Entering directory '/<<PKGBUILDDIR>>'
Making check in m4
make[2]: Entering directory '/<<PKGBUILDDIR>>/m4'
make[2]: Nothing to be done for 'check'.
make[2]: Leaving directory '/<<PKGBUILDDIR>>/m4'
Making check in src
make[2]: Entering directory '/<<PKGBUILDDIR>>/src'
Making check in gtextutils
make[3]: Entering directory '/<<PKGBUILDDIR>>/src/gtextutils'
make[3]: Nothing to be done for 'check'.
make[3]: Leaving directory '/<<PKGBUILDDIR>>/src/gtextutils'
make[3]: Entering directory '/<<PKGBUILDDIR>>/src'
make[3]: Nothing to be done for 'check-am'.
make[3]: Leaving directory '/<<PKGBUILDDIR>>/src'
make[2]: Leaving directory '/<<PKGBUILDDIR>>/src'
Making check in doc
make[2]: Entering directory '/<<PKGBUILDDIR>>/doc'
make[2]: Nothing to be done for 'check'.
make[2]: Leaving directory '/<<PKGBUILDDIR>>/doc'
Making check in tests
make[2]: Entering directory '/<<PKGBUILDDIR>>/tests'
make  test_container_join test_natural_sort test_input_stream_wrapper test_text_reader test_text_reader_unget test_fd_outbuf test_fd_inbuf test_in_out_buf test_pipe_fitter test_string_tokenize 
make[3]: Entering directory '/<<PKGBUILDDIR>>/tests'
g++ -DHAVE_CONFIG_H -I. -I..  -I../src -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -Wextra -Wformat-nonliteral -Wformat-security -Wswitch-default -Wswitch-enum -Wunused-parameter -Wfloat-equal -Werror -DDEBUG -g -O1 -DDEBUG -g -O1 -c -o test_container_join.o test_container_join.cpp
printf "first line\nsecond line\nthird line\nfourth line\n" > test.txt
g++ -DHAVE_CONFIG_H -I. -I..  -I../src -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -Wextra -Wformat-nonliteral -Wformat-security -Wswitch-default -Wswitch-enum -Wunused-parameter -Wfloat-equal -Werror -DDEBUG -g -O1 -DDEBUG -g -O1 -c -o test_natural_sort.o test_natural_sort.cpp
g++ -DHAVE_CONFIG_H -I. -I..  -I../src -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -Wextra -Wformat-nonliteral -Wformat-security -Wswitch-default -Wswitch-enum -Wunused-parameter -Wfloat-equal -Werror -DDEBUG -g -O1 -DDEBUG -g -O1 -c -o test_input_stream_wrapper.o test_input_stream_wrapper.cpp
g++ -DHAVE_CONFIG_H -I. -I..  -I../src -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -Wextra -Wformat-nonliteral -Wformat-security -Wswitch-default -Wswitch-enum -Wunused-parameter -Wfloat-equal -Werror -DDEBUG -g -O1 -DDEBUG -g -O1 -c -o test_text_reader.o test_text_reader.cpp
test_text_reader.cpp: In function 'int main()':
test_text_reader.cpp:48:9: error: ambiguous overload for 'operator=' (operand types are 'std::string' {aka 'std::__cxx11::basic_string<char>'} and 'TextLineReader')
   48 |  line = reader ; //second line - with implicit conversion to std::string
      |         ^~~~~~
In file included from /usr/include/c++/9/string:55,
                 from /usr/include/c++/9/bits/locale_classes.h:40,
                 from /usr/include/c++/9/bits/ios_base.h:41,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from test_text_reader.cpp:19:
/usr/include/c++/9/bits/basic_string.h:665:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator=(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  665 |       operator=(const basic_string& __str)
      |       ^~~~~~~~
/usr/include/c++/9/bits/basic_string.h:732:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator=(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  732 |       operator=(basic_string&& __str)
      |       ^~~~~~~~
make[3]: *** [Makefile:781: test_text_reader.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory '/<<PKGBUILDDIR>>/tests'
make[2]: *** [Makefile:1129: check-am] Error 2
make[2]: Leaving directory '/<<PKGBUILDDIR>>/tests'
make[1]: *** [Makefile:479: check-recursive] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
dh_auto_test: make -j4 check VERBOSE=1 returned exit code 2
make: *** [debian/rules:8: build-arch] Error 2
dpkg-buildpackage: error: debian/rules build-arch subprocess returned exit status 2