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

[Olivier Sallou]

On 8/20/19 1:24 PM, Andreas Tille wrote:
> Control: tags -1 help
>
> Hi,
>
> any hint how to deal with


this is a test file. In test, there is explicit conversion to string:

line = reader.line_string() ; //first line - with explicit method to get
the string

which works fine as expected

In gcc 9 bug, it is implicit conversion that fails. Seems due some c++
11 updates on operators, but I am not an expert on this kind of stuff.

As this is only a test, and there is a way to get the result as a string
(as first test above test with explicit method), I wonder if we could
not simply patch to remove those lines:


        line = reader ; //second line - with implicit conversion to
std::string
        ASSERT( line == "second line" ) ;

Further test may also complain (using implicit too):

        istream &is2 ( reader ) ; // fourth line - with implicit
conversion to std::istream


However, as it is a library, implicit conversion may fail on other tools
linking with this lib.... Best of course would be to get a fix for this
assignement operator

Olivier

>
>
> ...
> 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
>
>
> Kind regards
>
>       Andreas.
>
>
-- 
Olivier Sallou
Univ Rennes, Inria, CNRS, IRISA
Irisa, Campus de Beaulieu
F-35042 RENNES - FRANCE
Tel: 02.99.84.71.95

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