[Pkg-xmpp-devel] Bug#1088140: swift-im: FTBFS: Swiften/Parser/LibXMLParser.cpp:116:44: error: invalid conversion [...]

[Santiago Vila]

Package: src:swift-im
Version: 5.0~alpha2.145.g12d031cf8+dfsg-4
Severity: serious
Tags: ftbfs

Dear maintainer:

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

--------------------------------------------------------------------------------
[...]
  debian/rules binary
dh binary
    dh_update_autotools_config
    dh_autoreconf
    dh_auto_configure
    debian/rules override_dh_auto_build
make[1]: Entering directory '/<<PKGBUILDDIR>>'
mkdir -p /<<PKGBUILDDIR>>/debian/scons_home
echo  > VERSION.swift
scons --jobs=2 V=1 qt5=1 optimize=1 debug=1 allow_warnings=1 swiften_dll=1 help2man=1 docbook_xsl=/usr/share/xml/docbook/stylesheet/docbook-xsl docbook_xml=/usr/share/xml/docbook/schema/dtd/4.5 linkflags="-Wl,-z,relro -Wl,-z,now" ccflags="-Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -std=c++17" Swiften
scons: Reading SConscript files ...
Checking whether the C++ compiler works... yes
Checking whether the C compiler works... yes
Checking whether the C++ compiler supports C++11... yes

[... snipped ...]

g++ -o Swiften/Parser/XMLParser.os -c -std=c++11 -Wextra -Wall -Wnon-virtual-dtor -Wundef -Wold-style-cast -Wno-long-long -Woverloaded-virtual -Wfloat-equal -Wredundant-decls -Wno-unknown-pragmas -isystem/usr/include/libxml2 -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -std=c++17 -isystem /<<PKGBUILDDIR>>/Backport/ -O2 -g -fPIC -fPIC -DSWIFT_EXPERIMENTAL_FT -DSWIFTEN_BUILDING -DHAVE_LIBXML -I. -I/usr/include/miniupnpc Swiften/Parser/XMLParser.cpp
cc1plus: warning: '-Werror=' argument '-Werror=implicit-function-declaration' is not valid for C++
g++ -o Swiften/Parser/XMLParserClient.os -c -std=c++11 -Wextra -Wall -Wnon-virtual-dtor -Wundef -Wold-style-cast -Wno-long-long -Woverloaded-virtual -Wfloat-equal -Wredundant-decls -Wno-unknown-pragmas -isystem/usr/include/libxml2 -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -std=c++17 -isystem /<<PKGBUILDDIR>>/Backport/ -O2 -g -fPIC -fPIC -DSWIFT_EXPERIMENTAL_FT -DSWIFTEN_BUILDING -DHAVE_LIBXML -I. -I/usr/include/miniupnpc Swiften/Parser/XMLParserClient.cpp
cc1plus: warning: '-Werror=' argument '-Werror=implicit-function-declaration' is not valid for C++
g++ -o Swiften/Parser/XMLParserFactory.os -c -std=c++11 -Wextra -Wall -Wnon-virtual-dtor -Wundef -Wold-style-cast -Wno-long-long -Woverloaded-virtual -Wfloat-equal -Wredundant-decls -Wno-unknown-pragmas -isystem/usr/include/libxml2 -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -std=c++17 -isystem /<<PKGBUILDDIR>>/Backport/ -O2 -g -fPIC -fPIC -DSWIFT_EXPERIMENTAL_FT -DSWIFTEN_BUILDING -DHAVE_LIBXML -I. -I/usr/include/miniupnpc Swiften/Parser/XMLParserFactory.cpp
cc1plus: warning: '-Werror=' argument '-Werror=implicit-function-declaration' is not valid for C++
g++ -o Swiften/Parser/XMPPParser.os -c -std=c++11 -Wextra -Wall -Wnon-virtual-dtor -Wundef -Wold-style-cast -Wno-long-long -Woverloaded-virtual -Wfloat-equal -Wredundant-decls -Wno-unknown-pragmas -isystem/usr/include/libxml2 -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -std=c++17 -isystem /<<PKGBUILDDIR>>/Backport/ -O2 -g -fPIC -fPIC -DSWIFT_EXPERIMENTAL_FT -DSWIFTEN_BUILDING -DHAVE_LIBXML -I. -I/usr/include/miniupnpc Swiften/Parser/XMPPParser.cpp
cc1plus: warning: '-Werror=' argument '-Werror=implicit-function-declaration' is not valid for C++
g++ -o Swiften/Parser/XMPPParserClient.os -c -std=c++11 -Wextra -Wall -Wnon-virtual-dtor -Wundef -Wold-style-cast -Wno-long-long -Woverloaded-virtual -Wfloat-equal -Wredundant-decls -Wno-unknown-pragmas -isystem/usr/include/libxml2 -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -std=c++17 -isystem /<<PKGBUILDDIR>>/Backport/ -O2 -g -fPIC -fPIC -DSWIFT_EXPERIMENTAL_FT -DSWIFTEN_BUILDING -DHAVE_LIBXML -I. -I/usr/include/miniupnpc Swiften/Parser/XMPPParserClient.cpp
cc1plus: warning: '-Werror=' argument '-Werror=implicit-function-declaration' is not valid for C++
g++ -o Swiften/Parser/LibXMLParser.os -c -std=c++11 -Wextra -Wall -Wnon-virtual-dtor -Wundef -Wold-style-cast -Wno-long-long -Woverloaded-virtual -Wfloat-equal -Wredundant-decls -Wno-unknown-pragmas -isystem/usr/include/libxml2 -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -std=c++17 -isystem /<<PKGBUILDDIR>>/Backport/ -O2 -g -fPIC -fPIC -DSWIFT_EXPERIMENTAL_FT -DSWIFTEN_BUILDING -DHAVE_LIBXML -I. -I/usr/include/miniupnpc Swiften/Parser/LibXMLParser.cpp
cc1plus: warning: '-Werror=' argument '-Werror=implicit-function-declaration' is not valid for C++
Swiften/Parser/LibXMLParser.cpp: In function 'void Swift::handleStructuredError(void*, const xmlError*)':
Swiften/Parser/LibXMLParser.cpp:106:41: warning: unused parameter 'userData' [-Wunused-parameter]
   106 | static void handleStructuredError(void *userData, const xmlError *error) {
       |                                   ~~~~~~^~~~~~~~
Swiften/Parser/LibXMLParser.cpp:106:67: warning: unused parameter 'error' [-Wunused-parameter]
   106 | static void handleStructuredError(void *userData, const xmlError *error) {
       |                                                   ~~~~~~~~~~~~~~~~^~~~~
Swiften/Parser/LibXMLParser.cpp: In constructor 'Swift::LibXMLParser::LibXMLParser(Swift::XMLParserClient*, bool)':
Swiften/Parser/LibXMLParser.cpp:116:44: error: invalid conversion from 'void (*)(void*, const xmlError*)' {aka 'void (*)(void*, const _xmlError*)'} to 'xmlStructuredErrorFunc' {aka 'void (*)(void*, _xmlError*)'} [-fpermissive]
   116 |         xmlSetStructuredErrorFunc(nullptr, handleStructuredError);
       |                                            ^~~~~~~~~~~~~~~~~~~~~
       |                                            |
       |                                            void (*)(void*, const xmlError*) {aka void (*)(void*, const _xmlError*)}
In file included from /usr/include/libxml2/libxml/valid.h:15,
                  from /usr/include/libxml2/libxml/parser.h:19,
                  from Swiften/Parser/LibXMLParser.cpp:15:
/usr/include/libxml2/libxml/xmlerror.h:870:57: note:   initializing argument 2 of 'void xmlSetStructuredErrorFunc(void*, xmlStructuredErrorFunc)'
   870 |                                  xmlStructuredErrorFunc handler);
       |                                  ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
scons: *** [Swiften/Parser/LibXMLParser.os] Error 1
scons: building terminated because of errors.
make[1]: *** [debian/rules:39: override_dh_auto_build] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:34: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------

The above is just how the build ends and not necessarily the most relevant part.
If required, the full build log is available here:

https://people.debian.org/~sanvila/build-logs/202411/

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.