[Bug c++/84299] New: warning: '' may be used uninitialized in this function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84299 Bug ID: 84299 Summary: warning: '' may be used uninitialized in this function Product: gcc Version: 8.0.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: bugzilla at cpockrandt dot de Target Milestone: --- The warnings appeared between versions 8.0.1.s20180121 and 8.0.1.s20180128. The attached *.ii file was produced by g++8 (FreeBSD Ports Collection) 8.0.1 20180128 (experimental) /usr/local/bin/g++8 -DSEQAN_DISABLE_VERSION_CHECK -DSEQAN_ENABLE_TESTING=1 -DSEQAN_HAS_BZIP2=1 -DSEQAN_HAS_EXECINFO=1 -DSEQAN_HAS_OPENMP=1 -DSEQAN_HAS_ZLIB=1 -D_FILE_OFFSET_BITS=64 -D_GLIBCXX_USE_C99=1 -D_LARGEFILE_SOURCE -I/home/mi/cpockrandt/seqan/include -save-temps -W -Wall -pedantic -fopenmp -O3 -DSEQAN_GLOBAL_EXCEPTION_HANDLER=1 -o CMakeFiles/test_index_vstree.dir/test_index_vstree.cpp.o -c /home/mi/cpockrandt/seqan/tests/index/test_index_vstree.cpp In file included from /home/mi/cpockrandt/seqan/include/seqan/basic/basic_iterator.h:80, from /home/mi/cpockrandt/seqan/include/seqan/basic.h:86, from /home/mi/cpockrandt/seqan/include/seqan/sequence.h:74, from /home/mi/cpockrandt/seqan/tests/index/test_index_vstree.cpp:1: /home/mi/cpockrandt/seqan/include/seqan/basic/iterator_adaptor.h: In function 'int main()': /home/mi/cpockrandt/seqan/include/seqan/basic/iterator_adaptor.h:102:9: warning: '' may be used uninitialized in this function [-Wmaybe-uninitialized] data_iterator = TIterator(); ^ Interestingly this error occurs only with -O3, not without optimization. I tried to reduce the code as much as possible but wasn't very successful with delta & co. It is still quite big, so I uploaded it elsewhere. http://www.inf.fu-berlin.de/users/cpockrandt/test_index_vstree.ii (6.4 MB). It might also be a duplicate: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84078
[Bug c++/83739] [8 Regression] error: range-based 'for' expression of type 'auto' has incomplete type
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83739 --- Comment #5 from Chris --- (In reply to Chris from comment #4) > This is the intermediate file of the most simplified code that I came up > with that reproduces the error (1.9 MB) > > http://www.inf.fu-berlin.de/users/cpockrandt/test_find2_index_approx2.ii (In reply to Andrew Pinski from comment #3) > (In reply to Jonathan Wakely from comment #2) > > There's no way all that code is relevant to the problem. > > > > https://gcc.gnu.org/wiki/A_guide_to_testcase_reduction > > Note one method which is not mentioned here when there is a regression in > rejecting valid code is to test the older working compiler too. > > So a testing "bash" script (which returns 0 when the test should be accepted > but is not currently, and non zero otherwise) would look something like: > > if old-gcc $1; then > exit 1 > fi > > if gcc $1; then > exit 0 > fi > > exit 1 > CUT --- > And then you use that with delta or otherwise. Thanks! I'll apply this for reducing the code at the end of the week when I got more time!
[Bug c++/83739] [8 Regression] error: range-based 'for' expression of type 'auto' has incomplete type
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83739 --- Comment #4 from Chris --- This is the intermediate file of the most simplified code that I came up with that reproduces the error (1.9 MB) http://www.inf.fu-berlin.de/users/cpockrandt/test_find2_index_approx2.ii
[Bug c++/83739] error: range-based 'for' expression of type 'auto' has incomplete type
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83739 --- Comment #1 from Chris --- Sorry, the ii-file is too large to post it here, I uploaded it instead somewhere else (7.7 MB): www.inf.fu-berlin.de/users/cpockrandt/test_find2_index_approx.ii
[Bug c++/83739] New: error: range-based 'for' expression of type 'auto' has incomplete type
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83739 Bug ID: 83739 Summary: error: range-based 'for' expression of type 'auto' has incomplete type Product: gcc Version: 8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: bugzilla at cpockrandt dot de Target Milestone: --- Compiler/OS information: g++8 (FreeBSD Ports Collection) 8.0.0 20171224 (experimental) Error-Message (see below for complete output): /home/mi/user/seqan/tests/index/test_find2_index_approx.h:478:9: error: range-based 'for' expression of type 'auto' has incomplete type for (auto occ : getOccurrences(iter)) ^~~ Command: /usr/local/bin/g++8 -DSEQAN_DISABLE_VERSION_CHECK -DSEQAN_ENABLE_TESTING=1 -DSEQAN_HAS_BZIP2=1 -DSEQAN_HAS_EXECINFO=1 -DSEQAN_HAS_OPENMP=1 -DSEQAN_HAS_ZLIB=1 -D_FILE_OFFSET_BITS=64 -D_GLIBCXX_USE_C99=1 -D_LARGEFILE_SOURCE -I/home/mi/user/seqan/include -save-temps -W -Wall -pedantic -fno-omit-frame-pointer -fopenmp -g -DSEQAN_ENABLE_DEBUG=1 -DSEQAN_GLOBAL_EXCEPTION_HANDLER=1 -o CMakeFiles/test_find2_index_approx.dir/test_find2_index_approx.cpp.o -c /home/mi/user/seqan/tests/index/test_find2_index_approx.cpp It works with the latest versions of g++4, 5, 6 and 7 and clang. --- Complete output: [user@celegans ~/seqan-build]$ make VERBOSE=1 test_find2_index_approx /usr/local/bin/cmake -H/home/mi/user/seqan -B/home/mi/user/seqan-build --check-build-system CMakeFiles/Makefile.cmake 0 make -f CMakeFiles/Makefile2 test_find2_index_approx /usr/local/bin/cmake -H/home/mi/user/seqan -B/home/mi/user/seqan-build --check-build-system CMakeFiles/Makefile.cmake 0 /usr/local/bin/cmake -E cmake_progress_start /home/mi/user/seqan-build/CMakeFiles 0 make -f CMakeFiles/Makefile2 tests/index/CMakeFiles/test_find2_index_approx.dir/all make -f CMakeFiles/seqan_library.dir/build.make CMakeFiles/seqan_library.dir/depend cd /home/mi/user/seqan-build && /usr/local/bin/cmake -E cmake_depends "Unix Makefiles" /home/mi/user/seqan /home/mi/user/seqan /home/mi/user/seqan-build /home/mi/user/seqan-build /home/mi/user/seqan-build/CMakeFiles/seqan_library.dir/DependInfo.cmake --color= Dependee "/home/mi/user/seqan-build/CMakeFiles/seqan_library.dir/DependInfo.cmake" is newer than depender "/home/mi/user/seqan-build/CMakeFiles/seqan_library.dir/depend.internal". Dependee "/home/mi/user/seqan-build/CMakeFiles/CMakeDirectoryInformation.cmake" is newer than depender "/home/mi/user/seqan-build/CMakeFiles/seqan_library.dir/depend.internal". Scanning dependencies of target seqan_library make -f CMakeFiles/seqan_library.dir/build.make CMakeFiles/seqan_library.dir/build Built target seqan_library make -f tests/index/CMakeFiles/test_find2_index_approx.dir/build.make tests/index/CMakeFiles/test_find2_index_approx.dir/depend cd /home/mi/user/seqan-build && /usr/local/bin/cmake -E cmake_depends "Unix Makefiles" /home/mi/user/seqan /home/mi/user/seqan/tests/index /home/mi/user/seqan-build /home/mi/user/seqan-build/tests/index /home/mi/user/seqan-build/tests/index/CMakeFiles/test_find2_index_approx.dir/DependInfo.cmake --color= Dependee "/home/mi/user/seqan-build/tests/index/CMakeFiles/test_find2_index_approx.dir/DependInfo.cmake" is newer than depender "/home/mi/user/seqan-build/tests/index/CMakeFiles/test_find2_index_approx.dir/depend.internal". Dependee "/home/mi/user/seqan-build/tests/index/CMakeFiles/CMakeDirectoryInformation.cmake" is newer than depender "/home/mi/user/seqan-build/tests/index/CMakeFiles/test_find2_index_approx.dir/depend.internal". Scanning dependencies of target test_find2_index_approx make -f tests/index/CMakeFiles/test_find2_index_approx.dir/build.make tests/index/CMakeFiles/test_find2_index_approx.dir/build Building CXX object tests/index/CMakeFiles/test_find2_index_approx.dir/test_find2_index_approx.cpp.o cd /home/mi/user/seqan-build/tests/index && /usr/local/bin/g++8 -DSEQAN_DISABLE_VERSION_CHECK -DSEQAN_ENABLE_TESTING=1 -DSEQAN_HAS_BZIP2=1 -DSEQAN_HAS_EXECINFO=1 -DSEQAN_HAS_OPENMP=1 -DSEQAN_HAS_ZLIB=1 -D_FILE_OFFSET_BITS=64 -D_GLIBCXX_USE_C99=1 -D_LARGEFILE_SOURCE -I/home/mi/user/seqan/include -save-temps -W -Wall -pedantic -fno-omit-frame-pointer -fopenmp -g -DSEQAN_ENABLE_DEBUG=1 -DSEQAN_GLOBAL_EXCEPTION_HANDLER=1 -o CMakeFiles/test_find2_index_approx.dir/test_find2_index_approx.cpp.o -c /home/mi/user/seqan/tests/index/test_find2_index_approx.cpp In file included from /home/mi/user/seqan/tests/index/test_find2_index_approx.cpp:37: /home/mi/user/seqan/tests/index/test_find2_index_approx.h: In instantiation of 'void SEQAN_TEST_test_find2_index_approx_small_test() [with bool speed_up_dummy_to_prevent_compilation_of_unused_tests_ = true
