test SIGSEGV on i386

[zhsj]

https://buildd.debian.org/status/fetch.php?pkg=libime&arch=i386&ver=0.0%7Egit20200310.fdce632-1&stamp=1584041540&raw=0

Only failed on i386.

	  9 - testdecoder (SEGFAULT)
	 10 - testpinyincontext (Child aborted)
	 11 - testpinyindictionary (SEGFAULT)

For testdecoder, the backtrace is

(gdb) r
Starting program: /build/libime-Mbrauo/libime/build/test/testdecoder 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0xf7d3aff1 in libime::DATriePrivate<float, true, 1>::suffix(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, unsigned int, libime::DATriePrivate<float, true, 1>::npos_t) const () from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
(gdb) bt
#0  0xf7d3aff1 in libime::DATriePrivate<float, true, 1>::suffix(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, unsigned int, libime::DATriePrivate<float, true, 1>::npos_t) const () from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
#1  0xf7d370ff in libime::DATrie<float>::suffix(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, unsigned int, unsigned long long) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
#2  0xf7f2458a in libime::matchWordsOnTrie<libime::PinyinDictionaryPrivate::matchWordsForOnePath(libime::PinyinMatchContext const&, libime::MatchedPinyinPath const&) const::{lambda(std::basic_string_view<char, std::char_traits<char> >, std::basic_string_view<char, std::char_traits<char> >, float)#2}>(libime::MatchedPinyinPath const&, libime::PinyinDictionaryPrivate::matchWordsForOnePath(libime::PinyinMatchContext const&, libime::MatchedPinyinPath const&) const::{lambda(std::basic_string_view<char, std::char_traits<char> >, std::basic_string_view<char, std::char_traits<char> >, float)#2} const&)::{lambda(float, unsigned int, unsigned long long)#1}::operator()(float, unsigned int, unsigned long long) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/pinyin/libIMEPinyin.so.0
#3  0xf7f24f76 in std::_Function_handler<bool (float, unsigned int, unsigned long long), libime::matchWordsOnTrie<libime::PinyinDictionaryPrivate::matchWordsForOnePath(libime::PinyinMatchContext const&, libime::MatchedPinyinPath const&) const::{lambda(std::basic_string_view<char, std::char_traits<char> >, std::basic_string_view<char, std::char_traits<char> >, float)#2}>(libime::MatchedPinyinPath const&, libime::PinyinDictionaryPrivate::matchWordsForOnePath(libime::PinyinMatchContext const&, libime::MatchedPinyinPath const&) const::{lambda(std::basic_string_view<char, std::char_traits<char> >, std::basic_string_view<char, std::char_traits<char> >, float)#2} const&)::{lambda(float, unsigned int, unsigned long long)#1}>::_M_invoke(std::_Any_data const&, float&&, unsigned int&&, unsigned long long&&) () from /build/libime-Mbrauo/libime/build/src/libime/pinyin/libIMEPinyin.so.0
#4  0xf7d41ec2 in std::function<bool (float, unsigned int, unsigned long long)>::operator()(float, unsigned int, unsigned long long) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
#5  0xf7d3bac6 in libime::DATriePrivate<float, true, 1>::foreach(std::function<bool (float, unsigned int, unsigned long long)>, libime::DATriePrivate<float, true, 1>::npos_t) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
#6  0xf7d376a1 in libime::DATrie<float>::foreach(std::function<bool (float, unsigned int, unsigned long long)>, unsigned long long) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
#7  0xf7f247be in void libime::matchWordsOnTrie<libime::PinyinDictionaryPrivate::matchWordsForOnePath(libime::PinyinMatchContext const&, libime::MatchedPinyinPath const&) const::{lambda(std::basic_string_view<char, std::char_traits<char> >, std::basic_string_view<char, std::char_traits<char> >, float)#2}>(libime::MatchedPinyinPath const&, libime::PinyinDictionaryPrivate::matchWordsForOnePath(libime::PinyinMatchContext const&, libime::MatchedPinyinPath const&) const::{lambda(std::basic_string_view<char, std::char_traits<char> >, std::basic_string_view<char, std::char_traits<char> >, float)#2} const&) () from /build/libime-Mbrauo/libime/build/src/libime/pinyin/libIMEPinyin.so.0
#8  0xf7f21bd8 in libime::PinyinDictionaryPrivate::matchWordsForOnePath(libime::PinyinMatchContext const&, libime::MatchedPinyinPath const&) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/pinyin/libIMEPinyin.so.0
#9  0xf7f21cb2 in libime::PinyinDictionaryPrivate::matchWords(libime::PinyinMatchContext const&, std::vector<libime::MatchedPinyinPath, std::allocator<libime::MatchedPinyinPath> > const&) const () from /build/libime-Mbrauo/libime/build/src/libime/pinyin/libIMEPinyin.so.0
#10 0xf7f224a3 in libime::PinyinDictionaryPrivate::findMatchesBetween(libime::PinyinMatchContext const&, libime::SegmentGraphNode const&, libime::SegmentGraphNode const&, std::vector<libime::MatchedPinyinPath, std::allocator<libime::MatchedPinyinPath> >&) const () from /build/libime-Mbrauo/libime/build/src/libime/pinyin/libIMEPinyin.so.0
#11 0xf7f228d4 in libime::PinyinDictionaryPrivate::matchNode(libime::PinyinMatchContext const&, libime::SegmentGraphNode const&) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/pinyin/libIMEPinyin.so.0
#12 0xf7f22b58 in libime::PinyinDictionary::matchPrefixImpl(libime::SegmentGraph const&, std::function<void (std::vector<libime::SegmentGraphNode const*, std::allocator<libime::SegmentGraphNode const*> > const&, libime::WordNode&, float, std::unique_ptr<libime::LatticeNodeData, std::default_delete<libime::LatticeNodeData> >)> const&, std::unordered_set<libime::SegmentGraphNode const*, std::hash<libime::SegmentGraphNode const*>, std::equal_to<libime::SegmentGraphNode const*>, std::allocator<libime::SegmentGraphNode const*> > const&, void*) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/pinyin/libIMEPinyin.so.0
#13 0xf7d59c3f in libime::Dictionary::matchPrefix(libime::SegmentGraph const&, std::function<void (std::vector<libime::SegmentGraphNode const*, std::allocator<libime::SegmentGraphNode const*> > const&, libime::WordNode&, float, std::unique_ptr<libime::LatticeNodeData, std::default_delete<libime::LatticeNodeData> >)> const&, std::unordered_set<libime::SegmentGraphNode const*, std::hash<libime::SegmentGraphNode const*>, std::equal_to<libime::SegmentGraphNode const*>, std::allocator<libime::SegmentGraphNode const*> > const&, void*) const ()
   from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
#14 0xf7d55698 in libime::DecoderPrivate::buildLattice(libime::Decoder const*, libime::Lattice&, std::unordered_set<libime::SegmentGraphNode const*, std::hash<libime::SegmentGraphNode const*>, std::equal_to<libime::SegmentGraphNode const*>, std::allocator<libime::SegmentGraphNode const*> > const&, std::array<char, 24u> const&, libime::SegmentGraph const&, unsigned int, void*) const () from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
#15 0xf7d56b73 in libime::Decoder::decode(libime::Lattice&, libime::SegmentGraph const&, unsigned int, std::array<char, 24u> const&, float, float, unsigned int, unsigned int, void*) const
    () from /build/libime-Mbrauo/libime/build/src/libime/core/libIMECore.so.0
#16 0x5655e6bd in testTime(libime::PinyinDictionary&, libime::Decoder&, char const*, fcitx::Flags<libime::PinyinFuzzyFlag>, int) ()
#17 0x5655ea2c in main ()
(gdb) 

[karuboniru]

Same on Fedora 32 and rawhide, tested with/without LTO, the build log containing the error can be found here

• libime commit: a108d15b06f0885f2fcc95d035614665392bc83b
• kenlm commit: 96d303cfb1a0c21b8f060dbad640d7ab301c019a
• gcc-c++ version: 10.2.1