Lupdate crashes with segmentation fault

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7994fa5 in QString::append(QString const&) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
(gdb) bt
#0  0x00007ffff7994fa5 in QString::append(QString const&) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00005555555af343 in QString::operator+= (s=..., this=0x7fffffffd3e0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:569
#2  CppParser::handleTr (this=this@entry=0x7fffffffd380, prefix=..., plural=false) at cpp.cpp:1514
#3  0x00005555555b304e in CppParser::parseInternal (this=this@entry=0x7fffffffd380, cd=..., includeStack=..., inclusions=...) at cpp.cpp:1935
#4  0x00005555555b3a90 in CppParser::parse (this=this@entry=0x7fffffffd380, cd=..., includeStack=..., inclusions=...) at cpp.cpp:1666
#5  0x00005555555b3c93 in loadCPP (translator=..., filenames=..., cd=...) at cpp.cpp:2251
#6  0x000055555559a578 in processSources (fetchedTor=..., sourceFiles=..., cd=...) at main.cpp:516
#7  0x0000555555571e5b in main (argc=<optimized out>, argv=<optimized out>) at main.cpp:1000
(gdb) frame 0
#0  0x00007ffff7994fa5 in QString::append(QString const&) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
(gdb) info args
No symbol table info available.
(gdb) info locals
No symbol table info available.
(gdb) frame 1
#1  0x00005555555af343 in QString::operator+= (s=..., this=0x7fffffffd3e0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:569
569         inline QString &operator+=(const QString &s) { return append(s); }
(gdb) info args
s = <optimized out>
this = 0x7fffffffd3e0
(gdb) frame 2
#2  CppParser::handleTr (this=this@entry=0x7fffffffd380, prefix=..., plural=false) at cpp.cpp:1514
1514    cpp.cpp: No such file or directory.
(gdb) info args
this = 0x7fffffffd380
prefix = @0x7fffffffd240: {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}
plural = false
(gdb) info locals
i = <optimized out>
idx = <optimized out>
fctx = 0x5555556e8058
line = 26
(gdb) frame 3
#3  0x00005555555b304e in CppParser::parseInternal (this=this@entry=0x7fffffffd380, cd=..., includeStack=..., inclusions=...) at cpp.cpp:1935
1935    in cpp.cpp
(gdb) info args
this = 0x7fffffffd380
cd = @0x7fffffffd860: {m_defaultContext = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, m_sourceIsUtf16 = false, m_unTrPrefix = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, m_sourceFileName = {static null = {<No data fields>}, 
    d = 0x55555562f950}, m_targetFileName = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, m_excludes = {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {
                    static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}, m_sourceDir = {d_ptr = {d = 0x55555563bed0}}, 
  m_targetDir = {d_ptr = {d = 0x55555563c3e0}}, m_projectRoots = {q_hash = {{d = 0x555555630e50, e = 0x555555630e50}}}, m_allCSources = {<QHash<QString, QString>> = {{d = 0x7ffff7be93e0 <QHashData::shared_null>, e = 0x7ffff7be93e0 <QHashData::shared_null>}}, <No data fields>}, 
  m_includePath = {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, 
          d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}, m_dropTags = {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {
                    static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}, 
  m_errors = {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, 
          d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}, m_verbose = false, m_ignoreUnfinished = false, m_sortContexts = false, m_noUiLines = false, m_idBased = false, m_saveMode = SaveEverything}
includeStack = @0x7fffffffd328: {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, 
          array = {0x0}}, d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}
inclusions = @0x7fffffffd320: {q_hash = {{d = 0x7ffff7be93e0 <QHashData::shared_null>, e = 0x7ffff7be93e0 <QHashData::shared_null>}}}
(gdb) info locals
forcePlural = <optimized out>
strColons = {static null = {<No data fields>}, d = 0x555555643850}
prefix = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}
yyTokColonSeen = false
yyTokIdentSeen = false
(gdb) frame 4
#4  0x00005555555b3a90 in CppParser::parse (this=this@entry=0x7fffffffd380, cd=..., includeStack=..., inclusions=...) at cpp.cpp:1666
1666    in cpp.cpp
(gdb) info args
this = 0x7fffffffd380
cd = @0x7fffffffd860: {m_defaultContext = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, m_sourceIsUtf16 = false, m_unTrPrefix = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, m_sourceFileName = {static null = {<No data fields>}, 
    d = 0x55555562f950}, m_targetFileName = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, m_excludes = {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {
                    static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}, m_sourceDir = {d_ptr = {d = 0x55555563bed0}}, 
  m_targetDir = {d_ptr = {d = 0x55555563c3e0}}, m_projectRoots = {q_hash = {{d = 0x555555630e50, e = 0x555555630e50}}}, m_allCSources = {<QHash<QString, QString>> = {{d = 0x7ffff7be93e0 <QHashData::shared_null>, e = 0x7ffff7be93e0 <QHashData::shared_null>}}, <No data fields>}, 
  m_includePath = {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, 
          d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}, m_dropTags = {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {
                    static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}, 
  m_errors = {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, 
          d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}, m_verbose = false, m_ignoreUnfinished = false, m_sortContexts = false, m_noUiLines = false, m_idBased = false, m_saveMode = SaveEverything}
includeStack = @0x7fffffffd328: {<QList<QString>> = {<QListSpecialMethods<QString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, 
          array = {0x0}}, d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, <No data fields>}
inclusions = @0x7fffffffd320: {q_hash = {{d = 0x7ffff7be93e0 <QHashData::shared_null>, e = 0x7ffff7be93e0 <QHashData::shared_null>}}}
(gdb) info locals
No locals.
(gdb) frame 2
#2  CppParser::handleTr (this=this@entry=0x7fffffffd380, prefix=..., plural=false) at cpp.cpp:1514
1514    in cpp.cpp
(gdb) p *this
$3 = {yyFileName = {static null = {<No data fields>}, d = 0x55555563e890}, yyCh = 59, yyAtNewline = false, yyWord = {static null = {<No data fields>}, d = 0x5555556eb200}, yyIfdefStack = {<QVector<CppParser::IfdefState>> = {d = 0x55555563e180}, <No data fields>}, yyBracketDepth = 0, yyBraceDepth = 3, 
  yyParenDepth = 0, yyLineNo = 26, yyCurLineNo = 26, yyBracketLineNo = 1, yyBraceLineNo = 12, yyParenLineNo = 26, yySourceCodec = 0x55555562dd90, yyInStr = {static null = {<No data fields>}, d = 0x5555556e8380}, yyInPtr = 0x5555556e884e, yyTok = CppParser::Tok_RightParen, metaExpected = true, 
  context = {static null = {<No data fields>}, d = 0x5555556e8000}, text = {static null = {<No data fields>}, d = 0x5555556ebb40}, comment = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, extracomment = {static null = {<No data fields>}, 
    d = 0x7ffff7be8960 <QArrayData::shared_null>}, msgid = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, sourcetext = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, extra = {{d = 0x7ffff7be93e0 <QHashData::shared_null>, 
      e = 0x7ffff7be93e0 <QHashData::shared_null>}}, namespaces = {<QListSpecialMethods<HashString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, 
          begin = 0, end = 0, array = {0x0}}, d = 0x5555556e9820}, d = 0x5555556e9820}}, namespaceDepths = {<QVector<int>> = {d = 0x5555556e8a70}, <No data fields>}, functionContext = {<QListSpecialMethods<HashString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {
              _q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x5555556e9820}, d = 0x5555556e9820}}, functionContextUnresolved = {static null = {<No data fields>}, 
    d = 0x7ffff7be8960 <QArrayData::shared_null>}, prospectiveContext = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, pendingContext = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, results = 0x5555556e8050, tor = 0x5555556db1d0, 
  directInclude = false, savedState = {namespaces = {<QListSpecialMethods<HashString>> = {<No data fields>}, {p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, 
            array = {0x0}}, d = 0x7ffff7be9470 <QListData::shared_null>}, d = 0x7ffff7be9470 <QListData::shared_null>}}, namespaceDepths = {<QVector<int>> = {d = 0x7ffff7be8960 <QArrayData::shared_null>}, <No data fields>}, functionContext = {<QListSpecialMethods<HashString>> = {<No data fields>}, {
        p = {static shared_null = {ref = {atomic = {_q_value = {<std::__atomic_base<int>> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x7ffff7be9470 <QListData::shared_null>}, 
        d = 0x7ffff7be9470 <QListData::shared_null>}}, functionContextUnresolved = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}, pendingContext = {static null = {<No data fields>}, d = 0x7ffff7be8960 <QArrayData::shared_null>}}, yyMinBraceDepth = 0, 
  inDefine = false}