Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity	Unique Reachable Complexities	Unique Reachable Functions	All non-covered Complexity	All Reachable Complexity	Function Name	Function Callsite	Blocked Branch
10	10	4 : View List ['__cxa_allocate_exception', 'std::out_of_range::out_of_range[abi:v180000](char const*)', '__cxa_free_exception', '__cxa_throw']	10	10	read_bits(unsignedcharconst*&,unsignedlong&,unsignedlong&,unsignedlong)	call site: 00000	/src/qpdf/libqpdf/qpdf/bits_functions.hh:34
10	10	4 : View List ['__cxa_allocate_exception', 'std::out_of_range::out_of_range[abi:v180000](char const*)', '__cxa_free_exception', '__cxa_throw']	10	10	write_bits(unsignedchar&,unsignedlong&,unsignedlonglong,unsignedlong,Pipeline*)	call site: 00000	/src/qpdf/libqpdf/qpdf/bits_functions.hh:89
8	8	4 : View List ['__cxa_allocate_exception', 'std::runtime_error::runtime_error(char const*)', '__cxa_free_exception', '__cxa_throw']	8	8	BitStream::reset()	call site: 00000	/src/qpdf/libqpdf/BitStream.cc:21
0	0	None	8	10	Pl_TIFFPredictor::Pl_TIFFPredictor(charconst,Pipeline,Pl_TIFFPredictor::action_e,unsignedint,unsignedint,unsignedint)	call site: 00000	/src/qpdf/libqpdf/Pl_TIFFPredictor.cc:29
0	0	None	8	10	Pl_TIFFPredictor::Pl_TIFFPredictor(charconst,Pipeline,Pl_TIFFPredictor::action_e,unsignedint,unsignedint,unsignedint)	call site: 00000	/src/qpdf/libqpdf/Pl_TIFFPredictor.cc:32
0	0	None	8	10	Pl_TIFFPredictor::Pl_TIFFPredictor(charconst,Pipeline,Pl_TIFFPredictor::action_e,unsignedint,unsignedint,unsignedint)	call site: 00000	/src/qpdf/libqpdf/Pl_TIFFPredictor.cc:36
0	0	None	0	78	Pl_TIFFPredictor::processRow()	call site: 00000	/src/qpdf/libqpdf/Pl_TIFFPredictor.cc:83
0	0	None	0	0	Pl_TIFFPredictor::processRow()	call site: 00000	/src/qpdf/libqpdf/Pl_TIFFPredictor.cc:104

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           FuzzHelper::FuzzHelper(unsigned char const*, unsigned long)

[function] [call site] 00001


           FuzzHelper::run()

[function] [call site] 00002


             FuzzHelper::doChecks()

[function] [call site] 00003


               Pl_Discard::Pl_Discard()

[function] [call site] 00004


                 Pipeline::Pipeline(char const*, Pipeline*)

[function] [call site] 00005


               Pl_TIFFPredictor::Pl_TIFFPredictor(char const*, Pipeline*, Pl_TIFFPredictor::action_e, unsigned int, unsigned int, unsigned int)

[function] [call site] 00006


                 Pipeline::Pipeline(char const*, Pipeline*)

[function] [call site] 00007


                 Pipeline::getNext(bool)

[function] [call site] 00008


                   __cxa_allocate_exception

[call site] 00009


                 __cxa_allocate_exception

[call site] 00010


                 __cxa_allocate_exception

[call site] 00011


                 __cxa_allocate_exception

[call site] 00012


                 __cxa_allocate_exception

[call site] 00013


                 Pipeline::~Pipeline()

[function] [call site] 00014


               Pl_TIFFPredictor::write(unsigned char const*, unsigned long)

[function] [call site] 00015


                 Pl_TIFFPredictor::processRow()

[function] [call site] 00016


                   QTC::TC(char const*, char const*, int)

[function] [call site] 00017


                   BitWriter::BitWriter(Pipeline*)

[function] [call site] 00018


                   BitStream::BitStream(unsigned char const*, unsigned long)

[function] [call site] 00019


                     BitStream::reset()

[function] [call site] 00020


                       unsigned int QIntC::to_uint<unsigned long>(unsigned long const&)

[function] [call site] 00021


                         QIntC::IntConverter<unsigned long, unsigned int, false, false>::convert(unsigned long const&)

[function] [call site] 00022


                           QIntC::IntConverter<unsigned long, unsigned int, false, false>::error(unsigned long)

[function] [call site] 00023


                             __cxa_allocate_exception

[call site] 00024


                             std::range_error::range_error[abi:v180000](std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

[function] [call site] 00025


                               std::runtime_error::runtime_error(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

[call site] 00026


                       __cxa_allocate_exception

[call site] 00027


                   BitStream::getBitsSigned(unsigned long)

[function] [call site] 00028


                     read_bits(unsigned char const*&, unsigned long&, unsigned long&, unsigned long)

[function] [call site] 00029


                       __cxa_allocate_exception

[call site] 00030


                       std::out_of_range::out_of_range[abi:v180000](char const*)

[function] [call site] 00031


                         std::logic_error::logic_error(char const*)

[call site] 00032


                   BitWriter::writeBitsSigned(long long, unsigned long)

[function] [call site] 00033


                     BitWriter::writeBits(unsigned long long, unsigned long)

[function] [call site] 00034


                       write_bits(unsigned char&, unsigned long&, unsigned long long, unsigned long, Pipeline*)

[function] [call site] 00035


                         __cxa_allocate_exception

[call site] 00036


                         std::out_of_range::out_of_range[abi:v180000](char const*)

[function] [call site] 00037


                   BitWriter::flush()

[function] [call site] 00038


                     write_bits(unsigned char&, unsigned long&, unsigned long long, unsigned long, Pipeline*)

[function] [call site] 00039


               Pl_TIFFPredictor::finish()

[function] [call site] 00040


                 Pl_TIFFPredictor::processRow()

[function] [call site] 00041


               Pl_TIFFPredictor::Pl_TIFFPredictor(char const*, Pipeline*, Pl_TIFFPredictor::action_e, unsigned int, unsigned int, unsigned int)

[function] [call site] 00042


               Pl_TIFFPredictor::write(unsigned char const*, unsigned long)

[function] [call site] 00043


               Pl_TIFFPredictor::finish()

[function] [call site] 00044


               Pl_TIFFPredictor::~Pl_TIFFPredictor()

[function] [call site] 00045


                 Pipeline::~Pipeline()

[function] [call site] 00046


               Pl_Discard::~Pl_Discard()

[function] [call site] 00047


                 Pipeline::~Pipeline()

[function] [call site] 00048


             __cxa_begin_catch

[call site] 00049


             __cxa_end_catch

[call site] 00050