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
38	38	1 : View List ['inflateInit_']	370	945	Pl_Flate::handleData(unsignedcharconst*,unsignedlong,int)	call site: 00000	/src/qpdf/libqpdf/Pl_Flate.cc:131
21	21	1 : View List ['crc32']	579	630	deflate	call site: 00083	/src/zlib/deflate.c:1160
21	21	1 : View List ['crc32']	21	21	read_buf	call site: 00091	/src/zlib/deflate.c:227
16	37	3 : View List ['deflateEnd', '__clang_call_terminate', 'inflateEnd']	16	37	Pl_Flate::Members::~Members()	call site: 00000	/src/qpdf/libqpdf/Pl_Flate.cc:46
12	12	1 : View List ['inflateEnd']	32	125	Pl_Flate::finish()	call site: 00000	/src/qpdf/libqpdf/Pl_Flate.cc:218
8	8	4 : View List ['__cxa_allocate_exception', 'std::runtime_error::runtime_error(char const*)', '__cxa_free_exception', '__cxa_throw']	8	8	Pl_Flate::Members::Members(unsignedlong,Pl_Flate::action_e)	call site: 00000	/src/qpdf/libqpdf/Pl_Flate.cc:29
8	8	13 : View List ['__cxa_allocate_exception', 'std::__1::basic_string , std::__1::allocator > std::__1::operator+[abi:v180000] , std::__1::allocator >(std::__1::basic_string , std::__1::allocator >&&, char const)', 'std::__1::basic_string , std::__1::allocator > std::__1::operator+[abi:v180000] , std::__1::allocator >(std::__1::basic_string , std::__1::allocator >&&, std::__1::basic_string , std::__1::allocator >&&)', 'std::__1::basic_string , std::__1::allocator >::~basic_string()', 'std::__1::shared_ptr ::operator->[abi:v180000]() const', 'std::__1::basic_string , std::__1::allocator >::operator+=[abi:v180000](char const)', 'std::runtime_error::runtime_error(std::__1::basic_string , std::__1::allocator > const&)', '__cxa_free_exception', '__cxa_throw', '_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2B7v180000ILi0EEEPKc', 'std::__1::to_string(int)', 'std::__1::basic_string , std::__1::allocator > std::__1::operator+[abi:v180000] , std::__1::allocator >(std::__1::basic_string , std::__1::allocator > const&, char const*)', 'std::__1::basic_string , std::__1::allocator >::operator+=[abi:v180000](std::__1::basic_string , std::__1::allocator > const&)']	8	8	Pl_Flate::checkError(charconst*,int)	call site: 00000	/src/qpdf/libqpdf/Pl_Flate.cc:250
7	14	2 : View List ['_tr_stored_block', '_tr_align']	7	38	deflate	call site: 00128	/src/zlib/deflate.c:1211
0	21	1 : View List ['deflateEnd']	0	21	deflateInit2_	call site: 00026	/src/zlib/deflate.c:499
0	0	None	747	869	deflate	call site: 00064	/src/zlib/deflate.c:1009
0	0	None	747	869	deflate	call site: 00064	/src/zlib/deflate.c:1011
0	0	None	747	869	deflate	call site: 00064	/src/zlib/deflate.c:1013

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_Flate::Pl_Flate(char const*, Pipeline*, Pl_Flate::action_e, unsigned int)

[function] [call site] 00006


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

[function] [call site] 00007


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

[function] [call site] 00008


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

[function] [call site] 00009


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

[function] [call site] 00010


                       __cxa_allocate_exception

[call site] 00011


                       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] 00012


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

[call site] 00013


                 Pl_Flate::Members::Members(unsigned long, Pl_Flate::action_e)

[function] [call site] 00014


                   std::__1::shared_ptr<unsigned char> QUtil::make_shared_array<unsigned char>(unsigned long)

[function] [call site] 00015


                   __cxa_allocate_exception

[call site] 00016


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

[function] [call site] 00017


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

[function] [call site] 00018


                 Pipeline::~Pipeline()

[function] [call site] 00019


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

[function] [call site] 00020


                 __cxa_allocate_exception

[call site] 00021


                 Pl_Flate::handleData(unsigned char const*, unsigned long, int)

[function] [call site] 00022


                   __cxa_allocate_exception

[call site] 00023


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

[function] [call site] 00024


                   deflateInit_

[function] [call site] 00025


                     deflateInit2_

[function] [call site] 00026


                       deflateEnd

[function] [call site] 00027


                         deflateStateCheck

[function] [call site] 00028


                       deflateReset

[function] [call site] 00029


                         deflateResetKeep

[function] [call site] 00030


                           deflateStateCheck

[function] [call site] 00031


                           crc32

[function] [call site] 00032


                             crc32_z

[function] [call site] 00033


                               crc_word

[function] [call site] 00034


                               crc_word

[function] [call site] 00035


                               crc_word

[function] [call site] 00036


                               crc_word

[function] [call site] 00037


                               crc_word

[function] [call site] 00038


                               byte_swap

[function] [call site] 00039


                               crc_word_big

[function] [call site] 00040


                               crc_word_big

[function] [call site] 00041


                               crc_word_big

[function] [call site] 00042


                               crc_word_big

[function] [call site] 00043


                               crc_word_big

[function] [call site] 00044


                               byte_swap

[function] [call site] 00045


                           adler32

[function] [call site] 00046


                             adler32_z

[function] [call site] 00047


                           _tr_init

[function] [call site] 00048


                             tr_static_init

[function] [call site] 00049


                             init_block

[function] [call site] 00050


                         lm_init

[function] [call site] 00051


                   inflateInit_

[function] [call site] 00052


                     inflateInit2_

[function] [call site] 00053


                       inflateReset2

[function] [call site] 00054


                         inflateStateCheck

[function] [call site] 00055


                         inflateReset

[function] [call site] 00056


                           inflateStateCheck

[function] [call site] 00057


                           inflateResetKeep

[function] [call site] 00058


                             inflateStateCheck

[function] [call site] 00059


                   Pl_Flate::checkError(char const*, int)

[function] [call site] 00060


                     __cxa_allocate_exception

[call site] 00061


                   deflate

[function] [call site] 00062


                     deflateStateCheck

[function] [call site] 00063


                     flush_pending

[function] [call site] 00064


                       _tr_flush_bits

[function] [call site] 00065


                         bi_flush

[function] [call site] 00066


                     putShortMSB

[function] [call site] 00067


                     putShortMSB

[function] [call site] 00068


                     putShortMSB

[function] [call site] 00069


                     adler32

[function] [call site] 00070


                     flush_pending

[function] [call site] 00071


                     crc32

[function] [call site] 00072


                     flush_pending

[function] [call site] 00073


                     crc32

[function] [call site] 00074


                     crc32

[function] [call site] 00075


                     flush_pending

[function] [call site] 00076


                     crc32

[function] [call site] 00077


                     crc32

[function] [call site] 00078


                     flush_pending

[function] [call site] 00079


                     crc32

[function] [call site] 00080


                     crc32

[function] [call site] 00081


                     flush_pending

[function] [call site] 00082


                     crc32

[function] [call site] 00083


                     flush_pending

[function] [call site] 00084


                     crc32

[function] [call site] 00085


                     flush_pending

[function] [call site] 00086


                     deflate_stored

[function] [call site] 00087


                       _tr_stored_block

[function] [call site] 00088


                         bi_windup

[function] [call site] 00089


                       flush_pending

[function] [call site] 00090


                       read_buf

[function] [call site] 00091


                         adler32

[function] [call site] 00092


                         crc32

[function] [call site] 00093


                       read_buf

[function] [call site] 00094


                       _tr_stored_block

[function] [call site] 00095


                       flush_pending

[function] [call site] 00096


                     deflate_huff

[function] [call site] 00097


                       fill_window

[function] [call site] 00098


                         slide_hash

[function] [call site] 00099


                         read_buf

[function] [call site] 00100


                       _tr_flush_block

[function] [call site] 00101


                         detect_data_type

[function] [call site] 00102


                         build_tree

[function] [call site] 00103


                           pqdownheap

[function] [call site] 00104


                           pqdownheap

[function] [call site] 00105


                           pqdownheap

[function] [call site] 00106


                           gen_bitlen

[function] [call site] 00107


                           gen_codes

[function] [call site] 00108


                             bi_reverse

[function] [call site] 00109


                         build_tree

[function] [call site] 00110


                         build_bl_tree

[function] [call site] 00111


                           scan_tree

[function] [call site] 00112


                           scan_tree

[function] [call site] 00113


                           build_tree

[function] [call site] 00114


                         _tr_stored_block

[function] [call site] 00115


                         compress_block

[function] [call site] 00116


                         send_all_trees

[function] [call site] 00117


                           send_tree

[function] [call site] 00118


                           send_tree

[function] [call site] 00119


                         compress_block

[function] [call site] 00120


                         init_block

[function] [call site] 00121


                         bi_windup

[function] [call site] 00122


                       flush_pending

[function] [call site] 00123


                       _tr_flush_block

[function] [call site] 00124


                       flush_pending

[function] [call site] 00125


                       _tr_flush_block

[function] [call site] 00126


                       flush_pending

[function] [call site] 00127


                     deflate_rle

[function] [call site] 00128


                       fill_window

[function] [call site] 00129


                       _tr_flush_block

[function] [call site] 00130


                       flush_pending

[function] [call site] 00131


                       _tr_flush_block

[function] [call site] 00132


                       flush_pending

[function] [call site] 00133


                       _tr_flush_block

[function] [call site] 00134


                       flush_pending

[function] [call site] 00135


                     _tr_align

[function] [call site] 00136


                       bi_flush

[function] [call site] 00137


                     _tr_stored_block

[function] [call site] 00138


                     flush_pending

[function] [call site] 00139


                     putShortMSB

[function] [call site] 00140


                     putShortMSB

[function] [call site] 00141


                     flush_pending

[function] [call site] 00142


                   inflate

[function] [call site] 00143


                     inflateStateCheck

[function] [call site] 00144


                     crc32

[function] [call site] 00145


                     crc32

[function] [call site] 00146


                     adler32

[function] [call site] 00147


                     crc32

[function] [call site] 00148


                     crc32

[function] [call site] 00149


                     crc32

[function] [call site] 00150


                     crc32

[function] [call site] 00151


                     crc32

[function] [call site] 00152


                     crc32

[function] [call site] 00153


                     crc32

[function] [call site] 00154


                     crc32

[function] [call site] 00155


                     adler32

[function] [call site] 00156


                     fixedtables

[function] [call site] 00157


                     inflate_table

[function] [call site] 00158


                     inflate_table

[function] [call site] 00159


                     inflate_table

[function] [call site] 00160


                     inflate_fast

[function] [call site] 00161


                     crc32

[function] [call site] 00162


                     adler32

[function] [call site] 00163


                     updatewindow

[function] [call site] 00164


                     crc32

[function] [call site] 00165


                     adler32

[function] [call site] 00166


                   strcmp

[call site] 00167


                   Pl_Flate::warn(char const*, int)

[function] [call site] 00168


                   unsigned long QIntC::to_ulong<unsigned long>(unsigned long const&)

[function] [call site] 00169


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

[function] [call site] 00170


                   __cxa_allocate_exception

[call site] 00171


                   Pipeline::getNext(bool)

[function] [call site] 00172


                     __cxa_allocate_exception

[call site] 00173


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

[function] [call site] 00174


                   Pl_Flate::checkError(char const*, int)

[function] [call site] 00175


               Pl_Flate::finish()

[function] [call site] 00176


                 Pl_Flate::handleData(unsigned char const*, unsigned long, int)

[function] [call site] 00177


                 deflateEnd

[function] [call site] 00178


                 __cxa_begin_catch

[call site] 00179


                 Pipeline::getNext(bool)

[function] [call site] 00180


                 inflateEnd

[function] [call site] 00181


                   inflateStateCheck

[function] [call site] 00182


                 Pl_Flate::checkError(char const*, int)

[function] [call site] 00183


                 __cxa_begin_catch

[call site] 00184


                 __cxa_end_catch

[call site] 00185


                 __cxa_allocate_exception

[call site] 00186


                 __cxa_end_catch

[call site] 00187


                 Pipeline::getNext(bool)

[function] [call site] 00188


               Pl_Flate::~Pl_Flate()

[function] [call site] 00189


                 Pipeline::~Pipeline()

[function] [call site] 00190


               Pl_Discard::~Pl_Discard()

[function] [call site] 00191


                 Pipeline::~Pipeline()

[function] [call site] 00192


             __cxa_begin_catch

[call site] 00193


             __cxa_end_catch

[call site] 00194