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
0	0	6 : View List ['std::__1::__map_iterator , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t>, std::__1::__tree_node , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t>, void>, long> >::operator++()', 'std::__1::map , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t, std::__1::less , std::__1::allocator > >, std::__1::allocator , std::__1::allocator > const, dnnl::impl::graph::utils::json::read_helper_t::entry_t> > >::end()', 'std::__1::__map_iterator , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t>, std::__1::__tree_node , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t>, void>, long> >::operator->() const', 'std::__1::operator!=(std::__1::__map_iterator , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t>, std::__1::__tree_node , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t>, void>, long> > const&, std::__1::__map_iterator , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t>, std::__1::__tree_node , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t>, void>, long> > const&)', 'std::__1::map , std::__1::allocator >, dnnl::impl::graph::utils::json::read_helper_t::entry_t, std::__1::less , std::__1::allocator > >, std::__1::allocator , std::__1::allocator > const, dnnl::impl::graph::utils::json::read_helper_t::entry_t> > >::begin()', 'std::__1::map , std::__1::allocator >, int, std::__1::less , std::__1::allocator > >, std::__1::allocator , std::__1::allocator > const, int> > >::count(std::__1::basic_string , std::__1::allocator > const&) const']	0	0	dnnl::impl::graph::utils::json::read_helper_t::read_fields(dnnl::impl::graph::utils::json::json_reader_t*)	call site: 00000	/src/oneDNN/src/graph/utils/json.hpp:570

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           dnnl::impl::graph::utils::json::json_reader_t::json_reader_t(std::__1::basic_istream
           
            >*)

[function] [call site] 00001


           dnnl::impl::graph::utils::json::read_helper_t::read_helper_t()

[function] [call site] 00002


           dnnl::impl::graph::utils::json::read_helper_t::read_fields(dnnl::impl::graph::utils::json::json_reader_t*)

[function] [call site] 00003


             dnnl::impl::graph::utils::json::json_reader_t::begin_object()

[function] [call site] 00004


               dnnl::impl::graph::utils::json::json_reader_t::next_nonspace()

[function] [call site] 00005


                 dnnl::impl::graph::utils::json::json_reader_t::next_char()

[function] [call site] 00006


                 isspace

[call site] 00007


             dnnl::impl::graph::utils::json::json_reader_t::next_object_item(std::__1::basic_string
             
              , std::__1::allocator
              
               >*)

[function] [call site] 00008


               dnnl::impl::graph::utils::json::json_reader_t::next_nonspace()

[function] [call site] 00009


               dnnl::impl::graph::utils::json::json_reader_t::peeknext_nonspace()

[function] [call site] 00010


                 dnnl::impl::graph::utils::json::json_reader_t::peeknext_char()

[function] [call site] 00011


                 isspace

[call site] 00012


                 dnnl::impl::graph::utils::json::json_reader_t::next_char()

[function] [call site] 00013


               dnnl::impl::graph::utils::json::json_reader_t::next_char()

[function] [call site] 00014


               dnnl::impl::graph::utils::json::json_reader_t::read_string(std::__1::basic_string
               
                , std::__1::allocator
                
                 >*)

[function] [call site] 00015


                 dnnl::impl::graph::utils::json::json_reader_t::next_nonspace()

[function] [call site] 00016


                 dnnl::impl::graph::utils::json::json_reader_t::next_char()

[function] [call site] 00017


                 dnnl::impl::graph::utils::json::json_reader_t::next_char()

[function] [call site] 00018


                 __cxa_allocate_exception

[call site] 00019


                 __cxa_allocate_exception

[call site] 00020


               dnnl::impl::graph::utils::json::json_reader_t::next_nonspace()

[function] [call site] 00021


           __cxa_begin_catch

[call site] 00022


           __cxa_end_catch

[call site] 00023


           dnnl::impl::graph::utils::json::read_helper_t::~read_helper_t()

[function] [call site] 00024