Stack Overflow in SingleDocParser::HandleFlowMap()

position：code

poc

To reproduce: ./parse < crash9.txt

gdb:
Program received signal SIGSEGV, Segmentation fault.
0x08081d5d in YAML::SingleDocParser::HandleFlowMap(YAML::EventHandler&) ()

ASAN:
ASAN:DEADLYSIGNAL
================================================================= ==6596==ERROR: AddressSanitizer: stack-overflow on address 0xbf09dee0 (pc 0x0814e423 bp 0xbf09e308 sp 0xbf09ded0 T0)
#0 0x814e422 (/home/user/yaml-cpp/build/util/parse+0x814e422)
#1 0x816fd48 (/home/user/yaml-cpp/build/util/parse+0x816fd48)
#2 0x8190a72 (/home/user/yaml-cpp/build/util/parse+0x8190a72)
#3 0x81d5061 (/home/user/yaml-cpp/build/util/parse+0x81d5061)
#4 0x81deb85 (/home/user/yaml-cpp/build/util/parse+0x81deb85)
#5 0x81d511a (/home/user/yaml-cpp/build/util/parse+0x81d511a)
#6 0x81deb85 (/home/user/yaml-cpp/build/util/parse+0x81deb85)
#7 0x81d511a (/home/user/yaml-cpp/build/util/parse+0x81d511a)
#8 0x81deb85 (/home/user/yaml-cpp/build/util/parse+0x81deb85)
#9 0x81d511a (/home/user/yaml-cpp/build/util/parse+0x81d511a)
#10 0x81deb85 (/home/user/yaml-cpp/build/util/parse+0x81deb85)
......
#247 0x81d511a (/home/user/yaml-cpp/build/util/parse+0x81d511a)
#248 0x81deb85 (/home/user/yaml-cpp/build/util/parse+0x81deb85)
#249 0x81d511a (/home/user/yaml-cpp/build/util/parse+0x81d511a)
#250 0x81deb85 (/home/user/yaml-cpp/build/util/parse+0x81deb85)
SUMMARY: AddressSanitizer: stack-overflow (/home/user/yaml-cpp/build/util/parse+0x814e422) ==6596==ABORTING