memo.float_value might change inside of hash_sum. In case it
flipped from false to true there, and the calculated sum is Inf,
memo.c might not be initialized at all. This is bad.
Found using memory sanitizer:
==55293==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x55dfb8d6c529 in rb_float_new_inline internal.h:1814:53
#1 0x55dfb8d1b30c in enum_sum enum.c:4017:18
#2 0x55dfb86d75ad in call_cfunc_m1 vm_insnhelper.c:2041:12
#3 0x55dfb864b141 in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11
#4 0x55dfb85e843d in vm_call_cfunc vm_insnhelper.c:2225:12
#5 0x55dfb85e08f3 in vm_call_method_each_type vm_insnhelper.c:2560:9 #6 0x55dfb85de9c7 in vm_call_method vm_insnhelper.c:2686:13
#7 0x55dfb849eac6 in vm_call_general vm_insnhelper.c:2730:12
#8 0x55dfb8686103 in vm_sendish vm_insnhelper.c:3623:11
#9 0x55dfb84dc29e in vm_exec_core insns.def:789:11
Added by shyouhei (Shyouhei Urabe) almost 5 years ago
memo.c might not always be initialized
memo.float_value might change inside of hash_sum. In case it
flipped from false to true there, and the calculated sum is Inf,
memo.c might not be initialized at all. This is bad.
Found using memory sanitizer:
==55293==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x55dfb8d6c529 in rb_float_new_inline internal.h:1814:53
#1 0x55dfb8d1b30c in enum_sum enum.c:4017:18
#2 0x55dfb86d75ad in call_cfunc_m1 vm_insnhelper.c:2041:12
#3 0x55dfb864b141 in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11
#4 0x55dfb85e843d in vm_call_cfunc vm_insnhelper.c:2225:12
#5 0x55dfb85e08f3 in vm_call_method_each_type vm_insnhelper.c:2560:9
#6 0x55dfb85de9c7 in vm_call_method vm_insnhelper.c:2686:13
#7 0x55dfb849eac6 in vm_call_general vm_insnhelper.c:2730:12
#8 0x55dfb8686103 in vm_sendish vm_insnhelper.c:3623:11
#9 0x55dfb84dc29e in vm_exec_core insns.def:789:11