null ptr deref, segfault in Perl_pp_add pp_hot.c:597 #15577
./perl -e '$#b=()x0;0+splice@b'
==95532==ERROR: AddressSanitizer: SEGV on unknown address 0x00000000000c (pc 0x0000008af771 bp 0x0c32000012d2 sp 0x7fff14ca0410 T0)
AddressSanitizer can not provide additional info.
Program received signal SIGSEGV, Segmentation fault.
==20742== Invalid read of size 4
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