Instrumentation for delayed UB stemming from uninitialized memory #7479

Job	Run time
benchcomp-tests	4m 57s
documentation	2m 0s
write-json-symtab-regression	17m 13s
regression (macos-13)	30m 28s
regression (ubuntu-20.04)	25m 56s
regression (ubuntu-22.04)	27m 50s
perf	35m 15s
regression (macos-14)	21m 5s
	2h 44m 44s

Provide feedback