4247235: (spec str) StringBuffer.insert(int, char[]) specification is inconsistent
Summary: Add blanket null-handling statement to StringBuilder and StringBuffer
Reviewed-by: mduigou
os_family = linux
arch = x86
arch_model = x86_64
os_arch = linux_x86
os_arch_model = linux_x86_64
lib_arch = amd64
compiler = gcc
sysdefs = -DLINUX -D_GNU_SOURCE -DAMD64