CFG.normalize(): Do not crash on completely overlapping nodes. (#1463)
CFG.normalize(): Do not crash on completely overlapping nodes. (#1463)

Overlapping nodes might happen due to bugs or errors in CFG recovery. One
such example can be found in Nucleo_read_hyperterminal-stripped.elf (with
force_complete_scan=True), caused by incorrectly performing ARM block
creation from 0x8002bb4 (that is, if we do not force the entire binary to
be lifted as THUMB mode). This commit prevents normalize() from crashing
on such overlapping nodes.
iamahuman/angr,angr/angr,angr/angr,iamahuman/angr,schieb/angr,schieb/angr,schieb/angr,angr/angr,iamahuman/angr