--dev builds a program whose call sites go through indirection cells so
something can attach and redefine through them. Nothing can attach to a
process this command builds, execs, waits for and deletes, so the flag had no
meaning here -- and an --x86 --dev route through run would have falsified
Build's own statement that flan dev never reaches that fork because --x86 is
read only by flan build. It falls into the refusal arm with a sentence
instead.
Joseph Ferano
96e5fab77f