p4c-bm2-ss should gracifully exit when compiling a program without main (#691)
p4c-bm2-ss should gracifully exit when compiling a program without main (#691)


p4lang/p4c,mbudiu-vmw/p4c-clone,hanw/p4c,mbudiu-vmw/p4c-clone,hanw/p4c,p4lang/p4c,hanw/p4c,mbudiu-vmw/p4c-clone,mbudiu-vmw/p4c-clone,hanw/p4c,p4lang/p4c,p4lang/p4c,p4lang/p4c