7125879: assert(proj != NULL) failed: must be found
Summary: Leave i_o attached to slow allocation call when there are no i_o users after the call.
Reviewed-by: iveresov, twisti
7123954: Some CTW test crash with SIGSEGV
Summary: Correct Allocate expansion code to preserve i_o when only slow call is generated.
Reviewed-by: iveresov