Model instantiation fails when flow latencies are assigned in properties #289

root@549e23822d46:~/opt/ocarina-build# ocarina --version
Ocarina v2017.1-510-gf2c500f (Working Copy from rf2c500fe)
Copyright (c) 2003-2009 Telecom ParisTech, 2010-2019 ESA & ISAE , 2019-2021 OpenAADL
Build date: Feb 22 2021 22:32:18

root@549e23822d46:~/opt/ocarina-build# uname -a
Linux 549e23822d46 5.4.0-60-generic #67~18.04.1-Ubuntu SMP Tue Jan 5 22:01:05 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

root@549e23822d46:~/opt/ocarina-build# gnatls -v
GNATLS 7.5.0
Copyright (C) 1997-2017, Free Software Foundation, Inc.
Source Search Path:
 <Current_Directory>
 /usr/lib/gcc/x86_64-linux-gnu/7/adainclude
Object Search Path:
 <Current_Directory>
 /usr/lib/gcc/x86_64-linux-gnu/7/adalib
Project Search Path:
 <Current_Directory>
 /usr/x86_64-linux-gnu/lib/gnat
 /usr/x86_64-linux-gnu/share/gpr
 /usr/share/gpr
 /usr/lib/gnat

root@549e23822d46:~/opt/ocarina-build# gcc --version
gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

TestLatency.aadl:48:13: latency cannot be properly instantiated

package TestLatency
public
 data d1
 end d1;
 -- deployment
 system deployment
 end deployment;
 system implementation deployment.impl
 subcomponents
 p1: process p1.impl;
 end deployment.impl;
 -- p1
 process p1
 end p1;
 process implementation p1.impl
 subcomponents
 t1: thread t1.impl;
 t2: thread t2.impl;
 connections
 conn: port t1.out_port -> t2.in_port;
 flows
 flow_t1_t2: end to end flow t1.flow_out_port -> conn -> t2.flow_in_port;
 properties
 latency => 2ms .. 4ms applies to flow_t1_t2;
 end p1.impl;
 -- t1
 thread t1
 features
 out_port: out data port d1;
 flows
 flow_out_port: flow source out_port;
 end t1;
 thread implementation t1.impl
 properties
 latency => 1ms .. 2ms applies to flow_out_port;
 end t1.impl;
 -- t2
 thread t2
 features
 in_port: in data port d1;
 flows
 flow_in_port: flow sink in_port;
 end t2;
 thread implementation t2.impl
 properties
 latency => 1ms .. 2ms applies to flow_in_port;
 end t2.impl;
end TestLatency;

ocarina -aadlv2 -r TestLatency::deployment.impl test_latency.aadl -i

TestLatency.aadl:48:13: latency cannot be properly instantiated
Cannot instantiate full model, exit now