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From: russ lyttle <lyttlec@removegmail.com>
Newsgroups: comp.lang.ada
Subject: Gnat Problem - Freezing too soon
Date: Thu, 28 Feb 2019 13:34:44 -0500
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Date: 2019-02-28T13:34:44-05:00
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Example from the bookAnalysable Real-Time Systems :

1  package Environment_Monitor.Ch4_Status is --Protected
2    protected type Methane_Agent (Ceiling : Priority)
3     with Priority => Ceiling
4       is new CH4_Safety
5    with
6      overriding function Check_Safe return Methane_Status;
7      overriding procedure Set_Safety (M : Methane_Status);
8    private
9       Current_Status : Methane_Status := Motor_Unsafe;
10   end Methane_Agent;
11 end Environment_Monitor.Ch4_Status;

Gnat complains that Methane_Agent is frozen at line 2, and line 3 is 
trying to change an attribute after being frozen.

I've found some discussion about gnat freezing things too soon. Is there 
an accepted work-around for the general problem until this issue is 
resolved?

Thanks.