[Bug ada/67205] violation of No_Implicit_Dynamic_Code restriction not reported

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67205

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Unnecessary trampolines for |violation of
                   |nested packages             |No_Implicit_Dynamic_Code
                   |                            |restriction not reported

--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The attached example requires generation of trampolines.  This may be due to
> bug 57999, but I think a front-end fix would be more reliable.

Please clarify "front-end fix".  The language requires pointers to nested
functions in this case and you cannot reasonably change that, nested functions
being first-class citizens in Ada.

More generally, trampolines can indeed be eliminated, but you need changes in
the entire compiler to do it.

> As an additional surprise, pragma Restrictions (No_Implicit_Dynamic_Code)
> does not cause compilation to fail.  The error is only detected at binding
> time, and -Wtrampolines is needed to find the culprit.

Yes, the violation is detected but the error is not issued, probably because
it's the instantiation of a run-time unit.