[Patch, Fortran] PR fortran/35837: Fix type-resolving and gfc_current_ns

[Daniel Kraft]

Daniel Kraft wrote:
> Hi,
> 
> resolve_types used to set gfc_current_ns to the namespace resolved, but 
> did not reset the value on exit; for nested namespaces and the test in 
> PR 35837, this lead to the result that gfc_save_all/gfc_add_save was 
> called for the module's namespace, while gfc_current_ns still pointed to 
> the (resolved from module's resolve_types prior to the save_all call?) 
> pure procedure's namespace and thus the compiler complained about the 
> SAVE for a pure procedure.
> 
> This patch fixes this problem by remembering the old namespace and 
> resetting it on exit for resolve_types.  I believe this is generally a 
> good idea, though, and just happens to fix this PR.
> 
> Currently regression testing on GNU/Linux-x86-32, and I hope there won't 
> be any despite this might have some consequences; but I hope all are 
> positive :)  Ok to commit if no regressions?

No regressions.

> Daniel
> 
> PS: The gfc_save_all change remained from some experiments there; I can 
> take it out if you prefer.  Should I add a ChangeLog entry like "removed 
> blank line"?
> 


-- 
Done:     Arc-Bar-Cav-Sam-Val-Wiz, Dwa-Elf-Gno-Hum-Orc, Law-Neu-Cha, Fem-Mal
To go:    Hea-Kni-Mon-Pri-Ran-Rog-Tou