bug#69953: [PATCH] Remove duplicated asserts and checks

[Eli Zaretskii]

Ping! Ping!  Philipp and Daniel, any comments?

> Cc: serg.foo@gmail.com, 69953@debbugs.gnu.org
> Date: Sat, 13 Apr 2024 10:42:50 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> Ping! Philipp and Daniel, do you have any comments on this?
> 
> > Cc: Philipp Stephani <phst@google.com>, 69953@debbugs.gnu.org,
> >  Daniel Colascione <dancol@dancol.org>
> > Date: Sat, 23 Mar 2024 09:15:04 +0200
> > From: Eli Zaretskii <eliz@gnu.org>
> > 
> > > Date: Sat, 23 Mar 2024 03:27:34 +0000
> > > From: Sergey Vinokurov <serg.foo@gmail.com>
> > > 
> > > I noticed that emacs-module.c contains duplicate 
> > > module_non_local_exit_check() checks and 
> > > module_assert_thread/module_assert_env asserts, mostly performed at the 
> > > same point in program sequentially.
> > > 
> > > The module_non_local_exit_check() checks happen in 
> > > MODULE_HANDLE_NONLOCAL_EXIT and MODULE_FUNCTION_BEGIN_NO_CATCH macros. 
> > > The MODULE_HANDLE_NONLOCAL_EXIT is never used by itself, only as part of 
> > > MODULE_FUNCTION_BEGIN which starts with MODULE_FUNCTION_BEGIN_NO_CATCH 
> > > that performs the check.
> > > 
> > > In addition, there're 6 "Implementation of runtime and environment 
> > > functions" rules outlined where MODULE_HANDLE_NONLOCAL_EXIT should be 
> > > called at step 4 but module_non_local_exit_check() is supposed to have 
> > > already happened at step 3 so documentation does not seem to intend for 
> > > the check to be repeated in MODULE_HANDLE_NONLOCAL_EXIT.
> > > 
> > > Regarding asserts my observation is that module_non_local_exit_check() 
> > > already contains module_assert_thread and module_assert_env so there's 
> > > no need to do asserts if first thing we do is call 
> > > module_non_local_exit_check.
> > 
> > Thanks, but why is that a problem?  module_assertions is false by
> > default, and the function to turn on module assertions is not even
> > documented in the ELisp manual.  IOW, this is a debugging aid which
> > will rarely if at all activated, and if it is, that's on purpose by
> > the programmer who is investigating some tricky problem.  Why is it a
> > problem to have too many assertions, which might help that programmer
> > find a bug?
> > 
> > I added Daniel and Philipp to the discussion, in case they have
> > comments to this proposal.
> > 
> > 
> > 
> > 
> 
> 
> 
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