[Bug libfortran/49791] [4.4/4.5/4.6/4.7 Regression] Formatted namelist reads fails with: Cannot match namelist object

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49791

--- Comment #5 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-07-20 17:24:47 UTC ---
(In reply to comment #4)
> The undocumented extension cannot be flagged by any combination of
> -Wall, -Wextra, -fcheck=all, -Wsurprising and/or -std=f95,f2003,f2008.

Different run-time behaviors can never be diagnosed at compile time. One could
argue whether libgfortran should behave differently, depending on flags (such
as -std=* or -f*), but that's something different. (And some flags *do* change
what libgfortran accepts)

> It's an undocumented bug^H^H^H extension.

I would love to have a complete documentation of the language including the
vendor extensions - as some major vendors have. However, unless someone
actually does, one has to live with an incomplete documentation. I think most
users prefer fixed bugs and new features to a better documentation.