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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/100577] [11/12 Regression] Unhelpful diagnostics for
 ill-formed call to partially applied range adaptor object
Date: Thu, 13 May 2021 03:12:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100577

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |ppalka at gcc dot g=
nu.org
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-05-13

--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Created attachment 50804
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D50804&action=3Dedit
wip library-side patch

The attached WIP patch implements the library-side workaround mentioned in
comment #2.  With it, we recover the same diagnostics that GCC 10 gave us,
though we need to pass -fconcepts-diagnostics-depth=3D3 to see them.=