[Bug testsuite/126900] New: [17 Regression] FAIL: 23_containers/mdspan/layouts/padded_neg.cc -std=gnu++26 (test for errors, line 247)

"hjl.tools at gmail dot com via Gcc-bugs" <[email protected]>
Newsgroups gmane.comp.gcc.bugs
Message-ID <[email protected]/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126900

            Bug ID: 126900
           Summary: [17 Regression] FAIL:
                    23_containers/mdspan/layouts/padded_neg.cc
                    -std=gnu++26  (test for errors, line 247)
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

On Linux/x86-64 with

commit df494ca28d75f80b4d0b4e0b93b5d23d2092131a
Author: GCC Administrator <[email protected]>
Date:   Sat Aug 15 00:16:40 2026 +0000

    Daily bump.

$ make -k -j10 check RUNTESTFLAGS="--target_board='unix{-m32,}'"

gave me:

FAIL: 23_containers/mdspan/layouts/padded_neg.cc  -std=gnu++26  (test for
errors, line 247)
FAIL: 23_containers/mdspan/layouts/padded_neg.cc  -std=gnu++26  (test for
errors, line 248)
FAIL: 23_containers/mdspan/layouts/padded_neg.cc  -std=gnu++26  (test for
errors, line 298)
FAIL: 23_containers/mdspan/layouts/padded_neg.cc  -std=gnu++26  (test for
errors, line 302)
FAIL: 23_containers/mdspan/layouts/padded_neg.cc  -std=gnu++29  (test for
errors, line 247)
FAIL: 23_containers/mdspan/layouts/padded_neg.cc  -std=gnu++29  (test for
errors, line 248)
FAIL: 23_containers/mdspan/layouts/padded_neg.cc  -std=gnu++29  (test for
errors, line 298)
FAIL: 23_containers/mdspan/layouts/padded_neg.cc  -std=gnu++29  (test for
errors, line 302)
FAIL: 23_containers/mdspan/submdspan/canonical_slices_neg.cc  -std=gnu++26 
(test for errors, line 58)
FAIL: 23_containers/mdspan/submdspan/canonical_slices_neg.cc  -std=gnu++26 
(test for errors, line 61)
FAIL: 23_containers/mdspan/submdspan/canonical_slices_neg.cc  -std=gnu++26 
(test for errors, line 62)
FAIL: 23_containers/mdspan/submdspan/canonical_slices_neg.cc  -std=gnu++29 
(test for errors, line 58)
FAIL: 23_containers/mdspan/submdspan/canonical_slices_neg.cc  -std=gnu++29 
(test for errors, line 61)
FAIL: 23_containers/mdspan/submdspan/canonical_slices_neg.cc  -std=gnu++29 
(test for errors, line 62)
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