[Bug c++/101853] New: [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[Bug c++/101853] New: [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

            Bug ID: 101853
           Summary: [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hp at gcc dot gnu.org
                CC: nathan at acm dot org, redi at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux
            Target: cris-elf

With c8b024fa4b76bfd914e96dd3cecfbb6ee8e91316 (r12-2773)
the g++.dg/modules/xtreme-header-5_b.C test started to fail with an ICE for
cris-elf:

Running /X/gcc/testsuite/g++.dg/modules/modules.exp ...
...
FAIL: g++.dg/modules/xtreme-header-5_b.C -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-5_b.C -std=c++2a (test for excess errors)
...
with the following in g++.log (edited for brevity)

spawn -ignore SIGHUP /X/gccobj/gcc/testsuite/g++/../../xg++
-B/X/gccobj/gcc/testsuite/g++/../../
/X/gcc/gcc/testsuite/g++.dg/modules/xtreme-header-5_b.C
-fdiagnostics-plain-output -nostdinc++
-I/X/gccobj/cris-elf/libstdc++-v3/include/cris-elf
-I/X/gccobj/cris-elf/libstdc++-v3/include -I/X/gcc/libstdc++-v3/libsupc++
-I/X/gcc/libstdc++-v3/include/backward -I/X/gcc/libstdc++-v3/testsuite/util
-fmessage-length=0 -std=c++2a -pedantic-errors -Wno-long-long -fmodules-ts
-fno-module-lazy -S -isystem /X/gccobj/cris-elf/./newlib/targ-include -isystem
/X/gcc/newlib/libc/include -o xtreme-header-5_b.s
/X/gcc/gcc/testsuite/g++.dg/modules/xtreme-header-5_b.C:4:30: internal compiler
error: in add_mergeable_specialization, at cp/pt.c:30073
0x883218 add_mergeable_specialization(bool, bool, spec_entry*, tree_node*,
unsigned int)
        /X/gcc/gcc/cp/pt.c:30073
0x7dc4f7 trees_in::decl_value()
        /X/gcc/gcc/cp/module.cc:8081
0x7dd864 trees_in::tree_node(bool)
        /X/gcc/gcc/cp/module.cc:9161
0x7e5f7b module_state::read_cluster(unsigned int)
        /X/gcc/gcc/cp/module.cc:14819
0x7e633d module_state::load_section(unsigned int, binding_slot*)
        /X/gcc/gcc/cp/module.cc:18090
0x7e7646 module_state::read_language(bool)
        /X/gcc/gcc/cp/module.cc:18019
0x7e7864 direct_import
        /X/gcc/gcc/cp/module.cc:18885
0x8603b8 cp_parser_translation_unit
        /X/gcc/gcc/cp/parser.c:4925
0x8603b8 c_parse_file()
        /X/gcc/gcc/cp/parser.c:46181
0x9da2a1 c_common_parse_file()
        /X/gcc/gcc/c-family/c-opts.c:1223
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
compiler exited with status 1

I don't see this for other targets on gcc-testresults@ (unless you count
i586-unknown-freebsd11.4 /
https://gcc.gnu.org/pipermail/gcc-testresults/2021-August/712406.html where
about all modules test fail with ICE). Also, it looks like -save-temps doesn't
help here, so please instruct on how to help me help you with the equivalent
information.

It's unlikely that r12-2773 is the cause rather than exposing the bug, being a
libstdc++ commit. Looking at the code cp/pt.c:30073, where there's a gcc_assert
on an expected empty hash-slot IIUC, makes me think this something like hashing
on uninitialized data or a plain bad hash).

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Isn't it ice-on-valid-code?

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|ice-on-invalid-code         |ice-on-valid-code

--- Comment #2 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> Isn't it ice-on-valid-code?

Oops, fixed, thanks.

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |12.0

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

seurer at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |seurer at gcc dot gnu.org

--- Comment #3 from seurer at gcc dot gnu.org ---
I am seeing something possibly related with xtreme-header-6.C and
xtreme-tr1_b.C

spawn -ignore SIGHUP
/home/seurer/gcc/git/build/gcc-trunk-bootstrap/gcc/testsuite/g++19/../../xg++
-B/home/seurer/gcc/git/build/gcc-trunk-bootstrap/gcc/testsuite/g++19/../../
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/testsuite/g++.dg/modules/xtreme-header-6_b.C
-fdiagnostics-plain-output -nostdinc++
-I/home/seurer/gcc/git/build/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/git/build/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libstdc++-v3/libsupc++
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libstdc++-v3/include/backward
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libstdc++-v3/testsuite/util
-fmessage-length=0 -std=c++2a -pedantic-errors -Wno-long-long -fmodules-ts
-fno-module-lazy -S -o xtreme-header-6_b.s^M
hash table checking failed: equal operator returns true for a pair of values
with a different hash value^M
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/testsuite/g++.dg/modules/xtreme-header-6_b.C:4:30:
internal compiler error: in hashtab_chk_error, at hash-table.c:137^M
0x10270667 hashtab_chk_error()^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/hash-table.c:137^M
0x10634607 hash_table<spec_hasher, false, xcallocator>::verify(spec_entry*
const&, unsigned int)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/hash-table.h:1033^M
0x10634d5f hash_table<spec_hasher, false,
xcallocator>::find_slot_with_hash(spec_entry* const&, unsigned int,
insert_option)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/hash-table.h:968^M
0x105b40ff match_mergeable_specialization(bool, spec_entry*)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/pt.c:30000^M
0x104be1bf trees_in::key_mergeable(int, merge_kind, tree_node*, tree_node*,
tree_node*, tree_node*, bool)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:10678^M
0x104c512b trees_in::decl_value()^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:7911^M
0x104b7d27 trees_in::tree_node(bool)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:9161^M
0x104b81ab trees_in::tree_node(bool)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:9211^M
0x104b87a3 trees_in::tree_node(bool)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:9354^M
0x104bad9f trees_in::core_vals(tree_node*)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:6545^M
0x104c520b trees_in::tree_node_vals(tree_node*)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:7069^M
0x104c520b trees_in::decl_value()^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:7950^M
0x104b7d27 trees_in::tree_node(bool)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:9161^M
0x104c3c6b module_state::read_cluster(unsigned int)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:14819^M
0x104c4583 module_state::load_section(unsigned int, binding_slot*)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:18090^M
0x104c7eeb module_state::read_language(bool)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:18019^M
0x104c8283 direct_import^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/module.cc:18885^M
0x1054ab33 cp_parser_import_declaration^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/parser.c:14486^M
0x1057eed7 cp_parser_translation_unit^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/parser.c:4943^M
0x1057eed7 c_parse_file()^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/parser.c:46558^M
Please submit a full bug report,^M
with preprocessed source if appropriate.^M
Please include the complete backtrace with any bug report.^M
See <https://gcc.gnu.org/bugs/> for instructions.^M
compiler exited with status 1
FAIL: g++.dg/modules/xtreme-header-6_b.C -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-6_b.C -std=c++2a (test for excess errors)
Excess errors:
hash table checking failed: equal operator returns true for a pair of values
with a different hash value

spawn -ignore SIGHUP
/home3/seurer/gcc/git/build/gcc-trunk-bootstrap/gcc/testsuite/g++12/../../xg++
-B/home3/seurer/gcc/git/build/gcc-trunk-bootstrap/gcc/testsuite/g++12/../../
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/testsuite/g++.dg/modules/xtreme-tr1_b.C
-fdiagnostics-plain-output -nostdinc++
-I/home/seurer/gcc/git/build/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/git/build/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libstdc++-v3/libsupc++
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libstdc++-v3/include/backward
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libstdc++-v3/testsuite/util
-fmessage-length=0 -std=c++2b -pedantic-errors -Wno-long-long -fmodules-ts
-fno-module-lazy -S -o xtreme-tr1_b.s^M
hash table checking failed: equal operator returns true for a pair of values
with a different hash value^M
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/testsuite/g++.dg/modules/xtreme-tr1_b.C:4:25:
internal compiler error: in hashtab_chk_error, at hash-table.c:137^M
0x102705cf hashtab_chk_error()^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/hash-table.c:137^M
0x1062f14f hash_table<spec_hasher, false, xcallocator>::verify(spec_entry*
const&, unsigned int)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/hash-table.h:1033^M
0x1062f89f hash_table<spec_hasher, false,
xcallocator>::find_slot_with_hash(spec_entry* const&, unsigned int,
insert_option)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/hash-table.h:968^M
0x105af38f match_mergeable_specialization(bool, spec_entry*)^M
        /home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/cp/pt.c:30000^M
...etc...

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #4 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
This particular ICE/test-failure disappeared (unlikely: was fixed) with a
commit in the series (last known failing as described..first subsequently known
passing) cba64d855df5..ee8f9ff00d79.

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #5 from seurer at gcc dot gnu.org ---
I am still seeing these today with g:a40970cf043553f0ca09a3b7be1c5a949623d915,
r12-4318

FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++17 (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++17 (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++2b (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++2b (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_a.H -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-3_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-3_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-3_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-3_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-3_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-3_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-3_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-3_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-3_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-3_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-3_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-3_b.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_b.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_b.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_b.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_c.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_c.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_c.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_c.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_c.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-3_c.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-4_b.C -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-4_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_a.H -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-5_a.H -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-5_a.H -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_a.H -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_a.H -std=c++2b (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-5_a.H -std=c++2b (internal compiler error)
FAIL: g++.dg/modules/xtreme-header-5_a.H -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_a.H -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-5_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-5_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-5_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-5_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-5_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-5_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header-5_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header-5_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_b.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_b.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_c.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_c.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_c.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header-5_c.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++17 (internal compiler error)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++17 (internal compiler error)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++2a (internal compiler error)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++2b (internal compiler error)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++2b (internal compiler error)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_a.H -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header_a.H module-cmi 
(gcm.cache/$srcdir/g++.dg/modules/xtreme-header_a.H.gcm)
FAIL: g++.dg/modules/xtreme-header_b.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_b.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_b.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/xtreme-header_b.C -std=c++2b (test for excess errors)

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #6 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(In reply to seurer from comment #5)
> I am still seeing these today with
> g:a40970cf043553f0ca09a3b7be1c5a949623d915, r12-4318

[list elided]

For cris-elf too.  For cris-elf, be5bdccd865b (r12-4056) was clean, but on the
next run of my autotester, with 5f9ccf17de7f (r12-4088), these appeared:
+g++.sum g++.dg/modules/xtreme-header-3_a.H
+g++.sum g++.dg/modules/xtreme-header-3_b.C
+g++.sum g++.dg/modules/xtreme-header-3_c.C
+g++.sum g++.dg/modules/xtreme-header_a.H
+g++.sum g++.dg/modules/xtreme-header_b.C

Then no change in the results for these tests until and including db3d7270b42f
(r12-4245).
At the next run, with e6f6972b5f47 (r12-4255), these were added:
+g++.sum g++.dg/modules/xtreme-header-5_a.H
+g++.sum g++.dg/modules/xtreme-header-5_b.C
+g++.sum g++.dg/modules/xtreme-header-5_c.C

Then similarly no change until and including 008e7397dad9 (r12-4324).
At the next run, with 30cce6f65a77 (r12-4331), this was added:
+g++.sum g++.dg/modules/xtreme-tr1_b.C

Then similarly no change until and including d1dcaa31453f (r12-4351).
At the next run, with b37351e3279d (r12-4359), that one disappeared again:
-g++.sum g++.dg/modules/xtreme-tr1_b.C

Then no change matching "g++.dg/modules/xtreme-" up to and including
a29174904bb1 (r12-5240), which is the last run at this writing.

I'm going to see about xfailing these, as apparently no-one takes pity beyond
documenting them.  My own excuse is that C++ modules isn't really a priority
for cris-elf.

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Nobody is maintaining the modules code right now. This was introduced by a
libstdc++ change, but as far as I know the library code is correct and this is
just a compiler bug that should get fixed in stage 3.

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #8 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(In reply to Hans-Peter Nilsson from comment #6)

> Then no change matching "g++.dg/modules/xtreme-" up to and including
> a29174904bb1 (r12-5240), which is the last run at this writing.

Update:
At 6ea5fb3cc7f3 (r12-5529) results for the xtreme-header tests were still the
same.
At 90cb088ece8d (r12-5536), there was a new regression; another instance of an
ICE in add_mergeable_specialization:
+g++.sum g++.dg/modules/xtreme-header-2_b.C

Then as above, no change up to and including 665f726b8a15 (r12-5545).

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-11-27

--- Comment #9 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(In reply to Hans-Peter Nilsson from comment #8)
> Then as above, no change up to and including 665f726b8a15 (r12-5545).

Still there at caa04517e6f7 (r12-5549), then at f4ed2e3ae7d9 (r12-5555), the
g++.dg/modules/xtreme-header-2_b.C regression is gone again.

(I see this was still UNCONFIRMED, now changed to NEW.)

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4

[Bug c++/101853] [12 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[guojiufu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

Jiu Fu Guo <guojiufu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |guojiufu at gcc dot gnu.org

--- Comment #10 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
On the trunk, this would be fixed:
./gcc/testsuite/g++/g++.sum:PASS: g++.dg/modules/xtreme-header-5_b.C -std=c++17
(test for excess errors)
./gcc/testsuite/g++/g++.sum:PASS: g++.dg/modules/xtreme-header-5_b.C -std=c++2a
(test for excess errors)
./gcc/testsuite/g++/g++.sum:PASS: g++.dg/modules/xtreme-header-5_b.C -std=c++2b
(test for excess errors)
./gcc/testsuite/g++/g++.log:PASS: g++.dg/modules/xtreme-header-5_b.C -std=c++17
(test for excess errors)
./gcc/testsuite/g++/g++.log:PASS: g++.dg/modules/xtreme-header-5_b.C -std=c++2a
(test for excess errors)
./gcc/testsuite/g++/g++.log:PASS: g++.dg/modules/xtreme-header-5_b.C -std=c++2b
(test for excess errors)

> grep -r xtreme-. > ~/22.4.1aaf3a5993ae.log
grep -i FAIL ~/22.4.1aaf3a5993ae.log |wc
      0       0       0
grep -i PASS ~/22.4.1aaf3a5993ae.log |wc
    360    2232   41904

[Bug c++/101853] [12/13 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|12.0                        |12.2

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 12.1 is being released, retargeting bugs to GCC 12.2.

[Bug c++/101853] [12/13/14 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|12.3                        |12.4

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 12.3 is being released, retargeting bugs to GCC 12.4.

[Bug c++/101853] [12/13/14 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[guojiufu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #14 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
Pass on trunk, gcc-12, gcc-11 for xtreme-header-* cases:

make check-gcc-c++ RUNTESTFLAGS="--target_board=unix'{-m64}'
modules.exp=xtreme-header-*" 
                === g++ Summary ===

# of expected passes            72

[Bug c++/101853] [12/13/14 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #15 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Fixed for cris-elf after r12-6062-gba64166bf81b6e but before-and-inclusive
r12-6066-g6bcb6ed5a44b6f.

[Bug c++/101853] [12/13/14 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #16 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(In reply to Hans-Peter Nilsson from comment #15)
> Fixed for cris-elf after r12-6062-gba64166bf81b6e but before-and-inclusive
> r12-6066-g6bcb6ed5a44b6f.
That was just counting g++.dg/modules/xtreme-header-5_* failures.

But "nobody" counts that close, so better say "no xtreme-header-* failures
since r13-5702-g72058eea9d407e".

[Bug c++/101853] [12/13/14 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[guojiufu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #17 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
> But "nobody" counts that close, so better say "no xtreme-header-* failures
> since r13-5702-g72058eea9d407e".

:) Since these failures occur erratically, so maybe reopen this or open a new
one if the failures are reproduced. 

As two xtreme-header-5_ failures (not ICE) occur in Results for 14.0.0
20230518: https://gcc.gnu.org/pipermail/gcc-testresults/2023-May/784674.html.

[Bug c++/101853] [12/13/14 Regression] g++.dg/modules/xtreme-header-5_b.C ICE

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101853

--- Comment #18 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(In reply to Jiu Fu Guo from comment #17)
> > But "nobody" counts that close, so better say "no xtreme-header-* failures
> > since r13-5702-g72058eea9d407e".
> 
> :) Since these failures occur erratically,

They did at the time for cris-elf (too), but I believe the cause of *those*
failures has been fixed.

> so maybe reopen this or open a
> new one if the failures are reproduced.

That's the idea. :)

> As two xtreme-header-5_ failures (not ICE) occur in Results for 14.0.0
> 20230518: https://gcc.gnu.org/pipermail/gcc-testresults/2023-May/784674.html.

Good to know, but not for cris-elf.