[Bug testsuite/99731] New: g++.dg/modules/alias-1_a.H: error: failed to read compiled module: No such file or directory

[Bug testsuite/99731] New: g++.dg/modules/alias-1_a.H: error: failed to read compiled module: No such file or directory

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99731

            Bug ID: 99731
           Summary: g++.dg/modules/alias-1_a.H: error: failed to read
                    compiled module: No such file or directory
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: nathan at acm dot org
  Target Milestone: ---

On x86-64 machine with 112 processors,

$ make -j 56 check RUNTESTFLAGS="--target_board='unix{-m32,}'"

leads to

In module imported at
/export/gnu/import/git/gitlab/x86-gcc/gcc/testsuite/g++.dg/modules/alias-1_b.C:5:1:
/export/ssd/git/gitlab/x86-gcc/gcc/testsuite/g++.dg/modules/alias-1_a.H: error:
failed to read compiled module: No such file or directory
/export/ssd/git/gitlab/x86-gcc/gcc/testsuite/g++.dg/modules/alias-1_a.H: note:
compiled module file is
'gcm.cache/./export/ssd/git/gitlab/x86-gcc/gcc/testsuite/g++.dg/modules/alias-1_a.H.gcm'
/export/ssd/git/gitlab/x86-gcc/gcc/testsuite/g++.dg/modules/alias-1_a.H: note:
imports must be built before being imported
/export/ssd/git/gitlab/x86-gcc/gcc/testsuite/g++.dg/modules/alias-1_a.H: fatal
error: returning to the gate for a mechanical issue
compilation terminated.
compiler exited with status 1
FAIL: g++.dg/modules/alias-1_b.C -std=c++17 (test for excess errors)
Excess errors:
/export/ssd/git/gitlab/x86-gcc/gcc/testsuite/g++.dg/modules/alias-1_a.H: error:
failed to read compiled module: No such file or directory
/export/ssd/git/gitlab/x86-gcc/gcc/testsuite/g++.dg/modules/alias-1_a.H: fatal
error: returning to the gate for a mechanical issue
compilation terminated.

FAIL: g++.dg/modules/dir-only-2_b.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/dir-only-2_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/dir-only-2_b.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/cpp-6_c.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/cpp-6_c.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/cpp-6_c.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/alias-1_b.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/alias-1_b.C -std=c++17  scan-lang-dump-times module "CMI
is " 1
FAIL: g++.dg/modules/alias-1_d.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/alias-1_d.C module-cmi kevin (gcm.cache/kevin.gcm)
FAIL: g++.dg/modules/alias-1_e.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/alias-1_f.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/alias-1_b.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/alias-1_b.C -std=c++2a  scan-lang-dump-times module "CMI
is " 1
FAIL: g++.dg/modules/alias-1_d.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/alias-1_d.C module-cmi kevin (gcm.cache/kevin.gcm)
FAIL: g++.dg/modules/alias-1_e.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/alias-1_f.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/alias-1_b.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/alias-1_b.C -std=c++2b  scan-lang-dump-times module "CMI
is " 1
FAIL: g++.dg/modules/alias-1_d.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/alias-1_d.C module-cmi kevin (gcm.cache/kevin.gcm)
FAIL: g++.dg/modules/alias-1_e.C -std=c++2b (test for excess errors)
FAIL: g++.dg/modules/alias-1_f.C -std=c++2b (test for excess errors)

[Bug testsuite/99731] g++.dg/modules/alias-1_a.H: error: failed to read compiled module: No such file or directory

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99731

Nathan Sidwell <nathan at gcc dot gnu.org> changed:

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

--- Comment #1 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
How repeatable is this?

[Bug testsuite/99731] g++.dg/modules/alias-1_a.H: error: failed to read compiled module: No such file or directory

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99731

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-03-23
             Status|UNCONFIRMED                 |NEW

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Nathan Sidwell from comment #1)
> How repeatable is this?

Close to 100%.

[Bug testsuite/99731] g++.dg/modules/alias-1_a.H: error: failed to read compiled module: No such file or directory

[vvinayag at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99731

vvinayag at arm dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vvinayag at arm dot com

--- Comment #3 from vvinayag at arm dot com ---
(In reply to H.J. Lu from comment #2)
> (In reply to Nathan Sidwell from comment #1)
> > How repeatable is this?
> 
> Close to 100%.

Is there an update on these failures?
I have also seen these failures and have not understood the cause.