Re: server.el test failures (was: Re: bug#9800: Incomplete truncated file buffers from the /proc filesystem)

[Paul Eggert <eggert@cs.ucla.edu>]

On 2023-02-23 16:50, Jim Porter wrote:
> On 2/23/2023 3:42 PM, Paul Eggert wrote:
>> I tried running it on Fedora 37 x86-64 on a slow machine (AMD Phenom 
>> II X4 910e) and reproduced the timing bug. The output of 'make check' 
>> contained:
>>
>>      GEN      lisp/server-tests.log
>>    Running 7 tests (2023-02-23 09:45:51-0800, selector `(not (or (tag 
>> :expensive-test) (tag :unstable) (tag :nativecomp)))')
>>    make[3]: *** [Makefile:174: lisp/server-tests.log] Error 157
>>
>> I guess "Error 157" means signal 29 (157 - 128), which is SIGIO on 
>> this platform.
>>
>> This was with Emacs master (commit 
>> 6411a9af03a4eb1a82db47a9642b11ba7edaaaf0).
> 
> Since the last message I posted, I'm now also seeing this test fail, 
> though I get a segfault instead. I bisected this to commit 
> a555abc56d5270cebe94f904189526d7ac433a94 ("Fix order of faces in 
> 'face-list'").

Although I see a patch has been installed for that segfault, I'm still 
seeing a server-tests.el failure of the original kind with SIGIO, this 
time on a faster (though by no means bleeding edge) machine (a Xeon 
W-1350) running Ubuntu 22.10 with current patches. This is with current 
master (commit 8797e514ab68c12ed05d3af88e6baba64bf08f4d).

The SIGIO symptom this time contains a few more details, perhaps because 
Ubuntu's shell is chattier than Fedora's:

/bin/bash: line 3: 2442869 I/O possible            HOME=/nonexistent 
LANG=C 
EMACS_TEST_DIRECTORY=/home/eggert/src/gnu/emacs/static-checking/test 
"../src/emacs" --module-assertions --no-init-file --no-site-file 
--no-site-lisp -L ":." -l ert -l lisp/server-tests --batch --eval 
'(ert-run-tests-batch-and-exit (quote (not (or (tag :expensive-test) 
(tag :unstable) (tag :nativecomp)))))' > lisp/server-tests.log 2>&1
Running 7 tests (2023-02-26 00:13:56-0800, selector ‘(not (or (tag 
:expensive-test) (tag :unstable) (tag :nativecomp)))’)
make[3]: *** [Makefile:174: lisp/server-tests.log] Error 157


I'm also getting a failure with mule-tests:

Test sgml-html-meta-no-post-less-than-10lines backtrace:
   signal(ert-test-failed (((should (eq 'utf-8 (sgml-html-meta-run (con
   ert-fail(((should (eq 'utf-8 (sgml-html-meta-run (concat "\n\n\n\n\n
   #f(compiled-function () #<bytecode -0x1e01a52764337803>)()
   ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test
   ert-run-test(#s(ert-test :name sgml-html-meta-no-post-less-than-10li
   ert-run-or-rerun-test(#s(ert--stats :selector (not ...) :tests [...
   ert-run-tests((not (or (tag :expensive-test) (tag :unstable) (tag :n
   ert-run-tests-batch((not (or (tag :expensive-test) (tag :unstable) (
   ert-run-tests-batch-and-exit((not (or (tag :expensive-test) (tag :un
   eval((ert-run-tests-batch-and-exit '(not (or (tag :expensive-test) (
   command-line-1(("-L" ":." "-l" "ert" "-l" "lisp/international/mule-t
   command-line()
   normal-top-level()
Test sgml-html-meta-no-post-less-than-10lines condition:
     (ert-test-failed
      ((should
        (eq 'utf-8
	    (sgml-html-meta-run ...)))
       :form
       (eq utf-8 utf-8-unix)
       :value nil))
    FAILED   7/13  sgml-html-meta-no-post-less-than-10lines (0.000100 
sec) at lisp/international/mule-tests.el:119
    passed   8/13  sgml-html-meta-no-pre (0.000154 sec)
    passed   9/13  sgml-html-meta-none (0.000086 sec)
Warning: unknown coding system "XXX"
    passed  10/13  sgml-html-meta-unknown-coding (0.000092 sec)
    passed  11/13  sgml-html-meta-utf-8 (0.000073 sec)
    passed  12/13  sgml-html-meta-utf-8-with-bom (0.000072 sec)
    passed  13/13  sgml-html-meta-windows-hebrew (0.000071 sec)

Ran 13 tests, 12 results as expected, 1 unexpected (2023-02-26 
00:13:53-0800, 0.073256 sec)

1 unexpected results:
    FAILED  sgml-html-meta-no-post-less-than-10lines

make[3]: *** [Makefile:174: lisp/international/mule-tests.log] Error 1