That's true that it works fine in jammy, but the breakage does still
occur sometimes on focal. In case others run across this issue on
focal, probably worth keeping this bug report open for reference.
** Also affects: libsoup2.4 (Ubuntu Focal)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1945713
Title:
Flaky test brotli/basic on focal amd64?
Status in libsoup2.4 package in Ubuntu:
Fix Released
Status in libsoup2.4 source package in Focal:
New
Bug description:
The brotli/basic test case periodically fails. It appears that a few
retriggers can result in a pass:
https://autopkgtest.ubuntu.com/packages/libs/libsoup2.4/focal/amd64
The failures look like this in autopkgtest logs:
ERROR:../tests/brotli-decompressor-test.c:59:test_brotli:
assertion failed ((char*)out_bytes->data == contents): ("***\nU" ==
"***\n")
I've replaced most of the text with '***' to highlight the difference
is a 'U' character appended.
The test case is essentially doing a decompression of 'brotli-
data/compressed.br' and comparing that it matches 'brotli-
data/uncompressed.txt'. I've done this manually using the brotli cli,
and the files do indeed have the same content. I've also built the
package and run the test case locally in a focal lxc container on
amd64:
$ cd
libsoup2.4-gu/debian/libsoup2.4-tests/usr/libexec/installed-tests/libsoup-2.4
$ while : ; do ./brotli-decompressor-test | grep 'brotli/basic'; sleep
0.1; done
I left that to run several hundred cycles but no failures reported at
all.
There are a bunch of instances of this failure, here's a few for
reference:
https://autopkgtest.ubuntu.com/results/autopkgtest-focal/focal/amd64/libs/libsoup2.4/20210602_152107_d1d56@/log.gz
https://autopkgtest.ubuntu.com/results/autopkgtest-focal/focal/amd64/libs/libsoup2.4/20210531_201241_8b1be@/log.gz
https://autopkgtest.ubuntu.com/results/autopkgtest-focal/focal/amd64/libs/libsoup2.4/20200508_211619_2aec8@/log.gz
That last link is the earliest instance I've been able to find.
You'll notice in the second two links they also have a failure "not ok
2 /ssl/tls-interaction", but the first link shows only the brotli
failure.
Interestingly, I've not found instances of this failure against other
architectures than amd64, nor have I seen it on releases other than
focal. No dice from googling for bug reports or other reports of test
failures with libsoup2.4 + brotli.
The test's code is doing this, basically:
SoupBrotliDecompressor *dec = soup_brotli_decompressor_new ();
do {
result = g_converter_convert (G_CONVERTER (dec), in_buf,
length, out_buf, sizeof out_buf, 0,
&bytes_read, &bytes_written,
&error);
g_byte_array_append (out_bytes, out_buf, bytes_written);
in_buf += bytes_read;
length -= bytes_read;
} while (result == G_CONVERTER_CONVERTED);
soup_brotli_decompressor's code is here:
https://gitlab.gnome.org/GNOME/libsoup/-/blob/master/libsoup/content-
decoder/soup-brotli-decompressor.c
But I'm not spotting anything that would obviously cause a 'U' to be
randomly appended sometimes. And why 'U'? UINT? Unknown? User error?
There are some interesting bug reports in GNOME about brotli in
libsoup's bug tracker (e.g. #106, #146, #119, and #193), but none that
match this.
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