Bug#904018: gcc-8: FTBFS on x32: hangs in the testsuite (zombie child)

[Laurence Parry <greenreaper@gmail.com>]

I think the problem may be that code to use libcurl is compiled into libphobos (std.net.curl) and tests for it are executed which do not correctly handle its absence.

Neither libgphobos-8-dev nor libgphobos76 appear to depend on, recommend or suggest libcurl4 and it does not appear in the build logs; 'curl' is suggested but not installed.

In the absence of correct libcurl libraries, these tests were known to time out:

https://issues.dlang.org/show_bug.cgi?id=18519

In doing so there might be a deadlock.

The issue was raised initially on FreeBSD and Windows, but Iain Buclaw

says there that it occurs on "Linux64 with MODEL=32"

(although this may be a lack of regular x86 32-bit libraries on a amd64 system).

This was meant to be fixed by a patch in March 2018, however it appears to have been ineffective:

https://github.com/dlang/phobos/commit/35e9807bbec392658ecdc8b4ed93d1f6c02f2845

Iain committed further patches to resolve this in January (now in dmd v2.085.1):

https://github.com/dlang/phobos/commit/1dcb92aade1c82c356e964c1ca15c51e7de8bf76

https://github.com/dlang/phobos/commit/d36b28c3fc90919a2a3a98249ad2d65393e28507

I'm not sure if this would go automatically into a 8.4, or maybe it can be cherry-picked?

I've no knowledge of D and other patches here (or elsewhere?) may also be relevant:

https://github.com/dlang/phobos/commit/c6bd6743254584e292f82cbcbac644d1705d14b0

https://github.com/dlang/phobos/commit/8d51519f3f11a5f9b538cd690521b61e9fbbf5df

https://github.com/dlang/phobos/commits/master/std/net/curl.d in general

Just noticed this failure popping up regularly in the x32 build logs and thought I'd have a look, since I'm hoping to build a home server on it shortly.

Best regards,

--

Laurence "GreenReaper" Parry
http://www.greenreaper.co.uk/