On Sun, Jan 07, 2018 at 04:23:31PM -0500, Mark H Weaver wrote:
> I recently wrote on guix-devel:
> 
> > I just followed this up with a Spectre mitigation for WebKitGTK+
> > backported from upstream WebKit:
> >
> >   https://git.savannah.gnu.org/cgit/guix.git/commit/?id=56804398a94bea941183ae4ed29d2a9f82069a6f
> 
> Unfortunately, this seems to have introduced non-deterministic build
> failures on Hydra.  On the first attempt, WebKitGTK+ failed to build on
> both x86_64 and i686.  On the second attempt, it succeeded on x86_64 but
> failed again on i686.  Hydra is currently working on the third build
> attempt on i686.
> 
> I find it very unlikely that this problem is related to the content of
> the patch itself.  My best guess is that it's caused by the fact that
> our 'patch-and-repack' mechanism, which generates the patched tarball,
> resets all the timestamps to 0, whereas previously we built the upstream
> tarball directly with non-zero timestamps.
> 
> I guess that the build system contains a race condition that is much
> more likely to occur when the timestamps are 0.  It did happen once in
> December 2015 on i686, but the other three failures happened today.
> 
> I suppose the issue could be solved by disabling parallelism in the
> build, but that would be a shame given that WebKitGTK+ already takes a
> very long time to build: almost 5 hours on my X200 and about 2 hours on
> hydra.gnunet.org.
> 
> It's also inconvenient that the build log is so large (around 70 MB)
> that Hydra's web interface refuses to display it.
> 
> The failure is always the same:
> 
> --8<---------------cut here---------------start------------->8---
> Traceback (most recent call last):
>   File "/tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py", line 28, in <module>
>     import webkit.messages
> EOFError: EOF read where object expected
> --8<---------------cut here---------------end--------------->8---
> 
> although the specific target being built when this error occurs varies.
> The targets that I've seen fail are:
> 
> 1. make[2]: *** [Source/WebKit/CMakeFiles/WebKit2.dir/build.make:745: DerivedSources/WebKit2/WebRTCSocketMessageReceiver.cpp] Error 1
> 2. make[2]: *** [Source/WebKit/CMakeFiles/WebKit2.dir/build.make:722: DerivedSources/WebKit2/WebRTCMonitorMessageReceiver.cpp] Error 1
> 3. make[2]: *** [Source/WebKit/CMakeFiles/WebKit2.dir/build.make:457: DerivedSources/WebKit2/WebFullScreenManagerProxyMessageReceiver.cpp] Error 1
> 4. GNUmakefile:82826: recipe for target 'DerivedSources/WebKit2/CustomProtocolManagerProxyMessages.h' failed
> 
> That last one (4) occurred with webkitgtk-2.4.9 on i686-linux in
> December 2015.
> 
> Here's a longer tail of the failed build log from today on x86_64:
> 
> --8<---------------cut here---------------start------------->8---
> [ 83%] Generating ../../DerivedSources/WebKit2/WebResourceLoadStatisticsStoreMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebResourceLoadStatisticsStoreMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/WebResourceLoadStatisticsStore.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebResourceLoadStatisticsStoreMessageReceiver.cpp
> [ 83%] Generating ../../DerivedSources/WebKit2/WebAutomationSessionMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebAutomationSessionMessages.h
> [ 83%] Generating ../../DerivedSources/WebKit2/DownloadProxyMessageReceiver.cpp, ../../DerivedSources/WebKit2/DownloadProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/WebResourceLoadStatisticsStore.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebResourceLoadStatisticsStoreMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/Automation/WebAutomationSession.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebAutomationSessionMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/Downloads/DownloadProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/DownloadProxyMessageReceiver.cpp
> [ 83%] Generating ../../DerivedSources/WebKit2/NetworkProcessProxyMessageReceiver.cpp, ../../DerivedSources/WebKit2/NetworkProcessProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/Network/NetworkProcessProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/NetworkProcessProxyMessageReceiver.cpp
> [ 83%] Generating ../../DerivedSources/WebKit2/LegacyCustomProtocolManagerProxyMessageReceiver.cpp, ../../DerivedSources/WebKit2/LegacyCustomProtocolManagerProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/Network/CustomProtocols/LegacyCustomProtocolManagerProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/LegacyCustomProtocolManagerProxyMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/Network/NetworkProcessProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/NetworkProcessProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/Downloads/DownloadProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/DownloadProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/Automation/WebAutomationSession.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebAutomationSessionMessages.h
> [ 83%] Generating ../../DerivedSources/WebKit2/PluginProcessProxyMessageReceiver.cpp, ../../DerivedSources/WebKit2/PluginProcessProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/Plugins/PluginProcessProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/PluginProcessProxyMessageReceiver.cpp
> [ 84%] Generating ../../DerivedSources/WebKit2/StorageProcessProxyMessageReceiver.cpp, ../../DerivedSources/WebKit2/StorageProcessProxyMessages.h
> [ 84%] Generating ../../DerivedSources/WebKit2/WebUserContentControllerProxyMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebUserContentControllerProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/Storage/StorageProcessProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/StorageProcessProxyMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/UserContent/WebUserContentControllerProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebUserContentControllerProxyMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/Network/CustomProtocols/LegacyCustomProtocolManagerProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/LegacyCustomProtocolManagerProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/Plugins/PluginProcessProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/PluginProcessProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/Storage/StorageProcessProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/StorageProcessProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/UserContent/WebUserContentControllerProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebUserContentControllerProxyMessages.h
> [ 84%] Generating ../../DerivedSources/WebKit2/StorageManagerMessageReceiver.cpp, ../../DerivedSources/WebKit2/StorageManagerMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py UIProcess/WebStorage/StorageManager.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/StorageManagerMessageReceiver.cpp
> [ 84%] Generating ../../DerivedSources/WebKit2/WebProcessMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebProcessMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/WebProcess.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebProcessMessageReceiver.cpp
> [ 84%] Generating ../../DerivedSources/WebKit2/WebAutomationSessionProxyMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebAutomationSessionProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/Automation/WebAutomationSessionProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebAutomationSessionProxyMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py UIProcess/WebStorage/StorageManager.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/StorageManagerMessages.h
> [ 84%] Generating ../../DerivedSources/WebKit2/WebCookieManagerMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebCookieManagerMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/Cookies/WebCookieManager.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebCookieManagerMessageReceiver.cpp
> [ 84%] Generating ../../DerivedSources/WebKit2/WebIDBConnectionToServerMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebIDBConnectionToServerMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/WebProcess.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebProcessMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/Automation/WebAutomationSessionProxy.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebAutomationSessionProxyMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/Cookies/WebCookieManager.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebCookieManagerMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/Databases/IndexedDB/WebIDBConnectionToServer.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebIDBConnectionToServerMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/Databases/IndexedDB/WebIDBConnectionToServer.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebIDBConnectionToServerMessages.h
> [ 84%] Generating ../../DerivedSources/WebKit2/WebFullScreenManagerMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebFullScreenManagerMessages.h
> [ 84%] Generating ../../DerivedSources/WebKit2/WebGeolocationManagerMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebGeolocationManagerMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/FullScreen/WebFullScreenManager.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebFullScreenManagerMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/Geolocation/WebGeolocationManager.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebGeolocationManagerMessageReceiver.cpp
> [ 84%] Generating ../../DerivedSources/WebKit2/WebRTCMonitorMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebRTCMonitorMessages.h
> [ 84%] Generating ../../DerivedSources/WebKit2/WebRTCResolverMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebRTCResolverMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/Network/webrtc/WebRTCMonitor.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebRTCMonitorMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/Network/webrtc/WebRTCResolver.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebRTCResolverMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/FullScreen/WebFullScreenManager.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebFullScreenManagerMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/Geolocation/WebGeolocationManager.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebGeolocationManagerMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/Network/webrtc/WebRTCMonitor.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebRTCMonitorMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/Network/webrtc/WebRTCResolver.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebRTCResolverMessages.h
> [ 84%] Generating ../../DerivedSources/WebKit2/WebRTCSocketMessageReceiver.cpp, ../../DerivedSources/WebKit2/WebRTCSocketMessages.h
> Traceback (most recent call last):
>   File "/tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py", line 28, in <module>
>     import webkit.messages
> EOFError: EOF read where object expected
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/Network/webrtc/WebRTCSocket.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebRTCSocketMessageReceiver.cpp
> make[2]: *** [Source/WebKit/CMakeFiles/WebKit2.dir/build.make:722: DerivedSources/WebKit2/WebRTCMonitorMessageReceiver.cpp] Error 1
> make[2]: *** Deleting file 'DerivedSources/WebKit2/WebRTCMonitorMessageReceiver.cpp'
> make[2]: *** Waiting for unfinished jobs....
> [ 84%] Generating ../../DerivedSources/WebKit2/NetworkProcessConnectionMessageReceiver.cpp, ../../DerivedSources/WebKit2/NetworkProcessConnectionMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-message-receiver.py WebProcess/Network/NetworkProcessConnection.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/NetworkProcessConnectionMessageReceiver.cpp
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/Network/webrtc/WebRTCSocket.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/WebRTCSocketMessages.h
> cd /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit && /gnu/store/zlbbayv8rv6z7gnhz435gjq8pzjm06v6-python-2.7.13/bin/python2.7 /tmp/guix-build-webkitgtk-2.18.4.drv-0/webkitgtk-2.18.4/Source/WebKit/Scripts/generate-messages-header.py WebProcess/Network/NetworkProcessConnection.messages.in > /tmp/guix-build-webkitgtk-2.18.4.drv-0/build/DerivedSources/WebKit2/NetworkProcessConnectionMessages.h
> make[2]: Leaving directory '/tmp/guix-build-webkitgtk-2.18.4.drv-0/build'
> make[1]: *** [CMakeFiles/Makefile2:1581: Source/WebKit/CMakeFiles/WebKit2.dir/all] Error 2
> make[1]: Leaving directory '/tmp/guix-build-webkitgtk-2.18.4.drv-0/build'
> make: *** [Makefile:153: all] Error 2
> phase `build' failed after 5645.4 seconds
> builder for `/gnu/store/hp17k74lrlbm62gg5321dqf2r99m5d3q-webkitgtk-2.18.4.drv' failed with exit code 1
> @ build-failed /gnu/store/hp17k74lrlbm62gg5321dqf2r99m5d3q-webkitgtk-2.18.4.drv - 1 builder for `/gnu/store/hp17k74lrlbm62gg5321dqf2r99m5d3q-webkitgtk-2.18.4.drv' failed with exit code 1
> --8<---------------cut here---------------end--------------->8---
> 
> On my X200, the build succeeded on my first try.
> 
> Would someone like to investigate further?
> 
>        Mark
> 

Not sure where to trim this to make it shorter so I've just left the
whole message. I had to build webkitgtk twice on aarch64 for it to build
sucessfully, also with the EOF error.

-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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