Merge branch 'master' into patch-2

Author: hitblunders

src/maintainer/maintainer_faq.rst

@@ -95,9 +95,19 @@ FAQ
 You are seeing this error message because by default, conda-build uses conda-verify to ensure that your recipe and package meet some minimum sanity checks. 
 This message can be safely ignored as conda-forge doesn't use conda-verify. 
 
+
     .. _mfaq_version_update:
 
 :ref:`(Q) <mfaq_version_update>` **When the bot creates a pull request to a feedstock to update the version, should I approve the pull request and wait with merging until everybody else that is a code owner has approved the PR?**
 
    There is no need to approve the PR. Every maintainer can verify and merge the bot PR without waiting on the approval of the other maintainers.
 
+
+
+:ref:`(Q) <mfaq_docker_139>` **How to fix "build-locally.py fails with exit code 139"?**
+
+    With Linux Kernel 4.11 there were some changes in the ``vsyscall`` linking. Depending on your distribution this may cause the above error. You can fix that on Debian by editing ``/etc/default/grub`` and specifiy ``GRUB_CMDLINE_LINUX_DEFAULT="vsyscall=emulate"`` in this file. Afterwards, you need to run ``update-grub`` and reboot your system. On other Linux distributions the fix is similar but you need to edit a different configuration file to change the Linux kernel cmdline. This workaround is only needed for images based on CentOS 6 (``cos6``). You could also workaround this by forcing the CentOS 7 based images using ``DOCKER_IMAGE=quay.io/condaforge/linux-anvil-cos7-x86_64 ./build-locally.py``.
+
+    The exit code 139 itself actually is the general exit code for a segmentation fault. This could also mean that you have run into a different issue but the above issue is the most likely one with our CentOS 6-based images.
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+