Cevelop blows up at startup

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Expected Behavior

Cevelop starts

Actual Behavior

Cevelop 1.11.1 appears but is unusable; Progress shows lots of "Deleting marker ..." actions. After a while, "Multiple errors happened" pops up with several "Internal error" and "Unable to create native thread" entries. Finally, an internal error happens during an internal error, and the option is given to exit the workbench.

This does not happen with Cevelop 1.10.1

Cevelop Version, Operating System and Compiler

Cevelop 1.11.1, Linux 64bit, Ubuntu 18.04.2 LTS

Logs attached: cevelop-fail.zip

cevelop.ini:

-startup
plugins/org.eclipse.equinox.launcher_1.5.200.v20180922-1751.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.900.v20180922-1751
-vmargs
#-XX:MaxPermSize=512m
-XX:+UseG1GC
-Xms128m
-Xmx8000m
-Dorg.eclipse.swt.browser.DefaultType=webkit
-Dorg.eclipse.swt.browser.UseWebKitGTK=true

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Circumstances unclear