My original post on this topic was closed after 30 days. I now have a repeat appearance of the crash with the following terminal output:
~> evolution
ERROR: WebKit encountered an internal error. This is a WebKit bug.
/home/abuild/rpmbuild/BUILD/webkit2gtk3-2.50.4-build/webkitgtk-2.50.4/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp(716) : void WebKit::WebLoaderStrategy::networkProcessCrashed()
ERROR: WebKit encountered an internal error. This is a WebKit bug.
/home/abuild/rpmbuild/BUILD/webkit2gtk3-2.50.4-build/webkitgtk-2.50.4/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp(716) : void WebKit::WebLoaderStrategy::networkProcessCrashed()
ERROR: WebKit encountered an internal error. This is a WebKit bug.
/home/abuild/rpmbuild/BUILD/webkit2gtk3-2.50.4-build/webkitgtk-2.50.4/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp(716) : void WebKit::WebLoaderStrategy::networkProcessCrashed()
ERROR: WebKit encountered an internal error. This is a WebKit bug.
/home/abuild/rpmbuild/BUILD/webkit2gtk3-2.50.4-build/webkitgtk-2.50.4/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp(716) : void WebKit::WebLoaderStrategy::networkProcessCrashed()
Illegal instruction (core dumped) evolution
Can anyone make sense of this?