This error occurred when stopping a bundle:

16:19:57.466 [Felix Shell T] ERROR o.j.w.e.o.i.i.Weld - Shutdown of Weld instance for bundle org.jboss.weld.osgi.examples.weld-osgi-paint-triangle [14] caused an error: java.lang.StringIndexOutOfBoundsException: String index out of range: -1

This is a cal10n bug when a message contain the string

\\"

Which is the case in ./impl/src/main/resources/org/jboss/weld/messages/context_en.properties

The version 0.7.7 which is already used in the 2.0.0 branch. The fix consists in cherry picking the changesets in the 1.2 branch