ConcurrentModificationException while editing large files

(SHADE 2249)

The file in question has more than 20000 lines.

Information from log:

java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at org.erlide.core.internal.model.erlang.ErlModule.exportsAllFunctions(ErlModule.java:685)
at org.erlide.core.internal.model.erlang.ErlFunction.isExported(ErlFunction.java:81)
at org.erlide.ui.editors.erl.outline.ErlangElementImageProvider.getBaseImageDescriptor(ErlangElementImageProvider.java:196)
at org.erlide.ui.editors.erl.outline.ErlangElementImageProvider.getErlImageDescriptor(ErlangElementImageProvider.java:159)
at org.erlide.ui.editors.erl.outline.ErlangElementImageProvider.computeDescriptor(ErlangElementImageProvider.java:106)
at org.erlide.ui.editors.erl.outline.ErlangElementImageProvider.getImageLabel(ErlangElementImageProvider.java:86)
at org.erlide.ui.editors.erl.outline.ErlangLabelProvider.getImage(ErlangLabelProvider.java:142)