In jedit 5.3.0 search for regex \$Order-\>{
produces
java.util.regex.PatternSyntaxException: Illegal repetition near index 9 \$Order-\>{ ^ at java.util.regex.Pattern.error(Pattern.java:1955) at java.util.regex.Pattern.closure(Pattern.java:3157) at java.util.regex.Pattern.sequence(Pattern.java:2134) at java.util.regex.Pattern.expr(Pattern.java:1996) at java.util.regex.Pattern.compile(Pattern.java:1696) at java.util.regex.Pattern.<init>(Pattern.java:1351) at java.util.regex.Pattern.compile(Pattern.java:1054) at org.gjt.sp.jedit.search.SearchAndReplace.getSearchMatcher(SearchAndReplace.java:326) at org.gjt.sp.jedit.search.SearchAndReplace.hyperSearch(SearchAndReplace.java:416) at org.gjt.sp.jedit.search.SearchAndReplace.hyperSearch(SearchAndReplace.java:385) at org.gjt.sp.jedit.search.SearchBar.find(SearchBar.java:220) at org.gjt.sp.jedit.search.SearchBar.access$400(SearchBar.java:41) at org.gjt.sp.jedit.search.SearchBar$ActionHandler.actionPerformed(SearchBar.java:360) at javax.swing.JTextField.fireActionPerformed(JTextField.java:508) at org.gjt.sp.jedit.gui.HistoryTextField.fireActionPerformed(HistoryTextField.java:228) at org.gjt.sp.jedit.gui.HistoryTextField.processKeyEvent(HistoryTextField.java:249) at java.awt.Component.processEvent(Component.java:6310) at java.awt.Container.processEvent(Container.java:2236) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2294) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954) at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806) at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771) at java.awt.Component.dispatchEventImpl(Component.java:4760) at java.awt.Container.dispatchEventImpl(Container.java:2294) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90) at java.awt.EventQueue$4.run(EventQueue.java:731) at java.awt.EventQueue$4.run(EventQueue.java:729) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) at org.GNOME.Accessibility.AtkWrapper$5.dispatchEvent(AtkWrapper.java:700) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Your regexp is broken: the last { must be escaped.