Bug 122261 [typing] NullPointerException when performing "Correct indentation" and the first code line is a single-line comment
To reproduce: Create a java file that has a single line comment as its very first line. For example: // this comment at the starting of the file is evil // package indentbug; public class Bug { /** * To reproduce: Select the whole document and * perform "Source->Correct indentation". * (i. e. Ctrl+A, Ctrl+I) */ } When reindenting it, the following exception occurs: !SESSION 2005-12-28 19:42:55.216 ----------------------------------------------- eclipse.buildId=M20050929-0840 java.version=1.5.0_05 java.vendor=Sun Microsystems Inc. BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=de_DE Command-line arguments: -os win32 -ws win32 -arch x86 !ENTRY org.eclipse.ui 4 4 2005-12-28 19:43:05.391 !MESSAGE "Indent Line" did not complete normally. Please see the log for more information. !ENTRY org.eclipse.ui 4 0 2005-12-28 19:43:05.391 !MESSAGE java.lang.NullPointerException !STACK 0 java.lang.NullPointerException at org.eclipse.jdt.internal.ui.actions.IndentAction.indentLine(IndentAction.java:243) at org.eclipse.jdt.internal.ui.actions.IndentAction.access$2(IndentAction.java:219) at org.eclipse.jdt.internal.ui.actions.IndentAction$1.run(IndentAction.java:141) at org.eclipse.jdt.internal.ui.actions.IndentAction.run(IndentAction.java:182) at org.eclipse.jface.action.Action.runWithEvent(Action.java:996) at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:182) at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:108) at org.eclipse.core.commands.Command.execute(Command.java:311) at org.eclipse.core.commands.ParameterizedCommand.execute(ParameterizedCommand.java:396) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:459) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:781) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:828) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:550) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:493) at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:117) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Display.filterEvent(Display.java:917) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:842) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:867) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:852) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:880) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:876) at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1190) at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:3135) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3038) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1656) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2711) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1699) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334) at org.eclipse.core.launcher.Main.basicRun(Main.java:278) at org.eclipse.core.launcher.Main.run(Main.java:973) at org.eclipse.core.launcher.Main.main(Main.java:948)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/actions/IndentAction.java
int tabSize= getTabSize();
				while (slashes > 0 && computed.length() > 0) {
					char c= computed.charAt(0);
					if (c == '\t')
						if (slashes > tabSize)
							slashes-= tabSize;
						else
							break;
					else if (c == ' ')
						slashes--;
					else break;
					
					computed.deleteCharAt(0);
				}
				
				indent= document.get(offset, wsStart - offset) + computed;
				
			}
		} 
		
		
		if (indent == null) {
			StringBuffer computed= indenter.computeIndentation(offset);
			if (computed != null)
				indent= computed.toString();
			else
				indent= new String();
		}