Fixed in http://hg.netbeans.org/cnd-main/rev/cf5999fae340

Integrated into 'main-silver', will be available in build *201410080001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)

Changeset: http://hg.netbeans.org/main-silver/rev/cf5999fae340
User: Petr Kudryavtsev <petrk@netbeans.org>
Log: Fixed #247751 - Provide tooltips and navigation for auto variables

Integrated into 'main-silver', will be available in build *201410090001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)

Changeset: http://hg.netbeans.org/main-silver/rev/c37c813e46c9
User: Petr Kudryavtsev <petrk@netbeans.org>
Log: Additional fix for #247751 - Provide tooltips and navigation for auto variables
-- added expanding of type in tooltip for variables

Integrated into 'main-silver', will be available in build *201410160001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)

Changeset: http://hg.netbeans.org/main-silver/rev/b3449e4f57be
User: Petr Kudryavtsev <petrk@netbeans.org>
Log: Additional fix for #247751 - Provide tooltips and navigation for auto variables
-- added unfolding of auto types

Integrated into 'main-silver', will be available in build *201410170001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)

Changeset: http://hg.netbeans.org/main-silver/rev/73166f5a3f92
User: Petr Kudryavtsev <petrk@netbeans.org>
Log: Additional fix for #247751 - Provide tooltips and navigation for auto variables
-- tooltips on auto variable and on keyword itself are synchronized

Integrated into 'main-silver', will be available in build *201411070002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)

Changeset: http://hg.netbeans.org/main-silver/rev/35fc92410df5
User: Petr Kudryavtsev <petrk@netbeans.org>
Log: Additional fix for #247751 - Provide tooltips and navigation for auto variables
-- changed placing of spaces if type has several qualifiers

C++11 code:
#include <cstdlib>

using namespace std;

int main(int argc, char** argv) {
    auto l = [] () {
        return 0;
    };
    l();
    int a = 1;
    auto b = a;
    return 0;
}

Scenario:
- Press Ctrl and move mouse on 'auto' in "auto b = a;" line
==>
java.lang.AssertionError: why null item? object BUILT_IN int iof class org.netbeans.modules.cnd.modelimpl.csm.BuiltinTypes$BuiltinImpl in exprexpID=TYPE, result type=auto, token count=1, token0='auto', parm count=0
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.convertData(CsmCompletionQuery.java:3906)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.access$2500(CsmCompletionQuery.java:162)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery$CsmCompletionResult.<init>(CsmCompletionQuery.java:3548)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery$Context.resolveItem(CsmCompletionQuery.java:2580)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery$Context.resolveExp(CsmCompletionQuery.java:1878)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.getResolvedContext(CsmCompletionQuery.java:830)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.getResult(CsmCompletionQuery.java:787)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.queryImpl(CsmCompletionQuery.java:570)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.query(CsmCompletionQuery.java:515)
	at org.netbeans.modules.cnd.completion.cplusplus.ext.CsmCompletionQuery.query(CsmCompletionQuery.java:508)
	at org.netbeans.modules.cnd.completion.csm.CompletionUtilities.findItemsReferencedAtCaretPos(CompletionUtilities.java:161)
	at org.netbeans.modules.cnd.completion.impl.xref.ReferencesSupport.findDeclaration(ReferencesSupport.java:465)
	at org.netbeans.modules.cnd.completion.impl.xref.ReferencesSupport.findDeclaration(ReferencesSupport.java:405)
	at org.netbeans.modules.cnd.completion.impl.xref.ReferencesSupport.findDeclaration(ReferencesSupport.java:263)
	at org.netbeans.modules.cnd.completion.cplusplus.hyperlink.CsmHyperlinkProvider.findTargetObject(CsmHyperlinkProvider.java:451)
	at org.netbeans.modules.cnd.completion.cplusplus.hyperlink.CsmHyperlinkProvider.getTooltipText(CsmHyperlinkProvider.java:583)
	at org.netbeans.modules.cnd.completion.cplusplus.hyperlink.CsmAbstractHyperlinkProvider.getTooltipText(CsmAbstractHyperlinkProvider.java:235)
	at org.netbeans.lib.editor.hyperlink.HyperlinkOperation$TooltipResolver.getValue(HyperlinkOperation.java:511)
	at org.netbeans.lib.editor.hyperlink.HyperlinkOperation$TooltipResolver.getValue(HyperlinkOperation.java:496)
	at org.netbeans.modules.editor.NbToolTip$Request.getTooltipFromHighlightingLayers(NbToolTip.java:448)
	at org.netbeans.modules.editor.NbToolTip$Request.resolveTooltipText(NbToolTip.java:436)
	at org.netbeans.modules.editor.NbToolTip$Request.run(NbToolTip.java:365)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1425)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:59)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:294)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2038)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to
	at org.openide.util.RequestProcessor.post(RequestProcessor.java:420)
	at org.netbeans.modules.editor.NbToolTip.buildTip(NbToolTip.java:275)
	at org.netbeans.modules.editor.NbToolTip.buildToolTip(NbToolTip.java:117)
	at org.netbeans.modules.editor.NbEditorKit$NbBuildToolTipAction.actionPerformed(NbEditorKit.java:974)
	at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:337)
	at org.netbeans.spi.editor.AbstractEditorAction.actionPerformed(AbstractEditorAction.java:462)
	at org.netbeans.editor.ext.ToolTipSupport.updateToolTip(ToolTipSupport.java:564)
	at org.netbeans.editor.ext.ToolTipSupport.setToolTipVisible(ToolTipSupport.java:629)
	at org.netbeans.editor.ext.ToolTipSupport.setToolTipVisible(ToolTipSupport.java:587)
	at org.netbeans.editor.ext.ToolTipSupport$Listener.actionPerformed(ToolTipSupport.java:1115)
	at org.netbeans.editor.WeakTimerListener.actionPerformed(WeakTimerListener.java:88)
	at javax.swing.Timer.fireActionPerformed(Timer.java:312)
	at javax.swing.Timer$DoPostEvent.run(Timer.java:244)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:694)
	at java.awt.EventQueue$3.run(EventQueue.java:692)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
[catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

Fixed in http://hg.netbeans.org/cnd-main/rev/8595c30ebd5b

Integrated into 'main-silver', will be available in build *201411080653* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)

Changeset: http://hg.netbeans.org/main-silver/rev/8595c30ebd5b
User: Petr Kudryavtsev <petrk@netbeans.org>
Log: Additional fix for #247751 - Provide tooltips and navigation for auto variables
-- fixed assertion in case of hyperlinking to auto type which has built-in type underneath

Integrated into 'releases/release801', will be available in build *201411102027* or newer. Wait for official and publicly available build.

Changeset: http://hg.netbeans.org/releases/rev/04a61662e027
User: Petr Kudryavtsev <petrk@netbeans.org>
Log: Fixed #247751 - Provide tooltips and navigation for auto variables
(transplanted from cf5999fae3407220fbb152d84fedc72545104f8d)