Created attachment 131339 [details]
stacktrace

Created attachment 131374 [details]
stacktrace

Created attachment 131456 [details]
stacktrace

In my case, it's 

         catch( IOException | EJBTransactionRolledbackException ex ) {

Makes editing of some sources impossible, I dare setting P2.

NetBeans IDE Build 201302020001

Created attachment 131484 [details]
stacktrace

Stepping over some code with the debugger, this is caused by an exception beeing thrown in the debugger when it accesses the data.
Code below.
  TableColumn[] needResolving = new TableColumn[0];
    boolean resolvLater = false;
    try {
      // Create an entity instance
      data = table.classFor.newInstance(); <-- Problem appears here when data is created
    } catch (InstantiationException | IllegalAccessException ex) {
      throw new RuntimeException(ex);
    }                                                            <-- This is thrown here!
    // A table.callPreLoad would have been here if it made any sense
    // Transform the data
    for (int col = 0; col < table.columns.length; col++) {

I stepped one line more after this had occured and then #658789 (report #198675) occured

Created attachment 131522 [details]
stacktrace

This bug already has 10 duplicates 
see http://statistics.netbeans.org/exceptions/detail.do?id=198158

Created attachment 131688 [details]
stacktrace

I tried to use multicatch. Now this sring highlighted with red (as error) but source was changed to Java 7 after this error appeared.

reproducible

my steps to reproduce:
1) have a code:
try {
	    FileReader fileReader = new FileReader("");
	    URL r = new URL("asadsadasdasda");
	} catch (MalformedURLException ex) {
	    Logger.getLogger(NewJFrame.class.getName()).log(Level.SEVERE, null, ex);
	} catch (FileNotFoundException ex) {
	    Logger.getLogger(NewJFrame.class.getName()).log(Level.SEVERE, null, ex);
	}

2) apply 'change to multicatch' hint



Product Version: NetBeans IDE Dev (Build 20130220-b02dbd2e0ef0)
Java: 1.7.0_15; Java HotSpot(TM) 64-Bit Server VM 23.7-b01
Runtime: Java(TM) SE Runtime Environment 1.7.0_15-b03
System: Windows 7 version 6.1 running on amd64; Cp1250; en_US (nb)
User directory: C:\Users\jprox\AppData\Roaming\NetBeans\dev
Cache directory: C:\Users\jprox\AppData\Local\NetBeans\Cache\dev

Created attachment 132746 [details]
stacktrace

CCE when calling code completion in following method:

 public void process (FooInnerClass callback) {
	System.out.println("callback");
	String fieldName = "";
	"".matches("");
	Class clazz = callback.getClass();
	try {

	    final Field field = clazz.getField(fieldName); //marked as error


	}
	catch (IntrospectionException | SecurityException ex) {
	    throw new RuntimeException(ex);
	}


    }

Fixed in jet-main.

http://hg.netbeans.org/jet-main/rev/2afe7ca05491

Integrated into 'main-golden', will be available in build *201303232300* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
Changeset: http://hg.netbeans.org/main-golden/rev/2afe7ca05491
User: Dusan Balek <dbalek@netbeans.org>
Log: Issue #226053 - Mishandled JDK 1.7 multi catch - fixed.

Verified with build 201305212300. Thanks to everybody involved!