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This bug was originally marked as duplicate of bug 183280, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.2 (Build 201609300101) VM: Java HotSpot(TM) 64-Bit Server VM, 25.65-b01, Java(TM) SE Runtime Environment, 1.8.0_65-b17 OS: Windows 8.1 User Comments: GUEST: <input type="text" onkeyup="value=value.replace(/[^\w\.\/]/ig,'')" name="username" id="username" value="??????" onFocus="if(value===defaultValue){value='';this.style.color='#000'}" style="color: #999999; background: url(images/input.png)no-repeat;padding-left: 20px; width:100%;height: 42px;border: 0;margin-left: -2px" required /> ?????alt+enter???? Stacktrace: java.lang.NullPointerException: The folder parameter cannot be null at org.openide.util.Parameters.notNull(Parameters.java:89) at org.openide.filesystems.FileUtil.isParentOf(FileUtil.java:1444) at org.openide.filesystems.FileUtil.getRelativePath(FileUtil.java:1191) at org.netbeans.modules.html.editor.refactoring.ExtractInlinedStylePanel$ExternalStyleSheetItem.<init>(ExtractInlinedStylePanel.java:551) at org.netbeans.modules.html.editor.refactoring.ExtractInlinedStylePanel.createExternalStylesheetsModel(ExtractInlinedStylePanel.java:457) at org.netbeans.modules.html.editor.refactoring.ExtractInlinedStylePanel.initComponents(ExtractInlinedStylePanel.java:314)
Created attachment 163817 [details] stacktrace