I came back from an unattended build to find ...
> /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java: > In class 'javax.swing.plaf.basic.BasicLookAndFeel': > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java: > In method > 'javax.swing.plaf.basic.BasicLookAndFeel.initComponentDefaults(javax.swing.UIDefaults)': > In file included from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:198:0, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:1079, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:812, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:798, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:557, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:536, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:528, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:498, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicListUI.java:589, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicListUI.java:546, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicListUI.java:184, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicListUI.java:163, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicListUI.java:414, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicListUI.java:120, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicListUI.java:1420, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicListUI.java:214, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLabelUI.java:540, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLabelUI.java:438, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:1069, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:965, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:675, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:1061, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:875, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:479, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:1784, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:419, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java:161, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:494, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:384, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:287, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:260, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:331, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:523, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:221, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:194, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:150, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:111, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java:1013, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicIconFactory.java:211, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicIconFactory.java:56, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicIconFactory.java:326, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicIconFactory.java:167, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicIconFactory.java:117, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicIconFactory.java:276, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicIconFactory.java:242, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicHTML.java:373, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicHTML.java:470, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicGraphicsUtils.java:818, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFormattedTextFieldUI.java:67, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:597, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:571, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:531, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:495, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:464, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:776, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:364, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:335, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:305, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:176, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicFileChooserUI.java:113, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicEditorPaneUI.java:149, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDirectoryModel.java:149, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDirectoryModel.java:94, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDirectoryModel.java:83, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDirectoryModel.java:338, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopPaneUI.java:265, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopPaneUI.java:223, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopPaneUI.java:176, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopPaneUI.java:137, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopPaneUI.java:98, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopPaneUI.java:470, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java:153, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java:287, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java:159, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java:591, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java:359, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java:485, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicDesktopIconUI.java:476, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:1014, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:1086, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:979, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:953, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:1069, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:928, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:896, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:836, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:1102, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboPopup.java:1041, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxUI.java:1408, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxUI.java:1312, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxUI.java:1223, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxUI.java:1181, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxUI.java:1151, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxUI.java:1108, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxUI.java:1022, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxRenderer.java:149, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxRenderer.java:133, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxEditor.java:178, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicComboBoxEditor.java:163, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicColorChooserUI.java:116, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicColorChooserUI.java:85, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicColorChooserUI.java:92, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicColorChooserUI.java:343, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicColorChooserUI.java:206, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicCheckBoxUI.java:73, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicCheckBoxMenuItemUI.java:101, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicButtonUI.java:634, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicButtonListener.java:369, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicButtonListener.java:76, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicButtonListener.java:239, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicButtonListener.java:226, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:1764, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:1635, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:1502, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:1252, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:1163, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:1009, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:853, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:749, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:408, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicBorders.java:583, > from > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicArrowButton.java:423, > from <built-in>:493: > /gnu/gcc/gcc/libjava/classpath/javax/swing/plaf/basic/BasicLookAndFeel.java:483:0: > note: variable tracking size limit exceeded with -fvar-tracking-assignments, > retrying without Re-running the build command manually spins CPU quite hard for about a minute or just over before it gives up on vta and then takes about another ten seconds to complete. Comment #2 in the PR talks about some "usual KDE var-tracking issue", but this suggests it's a more general problem, perhaps? cheers, DaveK