diff -r da7e4df94076 -r bd743eacfbca eric6/Debugger/VariablesViewer.py
--- a/eric6/Debugger/VariablesViewer.py Wed Jan 08 18:57:10 2020 +0100
+++ b/eric6/Debugger/VariablesViewer.py Wed Jan 08 18:58:31 2020 +0100
@@ -690,7 +690,10 @@
indentation = 0
# Check if text is longer than available space
fontMetrics = QFontMetrics(self.treeView.font())
- textSize = fontMetrics.width(tooltip)
+ try:
+ textSize = fontMetrics.horizontalAdvance(tooltip)
+ except AttributeError:
+ textSize = fontMetrics.width(tooltip)
textSize += indentation + 5 # How to determine border size?
header = self.treeView.header()
if textSize >= header.sectionSize(column):
