gdbhooks.py: Fix UnicodeDecodeErrors when printing trees with corrupt codes.

	* gdbhooks.py: Fix UnicodeDecodeErrors when printing trees with
	corrupt codes.

From-SVN: r270607

gcc/ChangeLog

+2018-04-26  Eugene Sharygin  <eush@ispras.ru>
+
+	* gdbhooks.py: Fix UnicodeDecodeErrors when printing trees with
+	corrupt codes.
+
 2019-04-26  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* tree.h (TYPE_VECTOR_SUBPARTS, SET_TYPE_VECTOR_SUBPARTS): Add

gcc/gdbhooks.py

@@ -229,7 +229,10 @@ class TreePrinter:
         val_code_name = val_tree_code_name[intptr(val_TREE_CODE)]
         #print(val_code_name.string())
 
+        try:
             result = '<%s 0x%x' % (val_code_name.string(), intptr(self.gdbval))
+        except:
+            return '<tree 0x%x>' % intptr(self.gdbval)
         if intptr(val_tclass) == tcc_declaration:
             tree_DECL_NAME = self.node.DECL_NAME()
             if tree_DECL_NAME.is_nonnull():