Debugger: Better fallback for resolving function local struct types

Function-local struct definitions produces types 'names' like
'QList<main(int, char**)::SomeStruct>'. Remove the part up to
the '::' and rely on local lookup.

Task-number: QTCREATORBUG-15400
Change-Id: Ic73005f294c5f62c504b2d7ded4dd2716d88f2e4
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

share/qtcreator/debugger/dumper.py

@@ -667,7 +667,12 @@ class DumperBase:
                 else:
                     inner += c
                     skipSpace = False
-        return inner.strip()
+        # Handle local struct definitions like QList<main(int, char**)::SomeStruct>
+        inner = inner.strip()
+        p = inner.find(')::')
+        if p > -1:
+            inner = inner[p+3:]
+        return inner
 
     def putStringValueByAddress(self, addr):
         elided, data = self.encodeStringHelper(addr, self.displayStringLimit)