Fix crash with unnamed function self reference in DWARF import

Author: emesare

plugins/dwarf/dwarf_import/src/die_handlers.rs

@@ -316,11 +316,9 @@ pub(crate) fn handle_function<R: ReaderType>(
     };
 
     // Alias function type in the case that it contains itself
-    if let Some(name) = debug_info_builder_context.get_name(dwarf, unit, entry) {
-        let ntr =
-            Type::named_type_from_type(&name, &Type::function(return_type.as_ref(), vec![], false));
-        debug_info_builder.add_type(get_uid(dwarf, unit, entry), name, ntr, false);
-    }
+    let name = debug_info_builder_context.get_name(dwarf, unit, entry).unwrap_or("_unnamed_func".to_string());
+    let ntr = Type::named_type_from_type(&name, &Type::function(return_type.as_ref(), vec![], false));
+    debug_info_builder.add_type(get_uid(dwarf, unit, entry), name, ntr, false);
 
     let mut parameters: Vec<FunctionParameter> = vec![];
     let mut variable_arguments = false;
@@ -350,12 +348,8 @@ pub(crate) fn handle_function<R: ReaderType>(
         }
     }
 
-    if debug_info_builder_context
-        .get_name(dwarf, unit, entry)
-        .is_some()
-    {
-        debug_info_builder.remove_type(get_uid(dwarf, unit, entry));
-    }
+    // Remove the aliased type from the builder.
+    debug_info_builder.remove_type(get_uid(dwarf, unit, entry));
 
     Some(Type::function(
         return_type.as_ref(),