Fix crash in gdscript when autocompleting virtual function and signature does not match base.

1 files changed, 13 insertions, 11 deletions

diff --git a/modules/gdscript/gdscript_editor.cpp b/modules/gdscript/gdscript_editor.cpp
index f88ac581ca..12c10642ec 100644
--- a/modules/gdscript/gdscript_editor.cpp
+++ b/modules/gdscript/gdscript_editor.cpp
@@ -1953,17 +1953,19 @@ static bool _guess_identifier_type(GDScriptParser::CompletionContext &p_context,
 				case GDScriptParser::DataType::CLASS:
 					if (base_type.class_type->has_function(p_context.current_function->identifier->name)) {
 						GDScriptParser::FunctionNode *parent_function = base_type.class_type->get_member(p_context.current_function->identifier->name).function;
-						const GDScriptParser::ParameterNode *parameter = parent_function->parameters[parent_function->parameters_indices[p_identifier]];
-						if ((!id_type.is_set() || id_type.is_variant()) && parameter->get_datatype().is_hard_type()) {
-							id_type = parameter->get_datatype();
-						}
-						if (parameter->initializer) {
-							GDScriptParser::CompletionContext c = p_context;
-							c.current_function = parent_function;
-							c.current_class = base_type.class_type;
-							c.base = nullptr;
-							if (_guess_expression_type(c, parameter->initializer, r_type)) {
-								return true;
+						if (parent_function->parameters_indices.has(p_identifier)) {
+							const GDScriptParser::ParameterNode *parameter = parent_function->parameters[parent_function->parameters_indices[p_identifier]];
+							if ((!id_type.is_set() || id_type.is_variant()) && parameter->get_datatype().is_hard_type()) {
+								id_type = parameter->get_datatype();
+							}
+							if (parameter->initializer) {
+								GDScriptParser::CompletionContext c = p_context;
+								c.current_function = parent_function;
+								c.current_class = base_type.class_type;
+								c.base = nullptr;
+								if (_guess_expression_type(c, parameter->initializer, r_type)) {
+									return true;
+								}
 							}
 						}
 					}