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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Incorrect reflection call leads to compilation errors","articleBody":"**Description**\r\n\r\nTry to generate tests for the following class, set timeout at least to 60s.\r\n\r\n```java\r\nimport org.antlr.runtime.tree.TreeVisitor;\r\nimport org.antlr.runtime.tree.TreeVisitorAction;\r\nimport org.antlr.v4.parse.GrammarASTAdaptor;\r\nimport org.antlr.v4.tool.ast.GrammarAST;\r\n\r\npublic class Grammarin {\r\n    public void setGrammarPtr(final org.antlr.v4.tool.Grammar g, GrammarAST tree) {\r\n        if (tree != null) {\r\n            TreeVisitor v = new TreeVisitor(new GrammarASTAdaptor());\r\n            v.visit(tree, new TreeVisitorAction() {\r\n                public Object pre(Object t) {\r\n                    ((GrammarAST) t).g = g;\r\n                    return t;\r\n                }\r\n\r\n                public Object post(Object t) {\r\n                    return t;\r\n                }\r\n            });\r\n        }\r\n    }\r\n}\r\n```\r\n\r\nThe following code i generated:\r\n\r\n```java\r\n    @Test\r\n    @DisplayName(\"setGrammarPtr: -\u003e tree != null : True\")\r\n    public void testSetGrammarPtr_TreeNotEqualsNull_2() throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException {\r\n        Grammarin grammarin = new Grammarin();\r\n        GrammarRootAST tree = new GrammarRootAST(null);\r\n        tree.token = null;\r\n        Class baseTreeClazz = Class.forName(\"org.antlr.runtime.tree.BaseTree\");\r\n        Field childrenField = baseTreeClazz.getDeclaredField(\"children\");\r\n        childrenField.setAccessible(true);\r\n        childrenField.get(tree) = new ArrayList();\r\n\r\n        grammarin.setGrammarPtr(null, tree);\r\n    }\r\n```\r\n\r\nLine with getter leads to the compilation error\r\n```\r\nchildrenField.get(tree) = new ArrayList(); - variable expected\r\n```\r\n","author":{"url":"https://github.com/EgorkaKulikov","@type":"Person","name":"EgorkaKulikov"},"datePublished":"2022-09-28T08:48:32.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/1024/UTBotJava/issues/1024"}