导入Ballerina OpenAPI连接器时遭遇编译空指针错误求助

我是Ballerina新手，尝试导入ballerinax/fraudlabspro.frauddetection这类OpenAPI连接器到项目时，持续遭遇编译错误。报错核心信息为NullPointerException：Cannot read field "flags" because "type.tsymbol" is null，完整报错日志如下：

Compiling source
        admin/test2:0.1.0
ballerina: Oh no, something really went wrong. Bad. Sad.

We appreciate it if you can report the code that broke Ballerina in
https://github.com/ballerina-platform/ballerina-lang/issues with the
log you get below and your sample code.

We thank you for helping make us better.

[2023-11-08 07:48:35,043] SEVERE {b7a.log.crash} - Cannot read field "flags" because "type.tsymbol" is null
java.lang.NullPointerException: Cannot read field "flags" because "type.tsymbol" is null
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:2709)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:280)
        at org.wso2.ballerinalang.compiler.tree.expressions.BLangTypeInit.accept(BLangTypeInit.java:70)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.analyzeExpr(CodeAnalyzer.java:3514)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:3196)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:280)
        at org.wso2.ballerinalang.compiler.tree.expressions.BLangCheckedExpr.accept(BLangCheckedExpr.java:70)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.analyzeExpr(CodeAnalyzer.java:3514)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:1717)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:280)
        at org.wso2.ballerinalang.compiler.tree.BLangSimpleVariable.accept(BLangSimpleVariable.java:59)
        at org.wso2.ballerinalang.compiler.tree.SimpleBLangNodeAnalyzer.visitNode(SimpleBLangNodeAnalyzer.java:215)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.analyzeNode(CodeAnalyzer.java:349)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:1834)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:280)
        at org.wso2.ballerinalang.compiler.tree.statements.BLangSimpleVariableDef.accept(BLangSimpleVariableDef.java:55)
        at org.wso2.ballerinalang.compiler.tree.SimpleBLangNodeAnalyzer.visitNode(SimpleBLangNodeAnalyzer.java:215)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.analyzeNode(CodeAnalyzer.java:349)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:538)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:280)
        at org.wso2.ballerinalang.compiler.tree.BLangBlockFunctionBody.accept(BLangBlockFunctionBody.java:65)
        at org.wso2.ballerinalang.compiler.tree.SimpleBLangNodeAnalyzer.visitNode(SimpleBLangNodeAnalyzer.java:215)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.analyzeNode(CodeAnalyzer.java:349)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visitFunction(CodeAnalyzer.java:513)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:456)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:280)
        at org.wso2.ballerinalang.compiler.tree.BLangFunction.accept(BLangFunction.java:81)
        at org.wso2.ballerinalang.compiler.tree.SimpleBLangNodeAnalyzer.visitNode(SimpleBLangNodeAnalyzer.java:215)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.analyzeNode(CodeAnalyzer.java:349)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.analyzeTopLevelNodes(CodeAnalyzer.java:338)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:326)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.visit(CodeAnalyzer.java:280)
        at org.wso2.ballerinalang.compiler.tree.BLangPackage.accept(BLangPackage.java:172)
        at org.wso2.ballerinalang.compiler.tree.SimpleBLangNodeAnalyzer.visitNode(SimpleBLangNodeAnalyzer.java:215)
        at org.wso2.ballerinalang.compiler.semantics.analyzer.CodeAnalyzer.analyze(CodeAnalyzer.java:314)
        at io.ballerina.projects.internal.CompilerPhaseRunner.codeAnalyze(CompilerPhaseRunner.java:196)
        at io.ballerina.projects.internal.CompilerPhaseRunner.performTypeCheckPhases(CompilerPhaseRunner.java:119)
        at io.ballerina.projects.ModuleContext.compileInternal(ModuleContext.java:435)
        at io.ballerina.projects.ModuleCompilationState$1.compile(ModuleCompilationState.java:45)
        at io.ballerina.projects.ModuleContext.compile(ModuleContext.java:383)
        at io.ballerina.projects.PackageCompilation.compileModulesInternal(PackageCompilation.java:208)
        at io.ballerina.projects.PackageCompilation.compileModules(PackageCompilation.java:192)
        at io.ballerina.projects.PackageCompilation.compile(PackageCompilation.java:99)
        at io.ballerina.projects.PackageCompilation.from(PackageCompilation.java:94)
        at io.ballerina.projects.PackageContext.getPackageCompilation(PackageContext.java:242)
        at io.ballerina.projects.Package.getCompilation(Package.java:150)
        at io.ballerina.projects.Package.runCodeGeneratorPlugins(Package.java:319)
        at io.ballerina.cli.task.CompileTask.execute(CompileTask.java:142)
        at io.ballerina.cli.TaskExecutor.executeTasks(TaskExecutor.java:40)
        at io.ballerina.cli.cmd.RunCommand.execute(RunCommand.java:223)
        at java.base/java.util.Optional.ifPresent(Optional.java:178)
        at io.ballerina.cli.launcher.Main.main(Main.java:58)

ERROR [test2:(1:1,1:1)] Compilation failed due to: Cannot read field "flags" because "type.tsymbol" is null
error: compilation contains errors

我查阅了官方文档及GitHub相关内容，仍无法定位问题根源，希望能得到帮助。以下是我的main.bal代码：

import ballerina/io;
import ballerinax/fraudlabspro.frauddetection as ff;

public function main() {
    io:println("Hello, World!");
    ff:Client baseClient = check new Client();
}

可能的解决方向 #

• 检查版本兼容性：确认当前使用的Ballerina版本与ballerinax/fraudlabspro.frauddetection连接器的支持版本匹配，部分旧版编译器对OpenAPI生成的连接器存在解析缺陷。
• 清理并重新构建：执行ballerina clean清理本地依赖缓存，再运行ballerina build重新拉取依赖并编译，排除缓存损坏导致的问题。
• 简化代码排查：先注释掉客户端初始化代码，仅保留导入语句编译，确认是否是导入环节出错；再逐步添加初始化逻辑，定位触发错误的具体代码。
• 检查连接器定义：如果是自行生成的连接器，验证对应的OpenAPI规范是否存在语法问题，尝试重新生成连接器代码。

内容的提问来源于stack exchange，提问作者ooi18