I am a newbie in Ballerina, and I am trying to import some OpenAPI Connector (For example ballerinax / fraudlabspro.frauddetection) into my Ballerina project. However I keep facing the error as stated at below:
Compiling source
admin/test2:0.1.0
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[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
I have try dig up on the documentation and also GitHub, but no clue on what exact is this error about. Can someone help me on this?
Below is the code from my main.bal:
import ballerina/io;
import ballerinax/fraudlabspro.frauddetection as ff;
public function main() {
io:println("Hello, World!");
ff:Client baseClient = check new Client();
}
Can you please change the code as follows?
import ballerina/io;
import ballerinax/fraudlabspro.frauddetection as ff;
public function main() returns error? {
io:println("Hello, World!");
ff:Client baseClient = check new ff:Client();
}
You need to change the return type of the main function to error? because you use the check expression. When creating the ff:Client object, you cannot omit ff: prefix. The reason is explained in https://github.com/ballerina-platform/ballerina-lang/issues/41474#issuecomment-1780670293.