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“NullPointerException”The number passed in the api is formatStackTrace is a null pointer. #2784

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Cici-Musse-Lee opened this issue May 31, 2022 · 0 comments

Cici-Musse-Lee commented May 31, 2022

The file path is org.zkoss.lang.Exceptions
"java.lang.Throwable.printStackTrace(java.io.PrintWriter)"because "t"is null
source code：

public static final StringBuffer formatstackTrace(StringBuffer sb,Throwable t,String prefix,int maxcnt){
        final stringWriter sw new stringWriter();
        t.printstackTrace(new Printwriter(sw));
        final stringBuffer trace sw.getBuffer();
}

test code：

public void test_formatStackTrace_5_80()throws NoSuchFieldException,IllegalAccessException{
        java.lang.Throwable throwable0 null;
        java.lang.String string1 ="ftp://fhBD.wOJdSb.L.H63.4Hh.UxcBz.oGNV";
        org.zkoss.lang.Exceptions.formatstackTrace(throwable0,string1);
}

test result:

java.lang.NullPointerException:Cannot invoke "java.lang.Throwable.printStackTrace(java.io.PrintWriter)"because "t"is null
at org.zkoss.lang.Exceptions.formatStackTrace(Exceptions.java:418)
at org.zkoss.lang.Exceptions.formatStackTrace(Exceptions.java:400)
at org.zkoss.lang.Exceptions.formatStackTrace(Exceptions.java:390)

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