if (backtrace == null) { initBacktrace(); } return backtrace;
if (threadGroup == null) { return getRuntime().getNil(); } return threadGroup;
Clone fragments detected by clone detection tool
File path: /jruby-1.4.0/src/org/jruby/RubyException.java File path: /jruby-1.4.0/src/org/jruby/RubyThread.java
Method name: IRubyObject getBacktrace() Method name: IRubyObject group()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (backtrace == null) {
1
if (threadGroup == null) {
2
            initBacktrace();
2
        	return getRuntime().getNil();
3
        }
3
        }
4
        return backtrace
4
        
5
;
5
        return threadGroup;
Summary
Number of common nesting structure subtrees1
Number of refactorable cases0
Number of non-refactorable cases1
Time elapsed for finding largest common nesting structure subtrees (ms)0.1
Clones locationClones are in different classes having the same super class
Number of node comparisons5
  1. {Non-refactorable}
    Mapping Summary
    Number of mapped statements1
    Number of unmapped statements in the first code fragment2
    Number of unmapped statements in the second code fragment2
    Time elapsed for statement mapping (ms)0.4
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (backtrace == null)
    1
    if (backtrace == null)
    1
    if (threadGroup == null)
    Differences
    Expression1Expression2Difference
    backtracethreadGroupVARIABLE_NAME_MISMATCH
    org.jruby.runtime.builtin.IRubyObjectorg.jruby.RubyThreadGroupVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type org.jruby.runtime.builtin.IRubyObject of variable backtrace does not match with type org.jruby.RubyThreadGroup of variable threadGroup
    • Make classes org.jruby.runtime.builtin.IRubyObject and org.jruby.RubyThreadGroup extend a common superclass
    1
    if (threadGroup == null)
                                                                    
    2
    return getRuntime().getNil();
    Preondition Violations
    Unmatched return getRuntime().getNil();
    2
    return getRuntime().getNil();
    2
    initBacktrace();
                                          
                                                
    3
    return threadGroup;
    Preondition Violations
    Unmatched return threadGroup;
    3
    return threadGroup;
    3
    return backtrace;
    3
    return backtrace;
    Preondition Violations
    Unmatched return backtrace;
                                            
    Precondition Violations (4)
    Row Violation
    1Type org.jruby.runtime.builtin.IRubyObject of variable backtrace does not match with type org.jruby.RubyThreadGroup of variable threadGroup
    2Unmatched return getRuntime().getNil();
    3Unmatched return threadGroup;
    4Unmatched return backtrace;