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POC++ stl, Segmentation fault on definition
 

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  1. POC++ stl, Segmentation fault on definition
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    <p>I receive <code>Segmentation fault</code> in my code. here is gdb backtrack:</p> <pre><code>(gdb) backtrace #0 __copy_m&lt;crest::SymbolicPred* const*, crest::SymbolicPred const**&gt; (__first=&lt;optimized out&gt;, __result=&lt;optimized out&gt;, __last=&lt;optimized out&gt;) at /usr/include/c++/4.4/bits/stl_algobase.h:343 #1 __copy_move_a&lt;false, crest::SymbolicPred* const*, crest::SymbolicPred const**&gt; (__last=&lt;optimized out&gt;, __first=0x0, __result=&lt;optimized out&gt;) at /usr/include/c++/4.4/bits/stl_algobase.h:397 #2 __copy_move_a2&lt;false, __gnu_cxx::__normal_iterator&lt;crest::SymbolicPred* const*, std::vector&lt;crest::SymbolicPred*, std::allocator&lt;crest::SymbolicPred*&gt; &gt; &gt;, crest::SymbolicPred const**&gt; (__first=..., __result=&lt;optimized out&gt;, __last=...) at /usr/include/c++/4.4/bits/stl_algobase.h:436 #3 copy&lt;__gnu_cxx::__normal_iterator&lt;crest::SymbolicPred* const*, std::vector&lt;crest::SymbolicPred*, std::allocator&lt;crest::SymbolicPred*&gt; &gt; &gt;, crest::SymbolicPred const**&gt; (__first=..., __result=&lt;optimized out&gt;, __last=...) at /usr/include/c++/4.4/bits/stl_algobase.h:468 #4 uninitialized_copy&lt;__gnu_cxx::__normal_iterator&lt;crest::SymbolicPred* const*, std::vector&lt;crest::SymbolicPred*, std::allocator&lt;crest::SymbolicPred*&gt; &gt; &gt;, crest::SymbolicPred const**&gt; (__first=..., __result=&lt;optimized out&gt;, __last=...) at /usr/include/c++/4.4/bits/stl_uninitialized.h:93 #5 uninitialized_copy&lt;__gnu_cxx::__normal_iterator&lt;crest::SymbolicPred* const*, std::vector&lt;crest::SymbolicPred*, std::allocator&lt;crest::SymbolicPred*&gt; &gt; &gt;, crest::SymbolicPred const**&gt; (__first=..., __result=&lt;optimized out&gt;, __last=...) at /usr/include/c++/4.4/bits/stl_uninitialized.h:117 #6 __uninitialized_copy_a&lt;__gnu_cxx::__normal_iterator&lt;crest::SymbolicPred* const*, std::vector&lt;crest::SymbolicPred*, std::allocator&lt;crest::SymbolicPred*&gt; &gt; &gt;, crest::SymbolicPred const**, crest::SymbolicPred const*&gt; (__result=&lt;optimized out&gt;, __first=..., __last=...) at /usr/include/c++/4.4/bits/stl_uninitialized.h:257 #7 _M_range_initialize&lt;__gnu_cxx::__normal_iterator&lt;crest::SymbolicPred* const*, std::vector&lt;crest::SymbolicPred*, std::allocator&lt;crest::SymbolicPred*&gt; &gt; &gt; &gt; (__first=..., __last=..., this=&lt;optimized out&gt;) at /usr/include/c++/4.4/bits/stl_vector.h:1024 #8 _M_initialize_dispatch&lt;__gnu_cxx::__normal_iterator&lt;crest::SymbolicPred* const*, std::vector&lt;crest::SymbolicPred*, std::allocator&lt;crest::SymbolicPred*&gt; &gt; &gt; &gt; (__last=..., this=&lt;optimized out&gt;, __first=...) at /usr/include/c++/4.4/bits/stl_vector.h:1002 #9 vector&lt;__gnu_cxx::__normal_iterator&lt;crest::SymbolicPred* const*, std::vector&lt;crest::SymbolicPred*, std::allocator&lt;crest::SymbolicPred*&gt; &gt; &gt; &gt; (__a=..., __last=..., __first=..., this=&lt;optimized out&gt;) at /usr/include/c++/4.4/bits/stl_vector.h:303 #10 crest::Search::SolveAtBranch (this=0x839ef80, ex=..., branch_idx=0, input=0xbffff704) at run_crest/concolic_search.cc:325 #11 0x0807efa3 in crest::SharkSearch::makeNextInput (this=0x839ef80, input=0xbffff704) at run_crest/concolic_search.cc:1536 #12 0x080866c0 in crest::SharkSearch::Run (this=0x839ef80) at run_crest/concolic_search.cc:1418 #13 0x0807be4c in main (argc=4, argv=0xbffff834) at run_crest/run_crest.cc:64 </code></pre> <p>and here is some part of <code>SolveAtBranch</code> code:</p> <pre><code>bool Search::SolveAtBranch(const SymbolicExecution&amp; ex, size_t branch_idx, vector&lt;value_t&gt;* input) { const vector&lt;SymbolicPred*&gt;&amp; constraints = ex.path().constraints(); vector&lt;const SymbolicPred*&gt; cs(constraints.begin(), constraints.begin()+branch_idx+1); /// ... </code></pre> <p>Error line (325) is <code>vector&lt;const SymbolicPred*&gt; cs(constraints.begin(), constraints.begin()+branch_idx+1);</code> and error is occurred in a vector definition.</p> <p>When I modify the code, and compile it again, error changes and other stl definition throws error. I dont know what is the problem with this?</p>
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    1. USmrd abd
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    1. CO`constraints.begin()+branch_idx+1` possible out of range? what's value of `branch_id` and what's size of `constraints`?
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      1. POC++ stl, Segmentation fault on definition
      1. USbillz
    2. COYou corrupted your memory somewhere. You'll need to reduce your problem to a [testcase](http://sscce.org) -- in doing so, you'll probably find the fault.
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      1. POC++ stl, Segmentation fault on definition
      1. USLightness Races in Orbit
    3. CO@billz i dont think so. because 1. the error location changes in each compile and 2. the code is for a open source projects that worked correctly before modifying.
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      1. USmrd abd
 

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