Throwing exception 'std::__ios_failure' when running simple example

[HordChurtle]

I am using the following code in eclipse using g++ as the compiler. The code compiles, but I get a runtime error.

#include
#include "rapidcsv.h"

using namespace std;

int main() {

rapidcsv::Document doc("colhdr.csv");

cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
return 0;

}

terminate called after throwing an instance of 'std::__ios_failure'
what(): basic_ios::clear: iostream error

[d99kris]

Hi @HordChurtle - the issue is most likely that the file colhdr.csv does not exist in current working directory. Let's say the source file is named ex001.cpp, then one can check the source of the exception with:

$ g++ -g -Isrc ex001.cpp
$ gdb a.out
(gdb) b __cxa_throw
(gdb) r
Breakpoint 1, 0x0000007ff7e326bc in __cxa_throw () from /lib/aarch64-linux-gnu/libstdc++.so.6
(gdb) bt
#0  0x0000007ff7e326bc in __cxa_throw () from /lib/aarch64-linux-gnu/libstdc++.so.6
#1  0x0000007ff7e2e41c in std::__throw_ios_failure(char const*) () from /lib/aarch64-linux-gnu/libstdc++.so.6
#2  0x0000007ff7e9db08 in std::basic_ios<char, std::char_traits<char> >::clear(std::_Ios_Iostate) ()
   from /lib/aarch64-linux-gnu/libstdc++.so.6
#3  0x0000005555554cb8 in rapidcsv::Document::ReadCsv (this=0x7ffffff690) at src/rapidcsv.h:1486
#4  0x0000005555554a9c in rapidcsv::Document::Document (this=0x7ffffff690, pPath="colhdr.csv", pLabelParams=..., 
    pSeparatorParams=..., pConverterParams=..., pLineReaderParams=...) at src/rapidcsv.h:486
#5  0x0000005555553c3c in main () at ex001.cpp:14

The code in frame #3 src/rapidcsv.h:1486 is:

stream.open(mPath, std::ios::binary);

Thus the exception was thrown when attempting to open the file.

To fix this, one can either make sure colhdr.csv exists in the current working dir, or try specifying the absolute path to the file.

[d99kris]

I will proceed to close this discussion for now, feel free to re-open it for any follow-up questions.