Update scrypt_common.cc

[bryonglodencissp]

[src/node-boilerplate/scrypt_common.cc:98]: (error) Dangerous usage of c_str(). The value returned by c_str() is invalid after this call.

What happened in the original version of this code was:

1. instance of std::string is created - it is an object with automatic storage duration
2. pointer to the internal memory of this string is returned
3. object scrypt_err_description is destructed and its' internal memory is cleaned up
4. the caller of this function receives a dangling pointer (invalid pointer) which yields undefined behavior

The best solution: return an object and call .c_str() on the returned value.

REF: http://stackoverflow.com/questions/22330250/how-to-return-a-stdstring-c-str: How to return a std::string.c_str()

Found by https://github.com/bryongloden/cppcheck

[BrandonZacharie]

I think this may fix #131

[barrysteyn]

I'll look into this shortly...

On Aug 16, 2016 10:36 PM, "Brandon Zacharie" [email protected]
wrote:

I think this may fix #131
#131

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