07-05-2012
No.
Your code has done pointer arithmetic on the pointer object you are trying to free.
malloc() keeps data about the pointer adjacent to the actual place in memory the pointer references at the start, so free() thinks it has to work on memory the process does nto own. Boom.
Use Electric Fence or valgrind to find where. These are available for a lot of platforms.
Failing that look at driver's code here:
memory stack problem
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LEARN ABOUT MOJAVE
curl_getenv
curl_getenv(3) libcurl Manual curl_getenv(3)
NAME
curl_getenv - return value for environment name
SYNOPSIS
#include <curl/curl.h>
char *curl_getenv(const char *name);
DESCRIPTION
curl_getenv() is a portable wrapper for the getenv() function, meant to emulate its behaviour and provide an identical interface for all
operating systems libcurl builds on (including win32).
AVAILABILITY
This function will be removed from the public libcurl API in a near future. It will instead be made "available" by source code access only,
and then as curlx_getenv().
RETURN VALUE
If successful, curl_getenv() returns a pointer to the value of the specified environment. The memory it refers to is malloc()ed so the
application must free() this when the data is no longer needed. When curl_getenv(3) fails to find the specified name, it returns a null
pointer.
NOTE
Under unix operating systems, there isn't any point in returning an allocated memory, although other systems won't work properly if this
isn't done. The unix implementation thus has to suffer slightly from the drawbacks of other systems.
SEE ALSO
getenv(3C),
libcurl 7.54.0 February 03, 2016 curl_getenv(3)