// commit 9543656cc32fda48fc463f332ee20e91eed2b768 2016-03-06

// __putenv could be confused into freeing storage that does not belong to the implementation

#define _XOPEN_SOURCE 700

#include <stdlib.h>

#include <string.h>

int main(void)

{

	setenv("A", "1", 1);

	setenv("A", "2", 1);

	char *c = strdup("A=3");

	putenv(c);

	setenv("A", "4", 1);

	free(c);

	return 0;

}