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I'm trying to use multiple perl interpreters within a single thread (embedding perl in C). I've tried to follow the instructions in the perlembed document (under the section Maintaining multiple interpreter instances), but I get a crash with the message "Free to wrong pool XX not YY". I'm trying to figure out if I'm doing something wrong here.

My C program and perl scripts are quite simple:

#include 
#include 

void main()
{
	PerlInterpreter *my_perl;
	PerlInterpreter *my_perl2;
	static char *embedding[] = { "", "-e", "0" };
	static char *embedding2[] = { "", "-e", "0" };

	my_perl = perl_alloc();
	my_perl2 = perl_alloc();
	PERL_SET_CONTEXT(my_perl);
	PL_perl_destruct_level = 1;
	perl_construct(my_perl);
	PERL_SET_CONTEXT(my_perl2);
	PL_perl_destruct_level = 1;
	perl_construct(my_perl2);
		

	PERL_SET_CONTEXT(my_perl);
	perl_parse(my_perl, NULL, 3, embedding, (char **)NULL);
	PERL_SET_CONTEXT(my_perl2);
	perl_parse(my_perl2, NULL, 3, embedding2, (char **)NULL);
	
	PERL_SET_CONTEXT(my_perl);
	perl_run(my_perl);
	PERL_SET_CONTEXT(my_perl2);
	perl_run(my_perl2);

	PERL_SET_CONTEXT(my_perl);
	eval_pv("do 'C:\\temp\\test.pl'", TRUE);
	printf("a = %d\n", SvIV(get_sv("a", FALSE)));
	
	eval_pv("do 'C:\\temp\\test.pl'", TRUE);
	printf("a = %d\n", SvIV(get_sv("a", FALSE)));

	PERL_SET_CONTEXT(my_perl2);
	eval_pv("do 'C:\\temp\\test.pl'", TRUE); //Crash here
	printf("b = %d\n", SvIV(get_sv("b", FALSE)));

	PERL_SET_CONTEXT(my_perl2);
	PL_perl_destruct_level = 1;
	perl_destruct(my_perl2);
	PERL_SET_CONTEXT(my_perl);
	PL_perl_destruct_level = 1;
	perl_destruct(my_perl);
	

	PERL_SET_CONTEXT(my_perl);
	perl_free(my_perl);
	PERL_SET_CONTEXT(my_perl2);
	perl_free(my_perl2);

}

test.pl:

$a += 1;

Is there something I'm doing wrong/not understanding, or have I enountered a bug?

Thanks for the help.