exception__env    213 contrib/visupng/cexcept.h     jmp_buf *exception__prev, exception__env; \
exception__env    215 contrib/visupng/cexcept.h     the_exception_context->penv = &exception__env; \
exception__env    216 contrib/visupng/cexcept.h     if (setjmp(exception__env) == 0) { \