res = xbt_new0(s_xbt_context_t,1);
- xbt_assert0(getcontext(&(res->uc))==0,"Error in context saving.");
+ /* FIXME: strerror is not thread safe */
+ xbt_assert2(getcontext(&(res->uc))==0,"Error in context saving: %d (%s)", errno, strerror(errno));
res->code = code;
res->uc.uc_link = NULL;