- smx_process_t _smx_throw_issuer = (issuer); \
- THROW_PREPARE(_smx_throw_issuer->running_ctx, (c), (v), xbt_strdup(m)); \
+ smx_process_t _smx_throw_issuer = (issuer); /* evaluate only once */\
+ THROW_PREPARE(_smx_throw_issuer->running_ctx, (cat), (val), xbt_strdup(msg)); \