@@ -71,16 +71,16 @@ static void tracehook(struct cli_bc_ctx *ctx, unsigned event)

 	return;

     switch (event) {

 	case trace_func:

-	    printf("[trace] %s:%u:%u -> %s:%u:%u Entered function %s\n",

+	    fprintf(stderr, "[trace] %s:%u:%u -> %s:%u:%u Entered function %s\n",

 		   dbg_state.file, dbg_state.line, dbg_state.col,

 		   ctx->file, ctx->line, ctx->col, ctx->scope);

 	    dbg_state.scope = ctx->scope;

 	    break;

 	case trace_param:

-	    printf("[trace] function parameter:\n");

+	    fprintf(stderr, "[trace] function parameter:\n");

 	    return;

 	case trace_scope:

-	    printf("[trace] %s:%u:%u -> %s:%u:%u\n",

+	    fprintf(stderr, "[trace] %s:%u:%u -> %s:%u:%u\n",

 		   dbg_state.file, dbg_state.line, dbg_state.col,

 		   ctx->file, ctx->line, ctx->col);

 	    dbg_state.scope = ctx->scope;

@@ -90,7 +90,7 @@ static void tracehook(struct cli_bc_ctx *ctx, unsigned event)

 	    if (dbg_state.showline)

 		cli_bytecode_debug_printsrc(ctx);

 	    else

-		printf("[trace] %s:%u:%u\n",

+		fprintf(stderr, "[trace] %s:%u:%u\n",

 		       dbg_state.file, dbg_state.line, dbg_state.col);

 	    break;

 	default:

@@ -103,12 +103,12 @@ static void tracehook(struct cli_bc_ctx *ctx, unsigned event)

 static void tracehook_op(struct cli_bc_ctx *ctx, const char *op)

 {

-    printf("[trace] %s\n", op);

+    fprintf(stderr, "[trace] %s\n", op);

 }

 static void tracehook_val(struct cli_bc_ctx *ctx, const char *name, uint32_t value)

 {

-    printf("[trace] %s = %u\n", name, value);

+    fprintf(stderr, "[trace] %s = %u\n", name, value);

 }

 int main(int argc, char *argv[])