Avoid use of `snprintf()` when DISABLE_STDIO is set; fix #3632

ref #3492 #3515 #3517

1 files changed, 7 insertions, 4 deletions

diff --git a/mrbgems/mruby-eval/src/eval.c b/mrbgems/mruby-eval/src/eval.c
index 00cb2f15c..54a6aab2e 100644
--- a/mrbgems/mruby-eval/src/eval.c
+++ b/mrbgems/mruby-eval/src/eval.c
@@ -4,6 +4,7 @@
 #include <mruby/irep.h>
 #include <mruby/proc.h>
 #include <mruby/opcode.h>
+#include <mruby/error.h>
 
 mrb_value mrb_exec_irep(mrb_state *mrb, mrb_value self, struct RProc *p);
 mrb_value mrb_obj_instance_eval(mrb_state *mrb, mrb_value self);
@@ -175,12 +176,14 @@ create_proc_from_string(mrb_state *mrb, char *s, int len, mrb_value binding, con
 
   if (0 < p->nerr) {
     /* parse error */
-    char buf[256];
-    int n;
-    n = snprintf(buf, sizeof(buf), "line %d: %s\n", p->error_buffer[0].lineno, p->error_buffer[0].message);
+    mrb_value str;
+
+    str = mrb_format(mrb, "line %S: %S",
+                     mrb_fixnum_value(p->error_buffer[0].lineno),
+                     mrb_str_new_cstr(mrb, p->error_buffer[0].message));
     mrb_parser_free(p);
     mrbc_context_free(mrb, cxt);
-    mrb_exc_raise(mrb, mrb_exc_new(mrb, E_SYNTAX_ERROR, buf, n));
+    mrb_exc_raise(mrb, mrb_exc_new_str(mrb, E_SYNTAX_ERROR, str));
   }
 
   proc = mrb_generate_code(mrb, p);