From c39ee489e172750a75a943e6e58e65cfc4fbd7d3 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 22 Nov 2022 18:18:30 +0900
Subject: [PATCH] Remove non formatting fprintf().

---
 mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c |  2 +-
 mrbgems/mruby-test/driver.c              |  2 +-
 src/backtrace.c                          | 14 ++++++++------
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c b/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
index ef806bdf0..505d45092 100644
--- a/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
+++ b/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
@@ -346,7 +346,7 @@ main(int argc, char **argv)
     }
   }
   else {
-    fprintf(stderr, "Output file is required\n");
+    fputs("Output file is required\n", stderr);
     return EXIT_FAILURE;
   }
   result = dump_file(mrb, wfp, args.outfile, mrb_proc_ptr(load), &args);
diff --git a/mrbgems/mruby-test/driver.c b/mrbgems/mruby-test/driver.c
index fdb7c974a..7e94df165 100644
--- a/mrbgems/mruby-test/driver.c
+++ b/mrbgems/mruby-test/driver.c
@@ -290,7 +290,7 @@ main(int argc, char **argv)
   /* new interpreter instance */
   mrb = mrb_open();
   if (mrb == NULL) {
-    fprintf(stderr, "Invalid mrb_state, exiting test driver");
+    fputs("Invalid mrb_state, exiting test driver", stderr);
     return EXIT_FAILURE;
   }
 
diff --git a/src/backtrace.c b/src/backtrace.c
index 12f835660..4a0fdc118 100644
--- a/src/backtrace.c
+++ b/src/backtrace.c
@@ -105,25 +105,27 @@ print_backtrace(mrb_state *mrb, struct RObject *exc, struct RArray *backtrace)
 
   if (n != 0) {
     if (n > 1) {
-      fprintf(stderr, "trace (most recent call last):\n");
+      fputs("trace (most recent call last):\n", stderr);
     }
     for (i=n-1,loc=&ARY_PTR(backtrace)[i]; i>0; i--,loc--) {
       if (mrb_string_p(*loc)) {
-        fprintf(stderr, "\t[%d] %.*s\n",
-                (int)i, (int)RSTRING_LEN(*loc), RSTRING_PTR(*loc));
+        fprintf(stderr, "\t[%d] ", (int)i);
+        fwrite(RSTRING_PTR(*loc), (int)RSTRING_LEN(*loc), 1, stderr);
+        fputc('\n', stderr);
       }
     }
     if (mrb_string_p(*loc)) {
-      fprintf(stderr, "%.*s: ", (int)RSTRING_LEN(*loc), RSTRING_PTR(*loc));
+      fwrite(RSTRING_PTR(*loc), (int)RSTRING_LEN(*loc), 1, stderr);
+      fputs(": ", stderr);
     }
   }
   else {
-    fprintf(stderr, "%s:0: ", "(unknown)");
+    fputs("(unknown):0: ", stderr);
   }
 
   if (exc == mrb->nomem_err) {
     static const char nomem[] = "Out of memory (NoMemoryError)\n";
-    fwrite(nomem, sizeof(nomem) - 1, 1, stderr);
+    fwrite(nomem, sizeof(nomem)-1, 1, stderr);
   }
   else {
     mesg = mrb_exc_inspect(mrb, mrb_obj_value(exc));