From bcc9b2264e648d77eadab451724661d01fe0af14 Mon Sep 17 00:00:00 2001
From: Matthew Flatt <mflatt@racket-lang.org>
Date: Thu, 3 Jan 2019 10:24:05 -0700
Subject: [PATCH] improve reporting of primitive-count startup error

---
 racket/src/racket/src/env.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/racket/src/racket/src/env.c b/racket/src/racket/src/env.c
index d947fe7020..b64626c36c 100644
--- a/racket/src/racket/src/env.c
+++ b/racket/src/racket/src/env.c
@@ -347,9 +347,10 @@ static void init_startup_env(void)
   
 #if USE_COMPILED_STARTUP
   if (builtin_ref_counter != EXPECTED_PRIM_COUNT) {
-    printf("Primitive count %d doesn't match expected count %d\n"
-	   "Turn off USE_COMPILED_STARTUP in src/schminc.h\n",
-	   builtin_ref_counter, EXPECTED_PRIM_COUNT);
+    fprintf(stderr,
+            "Primitive count %d doesn't match expected count %d\n"
+            "Update the count in src/schminc.h and bump the version in src/schvers.h\n",
+            builtin_ref_counter, EXPECTED_PRIM_COUNT);
     abort();
   }
 #endif