From dad2abc69fdd1af52df353b8604017bd6a5c6a99 Mon Sep 17 00:00:00 2001
From: Koichi Sasada <ko1@atdot.net>
Date: Fri, 8 Nov 2019 10:02:21 +0900
Subject: [PATCH] do not use __func__.

Microsoft Visual Studio 12.0 doesn't support it.
---
 compile.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/compile.c b/compile.c
index 9735c50710..08a7576af2 100644
--- a/compile.c
+++ b/compile.c
@@ -9769,9 +9769,9 @@ ibf_load_builtin(const struct ibf_load *load, ibf_offset_t *offset)
     }
 
     const struct rb_builtin_function *table = GET_VM()->builtin_function_table;
-    if (table == NULL) rb_bug(__func__);
+    if (table == NULL) rb_bug("ibf_load_builtin: table is not provided.");
     if (strncmp(table[i].name, name, len) != 0) {
-        rb_bug("%s mistach", __func__);
+        rb_bug("ibf_load_builtin: index (%d) mismatch (expect %s but %s).", i, name, table[i].name);
     }
     // fprintf(stderr, "load-builtin: name:%s(%d)\n", table[i].name, table[i].argc);