https://git.ruby-lang.org/ruby.git/commit/?id=367884c659

From 367884c65912b3305d18f74b84b7c9e396d14161 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 27 Oct 2021 23:57:08 +0900
Subject: Fix yjit_asm_tests.c as C99 compliant (#5033)

* rb_bug should be variadic

* Prefer ANSI-style prototypes over old K&R-style definitions

* Add missing argument types
---
 misc/yjit_asm_tests.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/misc/yjit_asm_tests.c b/misc/yjit_asm_tests.c
index 7650505fb37..0bd11e47528 100644
--- a/misc/yjit_asm_tests.c
+++ b/misc/yjit_asm_tests.c
@@ -1,6 +1,7 @@ https://github.com/ruby/ruby/blob/trunk/misc/yjit_asm_tests.c#L1
 // For MAP_ANONYMOUS on GNU/Linux
 #define _GNU_SOURCE 1
 
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -9,9 +10,12 @@ https://github.com/ruby/ruby/blob/trunk/misc/yjit_asm_tests.c#L10
 // This test executable doesn't compile with the rest of Ruby
 // so we need to define a rb_bug().
 _Noreturn
-static void rb_bug(char *message)
+static void rb_bug(const char *message, ...)
 {
-    fprintf(stderr, "%s\n", message);
+    va_list args;
+    va_start(args, message);
+    vfprintf(stderr, message, args);
+    va_end(args);
     abort();
 }
 
@@ -71,7 +75,7 @@ void check_bytes(codeblock_t* cb, const char* bytes) https://github.com/ruby/ruby/blob/trunk/misc/yjit_asm_tests.c#L75
     }
 }
 
-void run_assembler_tests()
+void run_assembler_tests(void)
 {
     printf("Running assembler tests\n");
 
@@ -366,7 +370,7 @@ void run_assembler_tests() https://github.com/ruby/ruby/blob/trunk/misc/yjit_asm_tests.c#L370
     printf("Assembler tests done\n");
 }
 
-void assert_equal(expected, actual)
+void assert_equal(int expected, int actual)
 {
     if (expected != actual) {
         fprintf(stderr, "expected %d, got %d\n", expected, actual);
@@ -374,7 +378,7 @@ void assert_equal(expected, actual) https://github.com/ruby/ruby/blob/trunk/misc/yjit_asm_tests.c#L378
     }
 }
 
-void run_runtime_tests()
+void run_runtime_tests(void)
 {
     printf("Running runtime tests\n");
 
-- 
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