https://git.ruby-lang.org/ruby.git/commit/?id=812a438145

From 812a438145a604e1361d4bf07cc3d81452cfb0ec Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 29 Apr 2019 11:31:18 +0900
Subject: iseq.c: removed unnecessary zero-fills


diff --git a/iseq.c b/iseq.c
index adf4b07..ac5476d 100644
--- a/iseq.c
+++ b/iseq.c
@@ -2183,9 +2183,10 @@ rb_iseq_disasm_recursive(const rb_iseq_t *iseq, VALUE indent) https://github.com/ruby/ruby/blob/trunk/iseq.c#L2183
 	    int li = body->local_table_size - --i - 1;
 	    long width;
 	    VALUE name = local_var_name(iseq, 0, i);
-	    char argi[0x100] = "";
-	    char opti[0x100] = "";
+            char argi[0x100];
+            char opti[0x100];
 
+            opti[0] = '\0';
 	    if (body->param.flags.has_opt) {
 		int argc = body->param.lead_num;
 		int opts = body->param.opt_num;
-- 
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