https://git.ruby-lang.org/ruby.git/commit/?id=30ded41fc3

From 30ded41fc3237f83470d0f6b64103f18bc92a78d Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 2 Dec 2020 16:16:27 +0900
Subject: Loaded script is unset yet when crashed in the initialization phase


diff --git a/vm_dump.c b/vm_dump.c
index 15b1b4a..6548a70 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -972,9 +972,11 @@ rb_vm_bugreport(const void *ctx) https://github.com/ruby/ruby/blob/trunk/vm_dump.c#L972
 	(((len = RSTRING_LEN(s)) > max_name_length) ? max_name_length : (int)len)
 
 	name = vm->progname;
-	fprintf(stderr, "* Loaded script: %.*s\n",
-		LIMITED_NAME_LENGTH(name), RSTRING_PTR(name));
-	fprintf(stderr, "\n");
+        if (name) {
+	    fprintf(stderr, "* Loaded script: %.*s\n",
+		    LIMITED_NAME_LENGTH(name), RSTRING_PTR(name));
+	    fprintf(stderr, "\n");
+        }
 	fprintf(stderr, "* Loaded features:\n\n");
 	for (i=0; i<RARRAY_LEN(vm->loaded_features); i++) {
 	    name = RARRAY_AREF(vm->loaded_features, i);
-- 
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