parse.y: NUL-terminate ruby_sourcefile

* parse.y (yycompile): in some cases (warning, error, dtrace,...),
  ruby_sourcefile is expected to be NUL-terminated, so ensure it.

* template/prelude.c.tmpl (prelude_name): NUL-terminate to get rid
  of copying static data.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62841 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/parse.y b/parse.y
index eb9c00d72b..b85637f0ae 100644
--- a/parse.y
+++ b/parse.y
@@ -4889,7 +4889,7 @@ yycompile(VALUE vparser, struct parser_params *p, VALUE fname, int line)
 {
     rb_ast_t *ast;
     p->ruby_sourcefile_string = rb_str_new_frozen(fname);
-    p->ruby_sourcefile = RSTRING_PTR(fname);
+    p->ruby_sourcefile = StringValueCStr(fname);
     p->ruby_sourceline = line - 1;
 
     p->ast = ast = rb_ast_new();