compile.c: fix load_from_binary

* compile.c (ibf_load_iseq_each): realpath may be nil.  follow up
  r59709.  [fix https://github.com/Shopify/bootsnap/issues/132]

From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62772 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 1 deletions

diff --git a/compile.c b/compile.c
index 17974b26c0..18abaca22b 100644
--- a/compile.c
+++ b/compile.c
@@ -8773,7 +8773,15 @@ ibf_load_iseq_each(const struct ibf_load *load, rb_iseq_t *iseq, ibf_offset_t of
 		rb_raise(rb_eRuntimeError, "path object size mismatch");
 	    }
 	    path = rb_fstring(RARRAY_AREF(pathobj, 0));
-	    realpath = rb_fstring(RARRAY_AREF(pathobj, 1));
+	    realpath = RARRAY_AREF(pathobj, 1);
+	    if (!NIL_P(realpath)) {
+		if (!RB_TYPE_P(realpath, T_STRING)) {
+		    rb_raise(rb_eArgError, "unexpected realpath %"PRIxVALUE
+			     "(%x), path=%+"PRIsVALUE,
+			     realpath, TYPE(realpath), path);
+		}
+		realpath = rb_fstring(realpath);
+	    }
 	}
 	else {
 	    rb_raise(rb_eRuntimeError, "unexpected path object");