Revert r62617 "compile.c: fix load_from_binary"

It breaks Solaris:
http://rubyci.s3.amazonaws.com/unstable11s/ruby-trunk/log/20180301T012502Z.diff.html.gz

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62769 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 6 insertions, 6 deletions

diff --git a/compile.c b/compile.c
index 2c388b8a8c..17974b26c0 100644
--- a/compile.c
+++ b/compile.c
@@ -8773,8 +8773,7 @@ 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 = RARRAY_AREF(pathobj, 1);
-	    if (!NIL_P(realpath)) realpath = rb_fstring(realpath);
+	    realpath = rb_fstring(RARRAY_AREF(pathobj, 1));
 	}
 	else {
 	    rb_raise(rb_eRuntimeError, "unexpected path object");
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 1a45778cc4..4c811611ba 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -398,9 +398,10 @@ class TestISeq < Test::Unit::TestCase
 
   def test_to_binary_with_objects
     code = "[]"+100.times.map{|i|"<</#{i}/"}.join
-    iseq = RubyVM::InstructionSequence.compile(code)
-    bin = assert_nothing_raised {iseq.to_binary}
-    iseq2 = RubyVM::InstructionSequence.load_from_binary(bin)
-    assert_equal(iseq2.to_a, iseq.to_a)
+    bin = assert_nothing_raised {
+      RubyVM::InstructionSequence.compile(code).to_binary
+    }
+    # load_from_binary doesn't work now
+    assert_instance_of(String, bin)
   end
 end