Add source position recording for variable loads

test/message/regress/regress-1527.out

Index: test/message/regress/regress-1527.out
diff --git a/test/message/regress/regress-1527.out b/test/message/regress/regress-1527.out
new file mode 100644
index 0000000000000000000000000000000000000000..55ffabff1827eb41fe27400cce44b11eecbe9557
--- /dev/null
+++ b/test/message/regress/regress-1527.out
@@ -0,0 +1,32 @@
+# Copyright 2008 the V8 project authors. All rights reserved.

[Kevin Millikin (Chromium), 2011/07/11 15:11:08]

Cut and paste a different copyright header :)

[Søren Thygesen Gjesse, 2011/07/11 15:19:16]

Done.

+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*%(basename)s:32: ReferenceError: foo is not defined
+  3: foo
+     ^
+ReferenceError: foo is not defined
+    at *%(basename)s:32:6