from the memoization part of the file.
(copy_tree): New static function
(scm_copy_tree): Rewritten to fix two kinds or bugs: First, cyclic
structures are detected now and will lead to an exception instead
of forcing guile to run in an endless loop, using up all the
system's memory. Second, arrays in the cdr of an improper list
are now copied. See the new test cases in eval.test.
* test-suite/tests/eval.test: Added tests which reflect the recent
fixes to copy-tree.
* tests/dynamic-scope.test, tests/eval.test,
tests/r5rs_pitfall.test, tests/srfi-17.test, tests/syncase.test:
Wrap tests in module (test-suite test-<file-name without .test>),
following a practice that was used on a couple of files already.
* tests/dynamic-scope.test (exception:duplicate-binding,
exception:bad-binding): New.
* tests/dynamic-scope.test, tests/srfi-17.test, tests/syntax.test:
Execute syntactically wrong tests using eval. With the upcoming
new memoizer this is necessary in order to postpone the syntax
check to the actual evaluation of the syntactically wrong form.
* tests/syntax.test: Added some test cases and modified one test
case.
