Disabling some simplifications that interact badly with GC. Based on error report from Alan Watson.  Revisit this later.
Disabling some simplifications that interact badly with GC.
Based on error report from Alan Watson.  Revisit this later.

holmescn/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme