Scheme 48 1.7 available

Michael Sperber <>
Fri, 07 Sep 2007 13:21:02 +0200

          From comp.compilers

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Scheme 48 1.7 available (Michael Sperber) (2007-09-07)
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From: Michael Sperber <>
Newsgroups: comp.lang.scheme,comp.lang.functional,comp.compilers
Followup-To: comp.lang.scheme
Date: Fri, 07 Sep 2007 13:21:02 +0200
Organization: Compilers Central
Keywords: Scheme, available
Posted-Date: 08 Sep 2007 00:29:24 EDT

Scheme 48 is an implementation of Scheme written by Richard Kelsey and
Jonathan Rees. It is based on a byte-code interpreter and is designed
to be used as a testbed for experiments in implementation techniques
and as an expository tool. It comes with a module system, an extensive
set of libraries, an interactive command-line-based development
environment and a manual in various formats. Scheme 48 runs on most
Unix/Linux systems, as well as Windows NT, 2000, XP, and Vista, and is
fully R5RS-conformant.

Scheme 48 is available (under a very liberal license) from

Scheme 48 1.7 contains a few bug fixes, and a new experimental garbage

The Scheme 48 maintainers
A new, experimental garbage collector written by David
Frese has been added. It can be enabled by specifying
"--enable-gc=bibop" on the configure command line. (It is
disabled by default on Unix, but enabled on Windows.)
DESTDIR support has been added to the Makefile (thanks to
Markus Weissmann, Ivan Shmakov, Will Job von Foo)
Bug fixes:
Ctrl-C now works more reliably on Windows.
An I/O bug on Windows where an EOF on read would cause a
crash has been fixed. (reported by Christoph Bauer)
A bug that would cause spurious deadlocks with the
interactive REPL was fixed.
A bug where the last exception handler would get
de-installed has been fixed (reported by Emilio Lopes)
A bug in BYTES->STRING-N that would cause it to break on
incomplete incodings was fixed (reported by Emilio Lopes)
CURRENT-OS-STRING-TEXT-CODEC is now exported from
OS-STRINGS as documented (reported by Emilio Lopes)
A bug where random text would be printed when a port was
closed by GC was fixed. (reported by Will Clinger)
A bug in the UDP sockets was fixed.

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