#1811: [r7rs] 'environment' wrongly imports all symbols from r7rs module

[Chicken Trac]

#1811: [r7rs] 'environment' wrongly imports all symbols from r7rs module
--------------------------------+------------------------
            Reporter:  rgherdt  |       Type:  defect
              Status:  new      |   Priority:  major
           Milestone:  someday  |  Component:  extensions
             Version:  5.3.0    |   Keywords:
Estimated difficulty:           |
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 The procedure `environment` from (scheme eval) imports all symbols from
 `r7rs` by default, leading to a wrong behavior:


 {{{
 (import (scheme eval))
 (eval '(+ 1 3) (environment '(except (scheme base) +)))
 .
 .
 .
 4
 }}}

 The expected behavior is an "unbound variable: +" error.

 I'll upload a patch (thanks Felix).

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Ticket URL: <https://bugs.call-cc.org/ticket/1811>
CHICKEN Scheme <https://www.call-cc.org/>
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