[Gd-chatter] [Bug 7309] New: Can't use format(%s) on subsequences

[bugzilla-daemon at gwydiondylan.org]

http://www.gwydiondylan.org/cgi-bin/bugzilla/show_bug.cgi?id=7309

           Summary: Can't use format(%s) on subsequences
           Product: common
           Version: unspecified
          Platform: Macintosh
        OS/Version: Mac OS
            Status: NEW
          Severity: normal
          Priority: P2
         Component: collection-extensions
        AssignedTo: andreas at andreas.org
        ReportedBy: lisper at jlieske.com


Though a <string> created via subsequence() works in most situations, it cannot
be passed to format() and printed with %s.  

The following code fails:

let string = "Demonstration of Subsequence bug";
format(*standard-output*, "The full string is \"%s\"\n", string);
force-output(*standard-output*);
let sub = subsequence(string, start: 17, end: 28);
format(*standard-output*, "The substring is the third word.\n");
force-output(*standard-output*);
format(*standard-output*, "The next line will use %%= to print the
substring:\n");
force-output(*standard-output*);
format(*standard-output*, "\"%=\"\n", sub);
force-output(*standard-output*);
format(*standard-output*, "The next line will use %%s to print the
substring:\n");
force-output(*standard-output*);
format(*standard-output*, "\"%s\"\n", sub);
force-output(*standard-output*);


The output is

The full string is "Demonstration of Subsequence bug"
The substring is the third word.
The next line will use %= to print the substring:
"{<vs-subsequence>: 'S', 'u', 'b', 's', 'e', 'q', 'u', 'e', 'n', 'c', 'e'}"
The next line will use %s to print the substring:
"Application does not hold stream's buffer -- {<fd-stream> instance at
0x42fd60}.
Abort


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