id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,difficulty 183,symbols starting with # do not have read-write invariance,Jim Ursetto,,"I noticed this because if I have a string ""#hostinfo#"" and do string->symbol on it and write it to a file, (read) on this file causes a syntax error. I am not sure, but at first glance you might fix this by changing (not (##core#inline ""C_substring_compare"" ""#!"" str 0 0 2)) to (not (##core#inline ""C_substring_compare"" ""#"" str 0 0 1)) or a more efficient equivalent in sym-is-readable? in library.scm. As far as I know, anything starting with # is sharp-syntax and is unlikely to be read as a symbol. Yes? Examples: {{{ #;> (with-input-from-string (with-output-to-string (lambda () (write (string->symbol ""#x"")))) read) Error: illegal number syntax: """" #;> (with-input-from-string (with-output-to-string (lambda () (write (string->symbol ""#hostinfo"")))) read) Error: invalid sharp-sign read syntax: #\h #;> (symbol? (with-input-from-string (with-output-to-string (lambda () (write (string->symbol ""#t"")))) read)) #f #;> (char? (with-input-from-string (with-output-to-string (lambda () (write (string->symbol ""#\\x"")))) read)) #t }}} ",defect,closed,minor,,core libraries,4.3.x,fixed,,felix winkelmann,