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From: | Bruce Korb |
Subject: | Re: Guile BUG: What's wrong with this? |
Date: | Fri, 06 Jan 2012 14:23:54 -0800 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:9.0) Gecko/20111220 Thunderbird/9.0 |
scm_from_locale_stringn() makes an optimization when the length is zero. It returns an immutable string of length zero. For reasons I no longer remember, I had my own ag_scm_string_upcase that called scm_string_upcase_x, presuming that scm_from_locale_stringn had returned a writable string. Two possible fixes: 1. remove the "optimization" 2. check the length in scm_string_upcase_x before choking. The reason for the seg fault is that scm_backtrace() faulted. I called it in the on_exit path and it couldn't cope.
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