This patch against zlib-1.2.3 adds a note to the documentation of gzerror() in zlib.h specifying the rules for access to the error text returned:
--- zlib-1.2.3/zlib.h.orig 2006-02-18 08:37:38.000000000 +0000
+++ zlib-1.2.3/zlib.h 2006-02-18 08:40:28.000000000 +0000
@@ -1240,6 +1240,9 @@
error occurred in the file system and not in the compression library,
errnum is set to Z_ERRNO and the application may consult errno
to get the exact error code.
+
+ The application must not modify the returned string and future calls to
+ this function may invalidate the returned string.
*/
ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
--
"You grabbed my hand and we fell into it, like a daydream - or a fever."
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