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			     BASH PATCH REPORT
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			     =================
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Bash-Release:	4.2
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Patch-ID:	bash42-028
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Bug-Reported-by:	Mark Edgar <medgar123@gmail.com>
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Bug-Reference-ID:	<CABHMh_3d+ZgO_zaEtYXPwK4P7tC0ghZ4g=Ue_TRpsEMf5YDsqw@mail.gmail.com>
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Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2012-03/msg00109.html
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Bug-Description:
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When using a word expansion for which the right hand side is evaluated,
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certain expansions of quoted null strings include spurious ^? characters.
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Patch (apply with `patch -p0'):
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*** ../bash-4.2-patched/subst.c	2012-03-11 17:35:13.000000000 -0400
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--- subst.c	2012-03-20 19:30:13.000000000 -0400
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***************
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*** 5810,5813 ****
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--- 5810,5823 ----
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        if (qdollaratp && ((hasdol && quoted) || l->next))
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  	*qdollaratp = 1;
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+       /* If we have a quoted null result (QUOTED_NULL(temp)) and the word is
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+ 	 a quoted null (l->next == 0 && QUOTED_NULL(l->word->word)), the
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+ 	 flags indicate it (l->word->flags & W_HASQUOTEDNULL), and the
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+ 	 expansion is quoted (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
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+ 	 (which is more paranoia than anything else), we need to return the
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+ 	 quoted null string and set the flags to indicate it. */
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+       if (l->next == 0 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL(temp) && QUOTED_NULL(l->word->word) && (l->word->flags & W_HASQUOTEDNULL))
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+ 	{
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+ 	  w->flags |= W_HASQUOTEDNULL;
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+ 	}
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        dispose_words (l);
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      }
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*** ../bash-4.2-patched/patchlevel.h	Sat Jun 12 20:14:48 2010
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--- patchlevel.h	Thu Feb 24 21:41:34 2011
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***************
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*** 26,30 ****
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     looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 27
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  #endif /* _PATCHLEVEL_H_ */
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--- 26,30 ----
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     looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 28
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  #endif /* _PATCHLEVEL_H_ */