Re: regression in "$*" expansion

[Peter Stephenson <Peter.Stephenson@xxxxxxx>]

On Mon, 27 Feb 2012 20:24:56 +0000
Stephane Chazelas <stephane_chazelas@xxxxxxxx> wrote:
> $ ARGV0=sh zsh -c 'IFS=; print -rl "$*"' x a b c
> a
> b
> c
> 
> (instead of expected "abc").

I don't really understand the nojoin flag (in the sense of "I never
really understood string theory") but it shouldn't be doing anything
related to SHWORDSPLIT within quotes, unless we're explicitly using (@)
or $@ which we haven't tested at this point.  So I think the fix is
just this local change.

Index: Src/subst.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/subst.c,v
retrieving revision 1.132
diff -p -u -r1.132 subst.c
--- Src/subst.c	20 Feb 2012 17:50:40 -0000	1.132
+++ Src/subst.c	28 Feb 2012 10:23:11 -0000
@@ -1649,7 +1649,7 @@ paramsubst(LinkList l, LinkNode n, char 
      * This is one of the things that decides whether multsub
      * will produce an array, but in an extremely indirect fashion.
      */
-    int nojoin = (pf_flags & PREFORK_SHWORDSPLIT) ? !(ifs && *ifs) : 0;
+    int nojoin = (pf_flags & PREFORK_SHWORDSPLIT) ? !(ifs && *ifs) && !qt : 0;
     /*
      * != 0 means ${...}, otherwise $...  What works without braces
      * is largely a historical artefact (everything works with braces,
Index: Test/D04parameter.ztst
===================================================================
RCS file: /cvsroot/zsh/zsh/Test/D04parameter.ztst,v
retrieving revision 1.62
diff -p -u -r1.62 D04parameter.ztst
--- Test/D04parameter.ztst	22 Feb 2012 15:35:50 -0000	1.62
+++ Test/D04parameter.ztst	28 Feb 2012 10:23:11 -0000
@@ -1475,3 +1475,13 @@
    print ${#foo}
 0:Nularg removed from split empty string
 >0
+
+   (set -- a b c
+    setopt shwordsplit
+    IFS=
+    print -rl "$*"
+    unset IFS
+    print -rl "$*")
+0:Regression test for shwordsplit with null or unset IFS and quoted array
+>abc
+>a b c


-- 
Peter Stephenson <pws@xxxxxxx>            Software Engineer
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