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30993: fix parameter modifier crash with :wq on empty string

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Peter Stephenson 2013-01-22 16:28:58 +00:00
parent 27c5a0d774
commit 44757a653c
3 changed files with 23 additions and 2 deletions
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8
ChangeLog
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@ -1,3 +1,9 @@
2013-01-22 Peter Stephenson <p.stephenson@samsung.com>
* 30993: Src/subst.c, Test/D04parameter.ztst: parameter
modifiers :wq operating on an empty string crashed the shell.
The shell isn't supposed to crash.
2013-01-20 Oliver Kiddle <opk@zsh.org>
* 30987: Completion/X/Command/_xrandr: only call xrandr when
@ -455,5 +461,5 @@
*****************************************************
* This is used by the shell to define $ZSH_PATCHLEVEL
* $Revision: 1.5787 $
* $Revision: 1.5788 $
*****************************************************

10
Src/subst.c
View file

@ -3707,6 +3707,11 @@ paramsubst(LinkList l, LinkNode n, char **str, int qt, int pf_flags)
char *y;
x = val;
if (!x) {
/* Shouldn't have got here with a NULL string. */
DPUTS(1, "value is NULL in paramsubst");
return NULL;
}
if (prenum || postnum)
x = dopadding(x, prenum, postnum, preone, postone,
premul, postmul
@ -4021,7 +4026,10 @@ modify(char **str, char **ptr)
all = tmp;
t = e;
}
*str = all;
if (!all)
*str = dupstring("");
else
*str = all;
} else {
switch (c) {

7
Test/D04parameter.ztst
View file

@ -1544,3 +1544,10 @@
0:Regression test for shwordsplit with null or unset IFS and quoted array
>abc
>a b c
foo=
print ${foo:wq}
print ${:wq}
0:Empty parameter shouldn't cause modifiers to crash the shell
>
>