# \[Bug:1.9\] nkf with --numchar-input dumps core

**URL:** <https://www.ruby-forum.com/t/bug-1-9-nkf-with-numchar-input-dumps-core/151879>\
**Category:** Development\
**Created:** [October 27, 2008, 1:53pm UTC](https://www.ruby-forum.com/t/bug-1-9-nkf-with-numchar-input-dumps-core/151879 "2008-10-27T13:53:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [October 27, 2008, 1:53pm UTC](https://www.ruby-forum.com/t/bug-1-9-nkf-with-numchar-input-dumps-core/151879/1 "2008-10-27T13:53:10Z")

</div>

e$B1sF#$G$9!#e(B

nkf e$B$N%S%k%ICf$Ke(B

gcc -I. -I…/…/.ext/include/i686-linux -I…/…/./include  
-I…/…/./ext/nkf -DRUBY\_EXTCONF\_H=“extconf.h”  
-D\_FILE\_OFFSET\_BITS=64 -fPIC -O3 -g -Wall -Wno-parentheses -o nkf.o  
-c nkf.c  
nkf-utf8/nkf.c: In function ‘numchar\_getc’:  
nkf-utf8/nkf.c:4127: e$B7Y9pe(B: array subscript is above array bounds  
nkf-utf8/nkf.c:4127: e$B7Y9pe(B: array subscript is above array bounds  
nkf-utf8/nkf.c:4114: e$B7Y9pe(B: array subscript is above array bounds  
nkf-utf8/nkf.c:4114: e$B7Y9pe(B: array subscript is above array bounds

e$B$H$$$&7Y9p$,=P$F$$$^$7$?!#\<B:]!"0J2\<$N$h$&$K$9$k$HMn$A$^$9!#e(B

$ ruby19 -rnkf -e ‘NKF.nkf("–numchar-input -w", “�”)’  
-e:1: [BUG] Segmentation fault  
ruby 1.9.0 (2008-10-26 revision 19952) [i686-linux]

## – control frame ---------- c:0004 p:---- s:0011 b:0011 l:000010 d:000010 CFUNC :nkf c:0003 p:0019 s:0006 b:0006 l:000005 d:000005 TOP -e:1 c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH :inherited c:0001 p:0000 s:0002 b:0002 l:000001 d:000001 TOP :17

## DBG\> : “-e:1:in `nkf'" DBG> : "-e:1:in`'” – backtrace of native function call (Use addr2line) – 0x8151064 0x818ab7e 0x818abf8 0x80ebee0 0xffffe440 0xb7c2c404 0x813cc7a 0x814f09b 0x814191d 0x8148ac2 0x8148cb4 0x805a18f 0x805bf76 0x80591e0 0xb7de9ea8 0x80590c1

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# Index: ext/nkf/nkf-utf8/nkf.c

— ext/nkf/nkf-utf8/nkf.c (revision 19966)  
+++ ext/nkf/nkf-utf8/nkf.c (working copy)  
@@ -4100,7 +4100,7 @@  
nkf\_char (\*g)(FILE \*) = i\_ngetc;  
nkf\_char (\*u)(nkf\_char c ,FILE \*f) = i\_nungetc;  
int i = 0, j;

- nkf\_char buf[8];

- nkf\_char buf[12];  
long c = -1;

e$B$G$b!"0J2\<$N$h$&$Ke(B あ  
e$B$KBP$7$F6uJ8;zNs$rJV$9$N$G!“B\>$K$be(B  
e$BLdBj$,$”$k$h$&$G$9!#e(B

$ ruby19 -rnkf -e ‘p NKF.nkf("–numchar-input -w", “あ”)’  
“”

---

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [October 28, 2008, 3:38pm UTC](https://www.ruby-forum.com/t/bug-1-9-nkf-with-numchar-input-dumps-core/151879/2 "2008-10-28T15:38:20Z")

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e$B%A%1%C%He(B #687 e$B$,99?7$5$l$^$7$?!#e(B (by Yui NARUSE)

e$B%9%F!\<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B  
e$B?JD=e(B % 0e$B$+$ie(B100e$B$KJQ99e(B

## Applied in changeset r20004.

[http://redmine.ruby-lang.org/issues/show/687](http://redmine.ruby-lang.org/issues/show/687)