* segv on 0-length var
@ 1992-10-12 23:54 Donn Cave
0 siblings, 0 replies; only message in thread
From: Donn Cave @ 1992-10-12 23:54 UTC (permalink / raw)
To: rc
Following up on this bug:
; Z='' rc
; whatis Z
Z=''
; Z = ouch
segmentation violation--core dumped
;
The appended patch seems to fix it. The problem arises when listfree()
attempts to free the variable value. The patch is against version 1.4.
Donn Cave, University Computing Services, University of Washington
donn@cac.washington.edu
-------------------------------
*** footobar.c.dist Fri Feb 14 09:05:01 1992
--- footobar.c Mon Oct 12 15:49:28 1992
***************
*** 260,266 ****
top = r = enew(List);
extdef = strchr(extdef, '=') + 1;
if ((f = getenvw(extdef, FALSE)) == NULL) {
! r->w = "";
r->m = NULL;
r->n = NULL;
} else {
--- 260,267 ----
top = r = enew(List);
extdef = strchr(extdef, '=') + 1;
if ((f = getenvw(extdef, FALSE)) == NULL) {
! r->w = ealloc (1);
! r->w[0] = 0;
r->m = NULL;
r->n = NULL;
} else {
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1992-10-12 23:54 segv on 0-length var Donn Cave
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