[Rd] valgrind complains about regex.c (PR#8043)

[charlie@stat.umn.edu]

I think I am using objects according to the man page.
This seems to be a valid regular expression.  But whether
I know what I'm doing or no, it still shouldn't be doing
what valgrind seems to be saying it's doing.  (IMHO)
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Script started on Mon 01 Aug 2005 02:09:00 PM PDT
linux$ printenv VALGRIND_OPTS
--tool=3Dmemcheck
linux$ cat bar.R

 foo <- 1
 bar <- 2:3
 baz <- 4:6
 qux <- matrix(7:10, 2)

 ls()
 rm(list =3D objects(pattern =3D "^[a-pr-z]"))
 ls()

linux$ R --version
R 2.1.1 (2005-06-20).
Copyright (C) 2005 R Development Core Team

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under the terms of the GNU
General Public License.  For more information about these matters,
see http://www.gnu.org/copyleft/gpl.html.
linux$ gcc --version
=1B[0mgcc (GCC) 3.3.5 20050117 (prerelease) (SUSE Linux)
=1B[0mCopyright (C) 2003 Free Software Foundation, Inc.
=1B[0mThis is free software; see the source for copying conditions.  There =
is NO
=1B[0mwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PU=
RPOSE.
=1B[0m
linux$ cat /etc/SuSE-release=20
SuSE Linux 9.3 (i586)
VERSION =3D 9.3
linux$ R --vanilla --debugger=3Dvalgrind < bar.R >| bar.Rout
=3D=3D22324=3D=3D Memcheck, a memory error detector for x86-linux.
=3D=3D22324=3D=3D Copyright (C) 2002-2004, and GNU GPL'd, by Julian Seward =
et al.
=3D=3D22324=3D=3D Using valgrind-2.2.0, a program supervision framework for=
 x86-linux.
=3D=3D22324=3D=3D Copyright (C) 2000-2004, and GNU GPL'd, by Julian Seward =
et al.
=3D=3D22324=3D=3D For more details, rerun with: -v
=3D=3D22324=3D=3D=20
=3D=3D22324=3D=3D Invalid read of size 4
=3D=3D22324=3D=3D    at 0x81255AD: parse_expression (regex.c:5045)
=3D=3D22324=3D=3D    by 0x8125868: parse_branch (regex.c:4475)
=3D=3D22324=3D=3D    by 0x8125913: parse_reg_exp (regex.c:4420)
=3D=3D22324=3D=3D    by 0x81261B3: Rf_regcomp (regex.c:4384)
=3D=3D22324=3D=3D  Address 0x1C1E23A8 is 0 bytes after a block of size 32 a=
lloc'd
=3D=3D22324=3D=3D    at 0x1B90650D: calloc (in /usr/lib/valgrind/vgpreload_=
memcheck.so)
=3D=3D22324=3D=3D    by 0x81247B5: parse_expression (regex.c:5406)
=3D=3D22324=3D=3D    by 0x8125868: parse_branch (regex.c:4475)
=3D=3D22324=3D=3D    by 0x8125913: parse_reg_exp (regex.c:4420)
=3D=3D22324=3D=3D=20
=3D=3D22324=3D=3D Invalid write of size 4
=3D=3D22324=3D=3D    at 0x81255B2: parse_expression (regex.c:5045)
=3D=3D22324=3D=3D    by 0x8125868: parse_branch (regex.c:4475)
=3D=3D22324=3D=3D    by 0x8125913: parse_reg_exp (regex.c:4420)
=3D=3D22324=3D=3D    by 0x81261B3: Rf_regcomp (regex.c:4384)
=3D=3D22324=3D=3D  Address 0x1C1E23A8 is 0 bytes after a block of size 32 a=
lloc'd
=3D=3D22324=3D=3D    at 0x1B90650D: calloc (in /usr/lib/valgrind/vgpreload_=
memcheck.so)
=3D=3D22324=3D=3D    by 0x81247B5: parse_expression (regex.c:5406)
=3D=3D22324=3D=3D    by 0x8125868: parse_branch (regex.c:4475)
=3D=3D22324=3D=3D    by 0x8125913: parse_reg_exp (regex.c:4420)
=3D=3D22324=3D=3D=20
=3D=3D22324=3D=3D ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 39 f=
rom 2)
=3D=3D22324=3D=3D malloc/free: in use at exit: 12691882 bytes in 6426 block=
s.
=3D=3D22324=3D=3D malloc/free: 32534 allocs, 26108 frees, 33105500 bytes al=
located.
=3D=3D22324=3D=3D For a detailed leak analysis,  rerun with: --leak-check=
=3Dyes
=3D=3D22324=3D=3D For counts of detected errors, rerun with: -v
linux$ exit

Script done on Mon 01 Aug 2005 02:10:42 PM PDT
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Charles Geyer
Professor, School of Statistics
University of Minnesota
charlie at stat.umn.edu