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search position reset by 'local' save/restore #743

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p5pRT opened this issue Oct 20, 1999 · 2 comments
Closed

search position reset by 'local' save/restore #743

p5pRT opened this issue Oct 20, 1999 · 2 comments

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@p5pRT
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@p5pRT p5pRT commented Oct 20, 1999

Migrated from rt.perl.org#1666 (status was 'resolved')

Searchable as RT1666$

@p5pRT
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@p5pRT p5pRT commented Oct 20, 1999

From oloryn@mindspring.com

jalex mentioned this on #perl. I'm not sure if he sent in a bug report
or not.

This program​:

#!/usr/bin/perl -w
$x = "123 56"; $x =~ / /g;
print "$x, ", pos($x), "\n";
{ local $x }
print "$x, ", pos($x), "\n";

produces the output

123 56, 4
123 56, Use of uninitialized value at test.plx line 5.

The search position for a match appears to be reset when the target
variable goes through a 'local' save and restore.

I get the same results on 5.005_03 on linux.

Ben


Site configuration information for perl 5.00553​:

Configured by bcoleman at Sat Feb 13 21​:36​:29 EST 1999.

Summary of my perl5 (5.0 patchlevel 5 subversion 53) configuration​:
  Platform​:
  osname=os2, osvers=2.40, archname=os2
  uname='os2 oloryn 2 2.40 i386 '
  hint=recommended, useposix=true, d_sigaction=define
  usethreads=undef useperlio=undef d_sfio=undef
  Compiler​:
  cc='gcc', optimize='-O2 -fomit-frame-pointer -malign-loops=2
-malign-jumps=2 -malign-functions=2 -s', gccversion=2.7.2.1
  cppflags='-Zomf -Zmt -DDOSISH -DOS2=2 -DEMBED -I.'
  ccflags ='-Zomf -Zmt -DDOSISH -DOS2=2 -DEMBED -I.'
  stdchar='char', d_stdstdio=define, usevfork=false
  intsize=4, longsize=4, ptrsize=4, doublesize=8
  d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
  alignbytes=4, usemymalloc=y, prototype=define
  Linker and Libraries​:
  ld='gcc', ldflags ='-Zexe -Zomf -Zmt -Zcrtdll -Zstack 32000'
  libpth=g​:/emx/lib G​:/JAVA11/LIB g​:/emx/lib/mt
  libs=-lsocket -lm -lbsd
  libc=g​:/emx/lib/mt/c_import.lib, so=dll, useshrplib=true,
libperl=libperl.lib
  Dynamic Linking​:
  dlsrc=dl_dlopen.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
  cccdlflags='-Zdll', lddlflags='-Zdll -Zomf -Zmt -Zcrtdll -s'

Locally applied patches​:
 


@​INC for perl 5.00553​:
  g​:/perl/lib/5.00553/os2
  g​:/perl/lib/5.00553
  g​:/perl/lib/site_perl/5.00553/os2
  g​:/perl/lib/site_perl/5.00553
  .


Environment for perl 5.00553​:
  HOME=F​:\home\
  LANG=EN_US
  LD_LIBRARY_PATH (unset)
  LOGDIR (unset)
 

PATH=F​:\NETSCAPE\PROGRAM;H​:\MPTN\BIN;H​:\IBMCOM;G​:\GNU\BIN;H​:\OS2;H​:\OS2\

SYSTEM;H​:\OS2\MDOS\WINOS2;H​:\OS2\INSTALL;H​:\;H​:\OS2\MDOS;H​:\OS2\APPS;H​:\

MMOS2;G​:\EMX\BIN;F​:\OS2BIN;F​:\OS2BIN\PERL;G​:\EPM;G​:\TS\OS2_SYS;F​:\PGP26;

F​:\BACKMAST;F​:\INCHARGE;F​:\BONUSPAK\IBMWORKS;H​:\TCPIP\BIN;H​:\TCPIP\PCOMO

S2;H​:\TCPIP\UMAIL;G​:\PERL\BIN;G​:\PERL\OS2BIN;F​:\BA2PRO;F​:\PERF_30;F​:\PER

F_30;G​:\XFree86\bin;F​:\Office50;H​:\JAVA11\BIN;F​:\emtex\bin;F​:\gstools\gs

5.50;
  PERL_BADLANG=0
  PERL_BADLANG=0
  PERL_SH_DIR=G​:\GNU\BIN
  SHELL (unset)

--
Ben Coleman oloryn@​mindspring.com | The attempt to legislatively
http​://oloryn.home.mindspring.com/ | micromanage equality results, at
  | best, in equal misery for all.

@p5pRT
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@p5pRT p5pRT commented Oct 20, 1999

From @mjdominus

jalex mentioned this on #perl. I'm not sure if he sent in a bug report
or not.

Éric Brunet reported this on Monday. The Subject​: was

  BUG​: local scope modifies pos()

Thanks for sedning in the second report.

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