[ID 20000424.003] Use of uninialised variable on tied hashed,but not untied hashes.

This is a bug report for perl from mike@fysh.org,
generated with the help of perlbug 1.26 running under perl 5.00503.


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The following code does not generate a warning:

#!/usr/bin/perl -w

$cheese{"cake"}=undef;


However, the following code does:

#!/usr/bin/perl -w

use DB_File;

tie %cheese, 'DB_File', "fred";

$cheese{"cake"}=undef;

I get a "Use of uninitalized variable" warning, which is a shame, because it
makes -w unusable in my particular case (I'm creating millions of undefined
hash elements).  The 'exists' versus 'defined' functionality appears to be
working correctly; it's the superfluous warning that causes me a problem.

Cheers,
Mike.

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Site configuration information for perl 5.00503:

Configured by torin at Mon Mar 27 07:50:39 PST 2000.

Summary of my perl5 (5.0 patchlevel 5 subversion 3) configuration:
  Platform:
    osname=linux, osvers=2.2.14, archname=i386-linux
    uname='linux perv 2.2.14 #1 sat jan 15 20:48:59 pst 2000 i686 unknown '
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef useperlio=undef d_sfio=undef
  Compiler:
    cc='cc', optimize='-O2 ', gccversion=2.95.2 20000220 (Debian GNU/Linux)
    cppflags='-Dbool=char -DHAS_BOOL -D_REENTRANT -DDEBIAN -I/usr/local/include'
    ccflags ='-Dbool=char -DHAS_BOOL -D_REENTRANT -DDEBIAN -I/usr/local/include'
    stdchar='char', d_stdstdio=undef, usevfork=false
    intsize=4, longsize=4, ptrsize=4, doublesize=8
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    alignbytes=4, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lndbm -lgdbm -ldbm -ldb -ldl -lm -lc -lposix -lcrypt
    libc=, so=so, useshrplib=false, libperl=libperl.a
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'

Locally applied patches:
    

---
@INC for perl 5.00503:
    /usr/lib/perl5/5.005/i386-linux
    /usr/lib/perl5/5.005
    /usr/local/lib/site_perl/i386-linux
    /usr/local/lib/site_perl
    /usr/lib/perl5
    .

---
Environment for perl 5.00503:
    HOME=/home/mike
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/mike/bin/:/usr/local/bin:/usr/bin/:/bin/:/usr/bin/X11:/usr/openwin/bin/xview:/usr/openwin/bin:/usr/ucb:/usr/etc:/usr/local/bin:/diskB/local/tran/bin:/usr/local/java/bin/:/usr/local/lib/xemacs/site-lisp/tm/methods:/usr/local/teTeX/bin:/usr/local/netpbm-bin/bin:/usr/lib/teTeX/bin
    PERL_BADLANG (unset)
    SHELL=/usr/bin/zsh

• Re: [ID 20000424.003] Use of uninialised variable on tied hashed, but not untied hashes. by Joe Smith
• [ID 20000424.003] Use of uninialised variable on tied hashed,but not untied hashes. by Mike Ashton
• Re: [ID 20000424.003] Use of uninialised variable on tied hashed, but not untied hashes. by M.J.T. Guy