develooper Front page | perl.perl5.porters | Postings from April 2006

[perl #38920] Filter::Simple error messages getting mangled inside require

From:
Nicholas Clark
Date:
April 14, 2006 12:54
Subject:
[perl #38920] Filter::Simple error messages getting mangled inside require
Message ID:
rt-3.0.11-38920-132282.4.52974622522355@perl.org
# New Ticket Created by  Nicholas Clark 
# Please include the string:  [perl #38920]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/rt3/Ticket/Display.html?id=38920 >



This is a bug report for perl from nick@ccl4.org,
generated with the help of perlbug 1.35 running under perl 5.9.4.


-----------------------------------------------------------------
[Please enter your report here]

Not sure if this is a Filter::Simple bug, or a more general core bug.
Given my module:

package Shout;

use Filter::Simple;

FILTER_ONLY (string => sub { $_ =~ tr/a-z/A-Z/; });

1;
__END__

then if I try to feed a perl script through it that it converts to erroneous
perl, I see a sensible error message:

$ cat filter.pl 
use Shout;

print "Oi!\n";
__END__
$ perl filter.pl 
Missing braces on \N{} at filter.pl line 3, within string
Execution of filter.pl aborted due to compilation errors.

which is what I expect.

However, if that same code is in a module:

$ cat Filter.pm 
use Shout;

print "Oi!\n";

1;
___END__
$ perl -e 'use Filter'
No quotelike operator found after prefix at ";
...", detected at offset 18Missing braces on \N{} at Filter.pm line 3, within string
Compilation failed in require at -e line 1.
BEGIN failed--compilation aborted at -e line 1.


It all gets mangled. The mangling seems wrong.
IIRC Robin and I found something similar while looking at Switch.pm, while
he was starting out on his switch patch. Something to do with calling die
a second time, and therefore it rethrows $@. But I'm not certain of this.

Nicholas Clark

[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
    category=library
    severity=low
---
Site configuration information for perl 5.9.4:

Configured by nick at Fri Apr 14 17:24:09 BST 2006.

Summary of my perl5 (revision 5 version 9 subversion 4) configuration:
  Platform:
    osname=freebsd, osvers=5.3-release-p28, archname=i386-freebsd-thread-multi
    uname='freebsd saigo.etla.org 5.3-release-p28 freebsd 5.3-release-p28 #0: wed mar 29 21:59:21 bst 2006 root@saigo.etla.org:usrobjusrsrcsyssaigo i386 '
    config_args='-Dusedevel=y -Dcc=ccache gcc -Dld=gcc -Ubincompat5005 -Uinstallusrbinperl -Dcf_email=nick@ccl4.org -Dperladmin=nick@ccl4.org -Dinc_version_list=  -Dinc_version_list_init=0 -Doptimize=-g -Dusethreads -Uuse64bitint -Uusemymalloc -Duseperlio -Dprefix=~/Sandpit/snap5.9.x-27802 -Dinstallman1dir=none -Dinstallman3dir=none -de'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=undef, use64bitall=undef, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='ccache gcc', ccflags ='-DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -DDEBUGGING -fno-strict-aliasing -pipe -Wdeclaration-after-statement -I/usr/local/include',
    optimize='-g',
    cppflags='-DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -DDEBUGGING -fno-strict-aliasing -pipe -Wdeclaration-after-statement -I/usr/local/include'
    ccversion='', gccversion='3.4.2 [FreeBSD] 20040728', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags ='-Wl,-E  -L/usr/local/lib'
    libpth=/usr/lib /usr/local/lib
    libs=-lm -lcrypt -lutil -lc_r
    perllibs=-lm -lcrypt -lutil -lc_r
    libc=, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' '
    cccdlflags='-DPIC -fPIC', lddlflags='-shared  -L/usr/local/lib'

Locally applied patches:
    

---
@INC for perl 5.9.4:
    lib
    /home/nick/Sandpit/snap5.9.x-27802/lib/perl5/5.9.4/i386-freebsd-thread-multi
    /home/nick/Sandpit/snap5.9.x-27802/lib/perl5/5.9.4
    /home/nick/Sandpit/snap5.9.x-27802/lib/perl5/site_perl/5.9.4/i386-freebsd-thread-multi
    /home/nick/Sandpit/snap5.9.x-27802/lib/perl5/site_perl/5.9.4
    .

---
Environment for perl 5.9.4:
    HOME=/home/nick
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/nick/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin:/home/nick/bin:/usr/local/sbin:/sbin:/usr/sbin
    PERL_BADLANG (unset)
    SHELL=/usr/local/bin/bash




nntp.perl.org: Perl Programming lists via nntp and http.
Comments to Ask Bjørn Hansen at ask@perl.org | Group listing | About