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[perl #113782] [PATCH variants] pp_sassign: explain the mix of left<=>right in the optree

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rurban @ cpanel . net
June 21, 2012 15:55
[perl #113782] [PATCH variants] pp_sassign: explain the mix of left<=>right in the optree
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This is a bug report for perl from,
generated with the help of perlbug 1.39 running under perl 5.17.0.

I will attach two variants of patches to fix the pp_sassign 
left<=>right mixup problem.

1. Explain in the ASSIGNOP and in pp_sassign that the two arguments
   for sassign are backwards, right means left hand side in the source,
   left means right hand side.

2. (Preferred variant) Fix left and right in pp_sassign to make it readable.
    lhs and rhs reflect now the parsed source not the position on the optree
    stack. This matches aassign and the terminology in the parser.

Site configuration information for perl 5.17.0:

Configured by rurban at Tue Jun  5 09:17:02 CDT 2012.

Summary of my perl5 (revision 5 version 17 subversion 0) configuration:
  Derived from: fe1ff7d7852127a1276506936e124433997252b5
    osname=linux, osvers=3.2.0-2-amd64, archname=x86_64-linux-thread-multi-debug-asan@fe1ff7d
    uname='linux reini 3.2.0-2-amd64 #1 smp mon may 21 17:45:41 utc 2012 x86_64 gnulinux '
    config_args='-de -Dusedevel -Dinstallman1dir=none -Dinstallman3dir=none -Dinstallsiteman1dir=none -Dinstallsiteman3dir=none -DEBUGGING -Doptimize=-g3 -Duseithreads -D'cc=/home/rurban/Software/llvm-svn157810/build/Release+Asserts/bin/clang' -A'ccflags=-faddress-sanitizer' -Aldflags=-faddress-sanitizer -Alddlflags='-shared\ -faddress-sanitizer' -Duseshrplib -Dcf_email='' -Dperladmin='' -Duseshrplib'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
    cc='/home/rurban/Software/llvm-svn157810/build/Release+Asserts/bin/clang', ccflags ='-Wno-unused-value -D_REENTRANT -D_GNU_SOURCE -faddress-sanitizer -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -faddress-sanitizer -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
    ccversion='', gccversion='4.2.1 Compatible Clang 3.2 (trunk)', gccosandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='/home/rurban/Software/llvm-svn157810/build/Release+Asserts/bin/clang', ldflags ='-ggdb -faddress-sanitizer -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /lib/x86_64-linux-gnu /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib /usr/lib
    libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc -lgdbm_compat
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=, so=so, useshrplib=true,
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -Wl,-rpath,/usr/local/lib/perl5/5.17.0/x86_64-linux-thread-multi-debug-asan@fe1ff7d/CORE'
    cccdlflags='-fPIC', lddlflags='-shared -ggdb -faddress-sanitizer -L/usr/local/lib -fstack-protector'

Locally applied patches:
    [cpan #72700] List::Util heap-overflow

@INC for perl 5.17.0:

Environment for perl 5.17.0:
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PERL_BADLANG (unset)

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