Description
Using the ternary conditional operator together with autovivification and dereferencing works no more in v5.32.
Steps to Reproduce
Example 1: Push a value onto a dereferenced hash entry, which does not yet exist:
> perl -MData::Dumper -wE 'my $x={arr=>undef}; push( @{$x->{decide} ? $x->{not_there} : $x->{new}} , "nana"); say Data::Dumper::Dumper($x)'
Not an ARRAY reference at -e line 1.
Example 2: Pushing onto an existing, but undefined hash entry
> perl -MData::Dumper -wE 'my $x={arr=>undef}; push( @{$x->{decide} ? $x->{not_there} : $x->{arr}} , "nana"); say Data::Dumper::Dumper($x)'
Not an ARRAY reference at -e line 1.
Problem can be reproduced with strawberry perl and self-compiled perl under linux.
Expected behavior
Same code works with older perl v5.30.3.1
Example 1:
> perl -MData::Dumper -wE 'my $x={arr=>undef}; push( @{$x->{decide} ? $x->{not_there} : $x->{new}} , "nana"); say Data::Dumper::Dumper($x)'
$VAR1 = {
'new' => [
'nana'
],
'arr' => undef
};
Example 2:
> perl -MData::Dumper -wE 'my $x={arr=>undef}; push( @{$x->{decide} ? $x->{not_there} : $x->{arr}} , "nana"); say Data::Dumper::Dumper($x)'
$VAR1 = {
'arr' => [
'nana'
]
};
Perl configuration
Summary of my perl5 (revision 5 version 32 subversion 0) configuration:
Platform:
osname=linux
osvers=4.12.14-95.54-default
archname=x86_64-linux
uname='linux sles12sp4 4.12.14-95.54-default #1 smp thu jun 4 12:49:28 utc 2020 (892ef1f) x86_64 x86_64 x86_64 gnulinux '
config_args='-des -Dprefix=/opt/perl-5.32.0/ -Duserelocatableinc -Duse64bitint'
hint=recommended
useposix=true
d_sigaction=define
useithreads=undef
usemultiplicity=undef
use64bitint=define
use64bitall=define
uselongdouble=undef
usemymalloc=n
default_inc_excludes_dot=define
bincompat5005=undef
Compiler:
cc='cc'
ccflags ='-fwrapv -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2'
optimize='-O2'
cppflags='-fwrapv -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion=''
gccversion='4.8.5'
gccosandvers=''
intsize=4
longsize=8
ptrsize=8
doublesize=8
byteorder=12345678
doublekind=3
d_longlong=define
longlongsize=8
d_longdbl=define
longdblsize=16
longdblkind=3
ivtype='long'
ivsize=8
nvtype='double'
nvsize=8
Off_t='off_t'
lseeksize=8
alignbytes=8
prototype=define
Linker and Libraries:
ld='cc'
ldflags =' -fstack-protector -L/usr/local/lib'
libpth=/usr/local/lib /usr/lib64/gcc/x86_64-suse-linux/4.8/include-fixed /usr/lib64/gcc/x86_64-suse-linux/4.8/../../../../x86_64-suse-linux/lib /usr/lib /lib/../lib64 /usr/lib/../lib64 /lib /lib64 /usr/lib64 /usr/local/lib64
libs=-lpthread -lnsl -ldb -ldl -lm -lcrypt -lutil -lc
perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc
libc=libc-2.22.so
so=so
useshrplib=false
libperl=libperl.a
gnulibc_version='2.22'
Dynamic Linking:
dlsrc=dl_dlopen.xs
dlext=so
d_dlsymun=undef
ccdlflags='-Wl,-E'
cccdlflags='-fPIC'
lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector'
Characteristics of this binary (from libperl):
Compile-time options:
HAS_TIMES
PERLIO_LAYERS
PERL_COPY_ON_WRITE
PERL_DONT_CREATE_GVSV
PERL_MALLOC_WRAP
PERL_OP_PARENT
PERL_PRESERVE_IVUV
USE_64_BIT_ALL
USE_64_BIT_INT
USE_LARGE_FILES
USE_LOCALE
USE_LOCALE_COLLATE
USE_LOCALE_CTYPE
USE_LOCALE_NUMERIC
USE_LOCALE_TIME
USE_PERLIO
USE_PERL_ATOF
Built under linux
Compiled at Dec 14 2020 15:22:37
@INC:
/work/perl/v5.32.0.1/linux/lib/site_perl/5.32.0/x86_64-linux
/work/perl/v5.32.0.1/linux/lib/site_perl/5.32.0
/work/perl/v5.32.0.1/linux/lib/5.32.0/x86_64-linux
/work/perl/v5.32.0.1/linux/lib/5.32.0
Description
Using the ternary conditional operator together with autovivification and dereferencing works no more in v5.32.
Steps to Reproduce
Example 1: Push a value onto a dereferenced hash entry, which does not yet exist:
Example 2: Pushing onto an existing, but undefined hash entry
Problem can be reproduced with strawberry perl and self-compiled perl under linux.
Expected behavior
Same code works with older perl v5.30.3.1
Example 1:
Example 2:
Perl configuration