From @cpansprout

This behaves as expected​:

$ ./perl -Ilib -we 'my $y if 0; my $y'
Deprecated use of my() in false conditional at -e line 1.
"my" variable $y masks earlier declaration in same scope at -e line 1.

If I accomplish the same thing inside a subroutine signature, I get the wrong warning​:

$ ./perl -Ilib -wE 'use experimental "signatures"; sub foo($x=0 && my $y, $y=1) {}'
Deprecated use of my() in false conditional at -e line 1.
"state" variable $y masks earlier declaration in same scope at -e line 1.

There is no state variable there.

I get the same results from 5.20.1 to 5.25.3.

--

Father Chrysostomos

From @cpansprout

On Sat Jul 23 22​:38​:31 2016, sprout wrote​:

This behaves as expected​:

$ ./perl -Ilib -we 'my $y if 0; my $y'
Deprecated use of my() in false conditional at -e line 1.
"my" variable $y masks earlier declaration in same scope at -e line 1.

If I accomplish the same thing inside a subroutine signature, I get
the wrong warning​:

$ ./perl -Ilib -wE 'use experimental "signatures"; sub foo($x=0 && my
$y, $y=1) {}'
Deprecated use of my() in false conditional at -e line 1.
"state" variable $y masks earlier declaration in same scope at -e line
1.

There is no state variable there.

I get the same results from 5.20.1 to 5.25.3.

The ‘my in false conditional’ is unrelated. I just came across this bug when experimenting with that.

$ ./perl -Ilib -wE 'use experimental "signatures"; sub foo($y, $y) {}'
"state" variable $y masks earlier declaration in same scope at -e line 1.

--

Father Chrysostomos

The RT System itself - Status changed from 'new' to 'open'

From @iabyn

On Sat, Jul 23, 2016 at 10​:39​:34PM -0700, Father Chrysostomos via RT wrote​:

On Sat Jul 23 22​:38​:31 2016, sprout wrote​:

This behaves as expected​:

$ ./perl -Ilib -we 'my $y if 0; my $y'
Deprecated use of my() in false conditional at -e line 1.
"my" variable $y masks earlier declaration in same scope at -e line 1.

If I accomplish the same thing inside a subroutine signature, I get
the wrong warning​:

$ ./perl -Ilib -wE 'use experimental "signatures"; sub foo($x=0 && my
$y, $y=1) {}'
Deprecated use of my() in false conditional at -e line 1.
"state" variable $y masks earlier declaration in same scope at -e line
1.

There is no state variable there.

I get the same results from 5.20.1 to 5.25.3.

The ‘my in false conditional’ is unrelated. I just came across this bug when experimenting with that.

$ ./perl -Ilib -wE 'use experimental "signatures"; sub foo($y, $y) {}'
"state" variable $y masks earlier declaration in same scope at -e line 1.

I'll look into fixing this in my sig branch

--
The optimist believes that he lives in the best of all possible worlds.
As does the pessimist.

From @iabyn

On Mon, Jul 25, 2016 at 09​:08​:15AM +0100, Dave Mitchell wrote​:

On Sat, Jul 23, 2016 at 10​:39​:34PM -0700, Father Chrysostomos via RT wrote​:

On Sat Jul 23 22​:38​:31 2016, sprout wrote​:

This behaves as expected​:

$ ./perl -Ilib -we 'my $y if 0; my $y'
Deprecated use of my() in false conditional at -e line 1.
"my" variable $y masks earlier declaration in same scope at -e line 1.

If I accomplish the same thing inside a subroutine signature, I get
the wrong warning​:

$ ./perl -Ilib -wE 'use experimental "signatures"; sub foo($x=0 && my
$y, $y=1) {}'
Deprecated use of my() in false conditional at -e line 1.
"state" variable $y masks earlier declaration in same scope at -e line
1.

There is no state variable there.

I get the same results from 5.20.1 to 5.25.3.

The ‘my in false conditional’ is unrelated. I just came across this bug when experimenting with that.

$ ./perl -Ilib -wE 'use experimental "signatures"; sub foo($y, $y) {}'
"state" variable $y masks earlier declaration in same scope at -e line 1.

I'll look into fixing this in my sig branch

Now fixed by v5.25.3-118-gd79f31b

--
Counsellor Troi states something other than the blindingly obvious.
  -- Things That Never Happen in "Star Trek" #16

@cpansprout - Status changed from 'open' to 'resolved'