PPI 1.281 chokes on simple code

[book]

Here's how to reproduce:

$ perl -MPPI -E '
    say PPI->VERSION;
    PPI::Document->new( \q{use feature "signatures", "postderef"; 1;} )
      or do { die $@ };
'
1.281
unknown arg decompose type: , , PPI::Token::Operator at .../lib/perl5/PPI/Statement/Include.pm line 322.

Note that the error doesn't show up if the include statement is followed by anything non-significant.

[haarg]

The argument parsing done on the use statements doesn't seem to handle multiple arguments joined with commas.

It also seems like it will barf if there is anything unexpected in the arguments, like something dynamic. While dynamic arguments obviously can't be resolved to allow handling signatures, dying doesn't seem like the correct behavior.

The feature tracking also doesn't seem to work for subs later in the same line as something enabling the feature. They have to be on a new line.

[wchristian]

@book The choking on simple code should be fixed with 1.283.

@haarg The barfing is replaced with a warning. Thanks for the "next line" matter, i'll need to address that.

@preaction The root cause for your two fix commits should be fixed as well.