Hi,

Strawberry Perl's (portable PDL edition) portableshell.bat contains the following one-liner: 
perl -MConfig -MPDL -e "printf("""Perl executable: %%s\nPerl version  
+ : %%vd / $Config{archname}\nPDL version    : %%s\n\n""", $^X, $^V, $
+PDL::VERSION)";

[download]
The behaviour of that one-liner changes between perl-5.38.0 and perl-5.40.0. (See https://github.com/StrawberryPerl/Perl-Dist-Strawberry/issues/200.

Here's a reduced demo of the issue.
On perl-5.38.0, on my Windows 11 box, I get: 
D:\>perl -le "print $];printf(""" wtf""")";
5.038000
 wtf
D:\>perl -le "print $];printf("""wtf""")";
5.038000
wtf

[download]
On perl-5.40.0, on the same Windows box, running the same 2 one-liners,I get: 
D:\>perl -le "print $];printf(""" wtf""")";
Can't find string terminator '"' anywhere before EOF at -e line 1.

D:\>perl -le "print $];printf("""wtf""")";
5.040000
wtf

[download]
Why does that error occur ?

If I change the triplets of double-quotes to pairs of double-quotes, the behavioural differences take another turn.
With perl-5.38.0: 
D:\>perl -le "print $];printf("" wtf"")";
Can't find string terminator '"' anywhere before EOF at -e line 1.

D:\>perl -le "print $];printf(""wtf"")";
Can't find string terminator '"' anywhere before EOF at -e line 1.

[download]
And with perl-5.40.0: 
D:\>perl -le "print $];printf("" wtf"")";
5.040000
 wtf
D:\>perl -le "print $];printf(""wtf"")";
5.040000
wtf

[download]
Is there some perl bugginess going on here ? ... or am I merely looking at changes in undefined (or implementation defined) behaviour ?

I must confess that I don't know what to expect with all of those multiple double quotes.
Insights are most welcome.

Cheers,
Rob

In reply to [Win32] Weird behavioural change between 5.38.0 and 5.40.0 by syphilis

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.