From: patrick-may@... (Patrick May)
Date: 2002-05-23T05:40:55+09:00
Subject: possible bug: stack dump with <<-String, #{...} and large loops

I had (poorly) coded a #{} with a large loop, i.e.

def html
    <<-HTML
        <h1>This is super ugly....</h1>
        #{ html = ""
           LargeCollection.each { |item|
               html += item.html
           }
           html }
    HTML
end

Now, besides the fact that this is very ugly, it appeared to be
causing core dumps:

16:21:43 /cygdrive/d/src
% runtest.rb admin.rb
.................................................................................
............../coverage.rb:220: [BUG] Segmentation fault
ruby 1.6.4 (2001-06-04) [i386-cygwin]
      0 [sig] ruby 292 open_stackdumpfile: Dumping stack trace to
ruby.exe.stack
dump
Aborted (core dumped)
16:22:06 /cygdrive/d/src
%

I got this core dump at different line numbers in my application until
I corrected the above structure to be

def html
    content = ""
    LargeCollection.each { |item|
        html += item.html
    }

    <<-HTML
        <h1>This is super ugly....</h1>
        #{ content }
    HTML
end

Is this a known problem?

~ Patrick