DAVEM TPF grant#2 report #19

This week I continued working on fixing Perl_re_intuit_start().

I also fixed a regression in maint-5.18 regarding whether a variable
is seen in a regex that has a hash char class and an embedded newline,
like

    m{[#]
    $foo}x

A side-effect of working on that led me to waste about 5 hours trying to
get maint-5.18 to pass under clang/address-sanitiser. The failures
appeared random, and bisecting showed that they were "fixed" in blead by a
commit that should have made no difference; but cherry-picking that commit
made the problem go away. It was also sensitive to re-compiles: touch, but
don't change perl.h, and recompile, and the problem changed or went away.
Eventually I decided it was probably a weird clang issue, and abandoned
the effort.

2014/02/17
     0:26 process p5p mailbox
     5:37 RT#120692 Slow global pattern match with input from utf8

2014/02/18
     0:14 process p5p mailbox
     5:10 RT #119125 /[#]/ and codeblocks in maint
     0:36 RT#120692 Slow global pattern match with input from utf8

2014/02/21
     1:00 process p5p mailbox

2014/02/22
     5:00 clang/asan weirdness on maint

2014/02/23
     5:20 process p5p mailbox
     1:28 [perl #121230] process group kill on Win32 broken in 5.17.2

SUMMARY:
      5:10 RT #119125 /[#]/ and codeblocks in maint
      6:13 RT#120692 Slow global pattern match with input from utf8
      1:28 [perl #121230] process group kill on Win32 broken in 5.17.2
      5:00 clang/asan weirdness on maint
      7:00 process p5p mailbox
    ------
     24:51 TOTAL (HH::MM)


-- 
"But Sidley Park is already a picture, and a most amiable picture too.
The slopes are green and gentle. The trees are companionably grouped at
intervals that show them to advantage. The rill is a serpentine ribbon
unwound from the lake peaceably contained by meadows on which the right
amount of sheep are tastefully arranged." -- Lady Croom, "Arcadia"

• DAVEM TPF grant#2 report #19 by Dave Mitchell