[Issue 2151] New: Optimizer generates buggy array appending code

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2151

           Summary: Optimizer generates buggy array appending code
           Product: D
           Version: 2.014
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: aniketdhamal at yahoo.co.in
        ReportedBy: kolos80 at bk.ru


I have a loop like this:

i = 0;
...
while (i < s.length && s[i] != '"')
  {
    ...
    tmp ~= s[i];
    ++i;
  }
Usually it works great. When I use the -O flag, it sometimes crashes, but if I
write it like this:
char c;
...
tmp ~= c = s[i];
... then it works great again. I don't see any reason for this strange
behavior, except of optimizer's tricks.


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