http://d.puremagic.com/issues/show_bug.cgi?id=9171

           Summary: error optimization of expression
           Product: D
           Version: D2
          Platform: x86
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: syavadee@gmail.com


--- Comment #0 from Syava Dee <syavadee@gmail.com> 2012-12-17 02:10:14 PST ---
Created an attachment (id=1169)
source file showing problem

$ dmd -O bug.d && ./bug
nobug:
r=0111000000000000000100000000000000000000000000000000
z=0000000000000000000010000000000000000000000000000000
bug:
r=0111000000000000000100000000000000000000000000000000
z=0000000000000000000000000000000000000000000000000000
#                     ^
this wrong

$ dmd bug.d && ./bug
nobug:
r=0111000000000000000100000000000000000000000000000000
z=0000000000000000000010000000000000000000000000000000
bug:
r=0111000000000000000100000000000000000000000000000000
z=0000000000000000000010000000000000000000000000000000
#                     ^
this ok

dmd 2.060, ubuntu 12.04 and windows xp

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Syava Dee <syavadee@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |critical


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--- Comment #1 from Don <clugdbug@yahoo.com.au> 2012-12-17 07:34:34 PST ---
Works for me on git head.
Could be a duplicate of bug 8840.

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--- Comment #2 from github-bugzilla@puremagic.com 2012-12-17 18:14:19 PST ---
Commit pushed to dmd-1.x at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/118d3da3a9b35911afbf2eae98084f75c33802f3 fix Issue 9171 - error optimization of expression

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--- Comment #3 from github-bugzilla@puremagic.com 2012-12-17 18:14:24 PST ---
Commit pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/d4b885b88675cfdde0f1e8c92d94797d41e077ea fix Issue 9171 - error optimization of expression

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla@digitalmars.com
         Resolution|                            |FIXED


--- Comment #4 from Walter Bright <bugzilla@digitalmars.com> 2012-12-17 18:15:00 PST ---
This bug has been there for over 15 years.

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hsteoh@quickfur.ath.cx changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hsteoh@quickfur.ath.cx


--- Comment #5 from hsteoh@quickfur.ath.cx 2012-12-17 18:41:18 PST ---
Scary. Confirms that old adage about non-trivial software being never actually bug-free.

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|D2                          |D1 & D2


--- Comment #6 from Walter Bright <bugzilla@digitalmars.com> 2012-12-17 20:55:17 PST ---
To be fair, triggering this requires a very rare confluence of seemingly random and unrelated things, which is why it hasn't been reported before. It's appearance now suggests an expanding user base for D.

Anyhow, I like to put a high priority on fixing these kinds of issues because they can be very frustrating and demoralizing to users.

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--- Comment #7 from hsteoh@quickfur.ath.cx 2012-12-17 21:01:34 PST ---
Another frustrating one is the template cross-talk one, bug 8542. It discouraged me from writing too much functional-style code, for fear that I might run into it again.

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