[Issue 5021] New: Associative array assigned to in spite of exception

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5021

           Summary: Associative array assigned to in spite of exception
           Product: D
           Version: unspecified
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: jmdavisProg at gmx.com


--- Comment #0 from Jonathan M Davis <jmdavisProg at gmx.com> 2010-10-09 00:49:21 PDT ---
This program:

import std.string;

int func()
{
    throw new Exception("It's an exception.");
}

void main()
{
    int[string] arr;

    try
    {
        arr["hello"] = func();
    }
    catch(Exception e)
    {
    }

    assert(arr.length == 0, format("actual: %s", arr.length));
}


results in this output:

core.exception.AssertError at d.d(20): actual: 1
----------------
./d(_d_assert_msg+0x18) [0x8081ab8]
./d(_Dmain+0x8f) [0x807eb0f]
./d(extern (C) int rt.dmain2.main(int, char**)) [0x8081ca6]
./d(extern (C) int rt.dmain2.main(int, char**)) [0x8081c00]
./d(extern (C) int rt.dmain2.main(int, char**)) [0x8081cea]
./d(extern (C) int rt.dmain2.main(int, char**)) [0x8081c00]
./d(main+0x96) [0x8081ba6]
/usr/lib32/libc.so.6(__libc_start_main+0xe6) [0xf75f1c76]
./d() [0x807e9a1]


The associative array should have been unchanged. The assignment never took
place because an exception was thrown before the function could return the
value to be assigned to the associative array. Since no assignment took place,
the associative array should not have changed, but it did. It has 1 value in it
where it should have 0.

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