<code>
import std.stdio;
const char[] culprit;//#2
void f(...){	
    char[] s;
    void putc(dchar c){
        std.utf.encode(s, c);
    }
    std.format.doFormat(&putc, _arguments, _argptr);	
    //foreach(char ch; s){} //#9
    writef(s);
}
void main(){
    f("mystery");
}

</code>

The program above does not display "mystery" as expected.
The string can be displayed when line #2 is removed
or when line #9 is uncommented, both seemingly irrelevant.

I've smelt something fishy in dmd's code generator.

zwang wrote:

> <code>
> import std.stdio;
> const char[] culprit;//#2
> void f(...){
>     char[] s;
>     void putc(dchar c){
>         std.utf.encode(s, c);
>     }
>     std.format.doFormat(&putc, _arguments, _argptr);
>     //foreach(char ch; s){} //#9
>     writef(s);
> }
> void main(){
>     f("mystery");
> }
>
> </code>
>
> The program above does not display "mystery" as expected.
> The string can be displayed when line #2 is removed
> or when line #9 is uncommented, both seemingly irrelevant.
>
> I've smelt something fishy in dmd's code generator.

Can you reproduce this bug without using Phobo's functions?

Thomas

Thomas Kühne wrote:
> zwang wrote:
> 
>> <code>
>> import std.stdio;
>> const char[] culprit;//#2
>> void f(...){
>>     char[] s;
>>     void putc(dchar c){
>>         std.utf.encode(s, c);
>>     }
>>     std.format.doFormat(&putc, _arguments, _argptr);
>>     //foreach(char ch; s){} //#9
>>     writef(s);
>> }
>> void main(){
>>     f("mystery");
>> }
>>
>> </code>
>>
>> The program above does not display "mystery" as expected.
>> The string can be displayed when line #2 is removed
>> or when line #9 is uncommented, both seemingly irrelevant.
>>
>> I've smelt something fishy in dmd's code generator.
> 
> 
> Can you reproduce this bug without using Phobo's functions?
> 
> Thomas
> 

I can reproduce the bug without calling std.utf.encode:
<code>
import std.stdio;
const char[] culprit;//#2
void f(...){
    char[] s;
    void putc(dchar c){
	s ~= c;		
    }
    std.format.doFormat(&putc, _arguments, _argptr);
    //foreach(char ch; s){} //#9
    writef(s);
}
void main(){
    f("mystery");
}
</code>

In article <d7tlh1$j0c$1@digitaldaemon.com>, zwang says...
>
>Thomas Kühne wrote:
>> 
>> Can you reproduce this bug without using Phobo's functions?
>> 
>> Thomas
>> 
>
>I can reproduce the bug without calling std.utf.encode:
><code>
>import std.stdio;
>const char[] culprit;//#2
>void f(...){
>     char[] s;
>     void putc(dchar c){
>	s ~= c;
>     }
>     std.format.doFormat(&putc, _arguments, _argptr);
>     //foreach(char ch; s){} //#9
>     writef(s);
>}
>void main(){
>     f("mystery");
>}
></code>

Also, compiling w/ -O gives the expected output (both Linux and Win32).

- Dave

zwang wrote:

> <code>
> import std.stdio;
> const char[] culprit;//#2
> void f(...){
>     char[] s;
>     void putc(dchar c){
>         std.utf.encode(s, c);
>     }
>     std.format.doFormat(&putc, _arguments, _argptr);
>     //foreach(char ch; s){} //#9
>     writef(s);
> }
> void main(){
>     f("mystery");
> }
>
> </code>
>
> The program above does not display "mystery" as expected.
> The string can be displayed when line #2 is removed
> or when line #9 is uncommented, both seemingly irrelevant.
>
> I've smelt something fishy in dmd's code generator.

Added to DStress as http://dstress.kuehne.cn/run/o/odd_bug_03_A.d http://dstress.kuehne.cn/run/o/odd_bug_03_B.d http://dstress.kuehne.cn/run/o/odd_bug_03_C.d

Thomas

"zwang" <nehzgnaw@gmail.com> wrote in message news:d7d2kq$1mc$1@digitaldaemon.com...
> The program above does not display "mystery" as expected.

It's already been reported and the fix will go out in the next update.

Walter wrote:
> "zwang" <nehzgnaw@gmail.com> wrote in message
> news:d7d2kq$1mc$1@digitaldaemon.com...
> 
>>The program above does not display "mystery" as expected.
> 
> 
> It's already been reported and the fix will go out in the next update.
> 
> 

Great! I'm wondering where the bug lurks.