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digitalmars.D.bugs - Segfault from changing a string

reply brad beveridge <brad nowhere.com> writes:
The following segfaults on Linux dmd - should it?

char[] test = "this is a test".dup; is OK

int main(char[][] args)
{
     char[] test = "this is a test";
     test[0] = 'T';
     return 0;
}

Brad
Apr 24 2005
parent reply =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb algonet.se> writes:
brad beveridge wrote:


 The following segfaults on Linux dmd - should it?


Yes, as it has read-only str literals...

This is mentioned in the very small print on the site:

http://www.digitalmars.com/d/dcompiler.html#linux
"Differences from Win32 version
  * String literals are read-only. Attempting to write to
    them will cause a segment violation.
  *  The configuration file is /etc/dmd.conf"


 char[] test = "this is a test".dup; is OK


This is the "correct" D code to use...
Strings should use Copy-On-Write (COW)

This second way will work with GDC too.

--anders
Apr 24 2005
parent brad beveridge <brad nowhere.com> writes:
 This is mentioned in the very small print on the site:
 
 http://www.digitalmars.com/d/dcompiler.html#linux
 "Differences from Win32 version
  * String literals are read-only. Attempting to write to
    them will cause a segment violation.
  *  The configuration file is /etc/dmd.conf"
 

 char[] test = "this is a test".dup; is OK


 
 
 This is the "correct" D code to use...
 Strings should use Copy-On-Write (COW)
 
 This second way will work with GDC too.
 
 --anders


Ah, that fine print does look familiar, but it's been a while since I 
read the whole D spec :)

Thank you Anders

Brad
Apr 24 2005