• Geoff Hickey (23/23) Dec 02 2004 This is somewhat obscure, but if you have a switch statement with a stru...
• Thomas Kuehne (15/18) Dec 03 2004 -----BEGIN PGP SIGNED MESSAGE-----
• Simon Buchan (14/34) Dec 03 2004 Sounds like someone's going to be reducing this... (DMD sure has a lot
• Thomas Kuehne (23/28) Dec 03 2004 -----BEGIN PGP SIGNED MESSAGE-----
• Walter (4/4) Dec 04 2004 It's fixed now. The compiler now puts out:

Geoff Hickey <Geoff_member pathlink.com> writes:

This is somewhat obscure, but if you have a switch statement with a structure
member as the expression, and you have an undefined identifier in one of your
case  statements, the compiler will crash after reporting the error.

Here's code to reproduce the problem (WinXP, DMD 0.108): (sorry about the
formatting, but I haven't figured out how to get the Direct Read Newsreader to
preserve indents).

struct test
{
uint a;
uint b;
}

int main()
{
test tv;
tv.a = 1;

switch( tv.a )
{
case UNDEF_VALUE:
break;
}

return 0;
}


- Geoff Hickey

Thomas Kuehne <thomas-dloop kuehne.thisisspam.cn> writes:

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Geoff Hickey schrieb am Fri, 3 Dec 2004 00:52:23 +0000 (UTC):
 This is somewhat obscure, but if you have a switch statement with a structure
 member as the expression, and you have an undefined identifier in one of your
 case  statements, the compiler will crash after reporting the error.

This is interesting: if the struct member is an uint the compiler
segfaults, if the struct member is an int the compiler doesn't segfault.

Added to DStress as
http://svn.kuehne.cn/dstress/nocompile/bug_20041203_A.d
http://svn.kuehne.cn/dstress/nocompile/bug_20041203_B.d

Thomas

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"Simon Buchan" <currently no.where> writes:

On Fri, 3 Dec 2004 14:14:41 +0100, Thomas Kuehne  
<thomas-dloop kuehne.thisisspam.cn> wrote:

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 Hash: SHA1

 Geoff Hickey schrieb am Fri, 3 Dec 2004 00:52:23 +0000 (UTC):
 This is somewhat obscure, but if you have a switch statement with a  
 structure
 member as the expression, and you have an undefined identifier in one  
 of your
 case  statements, the compiler will crash after reporting the error.

 This is interesting: if the struct member is an uint the compiler
 segfaults, if the struct member is an int the compiler doesn't segfault.

 Added to DStress as
 http://svn.kuehne.cn/dstress/nocompile/bug_20041203_A.d
 http://svn.kuehne.cn/dstress/nocompile/bug_20041203_B.d

 Thomas

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 pfTQZI3MYHF70am1ke/TQ/k=
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Sounds like someone's going to be reducing this... (DMD sure has a lot
of really weird bugs, doesn't it?)

-- 
"Unhappy Microsoft customers have a funny way of becoming Linux,
Salesforce.com and Oracle customers." - www.microsoft-watch.com:
"The Year in Review: Microsoft Opens Up"

"Changes/Additions
--------------------------------------------------------------------------------
HL2DM released! "
- HL2DM changelog

- ME

Thomas Kuehne <thomas-dloop kuehne.thisisspam.cn> writes:

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 This is somewhat obscure, but if you have a switch statement with a
 structure
 member as the expression, and you have an undefined identifier in one
 of your
 case  statements, the compiler will crash after reporting the error.



at least part of the problem can be resolved:

--- expression.org.c    2004-12-03 19:56:15.504405552 +0100
+++ expression.c        2004-12-03 19:56:27.577570152 +0100
   -391,7 +391,7   
 integer_t Expression::toInteger()
 {
     //printf("Expression %s\n", Token::toChars(op));
-*(char*)0=0;
+    //*(char*)0=0;
     error("Integer constant expression expected instead of %s",
toChars());
     return 0;
 }


Thomas


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"Walter" <newshound digitalmars.com> writes:

It's fixed now. The compiler now puts out:

test.d(14): undefined identifier UNDEF_VALUE
test.d(14): Integer constant expression expected instead of UNDEF_VALUE

as it should.