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digitalmars.D - Oddness with C binding

reply "James Miller" <james aatch.net> writes:
I'm writing bindings to XCB right now, and its mostly going 
smoothly. However I have encountered a very strange problem.

This bit of code segfaults with DMD:

     auto connection = xcb_connect(null, null);

     auto setup = xcb_get_setup(connection);
     auto iter = xcb_setup_roots_iterator(setup);

     auto screen = iter.data;

But it doesn't segfault with LDC2. This is odd to me because as 
far as I am aware LDC2 uses the same front end at DMD. This must 
mean that there is a bug in the dmd backend.

I thought it could be related to const optimizations, but I 
removed all the const declarations from the appropriate C 
bindings and the same thing happened.

I don't have the time to create a minimal test case for this, so 
I can't really file a bug report on it. I was also wondering what 
could cause this problem. I am using dmd 2.059 and the latest ldc 
from the arch repositories.

--
James Miller
May 02 2012
next sibling parent Don Clugston <dac nospam.com> writes:
On 03/05/12 06:28, James Miller wrote:

 I'm writing bindings to XCB right now, and its mostly going smoothly.
 However I have encountered a very strange problem.

 This bit of code segfaults with DMD:

 auto connection = xcb_connect(null, null);

 auto setup = xcb_get_setup(connection);
 auto iter = xcb_setup_roots_iterator(setup);

 auto screen = iter.data;

 But it doesn't segfault with LDC2. This is odd to me because as far as I
 am aware LDC2 uses the same front end at DMD. This must mean that there
 is a bug in the dmd backend.

 I thought it could be related to const optimizations, but I removed all
 the const declarations from the appropriate C bindings and the same
 thing happened.

 I don't have the time to create a minimal test case for this, so I can't
 really file a bug report on it. I was also wondering what could cause
 this problem. I am using dmd 2.059 and the latest ldc from the arch
 repositories.

 --
 James Miller


The infamous bug 5570?
May 02 2012
prev sibling parent Shahid <govellius gmail.com> writes:
I was blocked by Issue 5570 (DMD64), here was the progress I made before 
giving up https://gist.github.com/1131642
May 03 2012