Fraser Adams commented on PROTON-488:

Hey Cliff,
For info my JavaScript port of Proton got bitten by varargs. What I was seeing 
was that the AMQP Address wasn't getting passed from the producer to the 
consumer and I traced it to the 'z' encoding passing a structure.

In my case I was actually using LLVM - the C to JavaScript compiler emscripten 
used LLVM front ends and the default one is le32 (generic 32 bit little endian) 
from what I've been able to tell that front end has a bug/quirk in its varag 
handling, when I replaced that with "i386-pc-linux-gnu" as a front end it 
worked, but it requires an environment variable change to do that, which is a 
pain in CMake.

>From casually looking at your patch I *think* that it might cleanly sort out 
>what I've been seeing with LLVM too, though I'd need to check.

> Windows 7 64-bit VS2010 qpid-proton Crash on Startup with Send / Recv 
> Application
> ---------------------------------------------------------------------------------
>                 Key: PROTON-488
>                 URL: https://issues.apache.org/jira/browse/PROTON-488
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: proton-c
>    Affects Versions: 0.6
>         Environment: Windows 7 64-bit VS 2010
>            Reporter: Frank Quinn
>            Assignee: Cliff Jansen
>            Priority: Critical
>         Attachments: PROTON-488-0.patch, qpid-proton-win64-send-crash.png
> Steps to recreate:
> 1. Grab latest 0.6 tarball
> 2. Start up Visual Studio x64 Win64 Command Prompt (2010) and run "cmake ." 
> to generate the visual studio files
> 3. Open Up the newly created Proton.sln in VS2010, right click on qpid-proton 
> and add the path to python to executable directories
> 4. In the configuration manager, select qpid-proton and select active 
> configuration to be Debug, then select "Add" to add x64 support, copying 
> win32 configuration in the process.
> 5. Select qpid-proton properties and remove the hard coded /machine:X86 extra 
> command lines in Linker -> Command Line (MACHINE:X64 should already be in the 
> command line above so no need to add here)
> 6. Right click on qpid-proton and select build
> Repeat steps 3-6 for send / recv applications. When you run recv, then run 
> send, you'll get a crash with the (soon to be attached) trace.
> Cheers,
> Frank

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