Hello. First of all I'm really sorry if this is the wrong mailing list to post to, webkit-help would have probably been better but it doesn't seem very active. I run into some problems while trying to use the dump-class-layout script (found in Tools/Scripts/). I built WebKit using the build-webkit script with the --debug flag. After building, I tried to run the dump-class-layout script with the following arguments: ./Tools/Scripts/dump-class-layout --architecture=x86_64 -c Debug JavaScriptCore JSString I also tried different frameworks and classes. The script always fails telling me that "no type matches x in y" where x is the class name I used in the run and y is the framework name. Why is this happening? The script is correctly finding the built and symbolicated framework image, so why is it not working properly? Thanks in advance.