ci : try to enable memory leak detection for Mac

Author: ggerganov

.github/workflows/build.yml

@@ -88,6 +88,7 @@ jobs:
             -DGGML_METAL_SHADER_DEBUG=ON \
             -DGGML_RPC=ON
           cmake --build build --config Release -j $(sysctl -n hw.logicalcpu)
+          leaks -atExit -- ./build/bin/test-thread-safety -hf ggml-org/gemma-3-270m-qat-GGUF -ngl 99 -p "$(printf 'hello %.0s' {1..128})" -n 16 -c 512 -ub 32 -np 2 -t 2 -lv 1
 
       - name: Test
         id: cmake_test

ggml/src/ggml-metal/ggml-metal.m

@@ -1705,7 +1705,9 @@ @implementation GGMLMetalClass
             return res;
         }
 
-        return ggml_metal_compile_kernel(backend, base, name, nil);
+        MTLFunctionConstantValues * cv = [[MTLFunctionConstantValues alloc] init];
+
+        return ggml_metal_compile_kernel(backend, base, name, cv);
     }
 }