Add ARM64 ASan build to debug segfaults in USDC timesamples parsing

Build with AddressSanitizer enabled on ARM64 runner to help identify
the root cause of segmentation faults in timesamples USDC file parsing.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/linux_ci.yml

@@ -116,6 +116,35 @@ jobs:
     - name: tests
       run: cd build && ctest --output-on-failure
 
+  # ARM64 ASan build to debug segfaults
+  build-arm64-asan:
+
+    runs-on: ubuntu-24.04-arm
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: prep
+      run: |
+        lscpu
+        cat /proc/cpuinfo
+    - name: configure
+      run: CXX=clang++ CC=clang ./scripts/bootstrap-cmake-linux-asan.sh
+    - name: make
+      run: cd build_asan && make -j4
+
+    # Dedicated USDC tests for files that have shown issues on ARM64
+    - name: test usdc timesamples files with ASan
+      run: |
+        echo "Testing USDC timesamples files with tusdcat (ASan enabled)..."
+        ./build_asan/tusdcat tests/usdc/timesamples-array-vec2f-001.usdc
+        ./build_asan/tusdcat tests/usdc/timesamples-array-float-001.usdc
+        ./build_asan/tusdcat tests/usdc/timesamples-array-int-001.usdc
+        ./build_asan/tusdcat tests/usdc/timesamples-array-dedup-002.usdc
+        ./build_asan/tusdcat tests/usdc/timesamples-array-dedup-001.usdc
+        ./build_asan/tusdcat tests/usdc/timesamples-array-double-001.usdc
+        echo "All USDC timesamples tests passed."
+
   build-arm64-gcc:
 
     runs-on: ubuntu-24.04-arm