diff --git a/.github/workflows/linux_ci.yml b/.github/workflows/linux_ci.yml
index b2ce4756..83e7da07 100644
--- a/.github/workflows/linux_ci.yml
+++ b/.github/workflows/linux_ci.yml
@@ -156,8 +156,12 @@ jobs:
       run: |
         lscpu
         cat /proc/cpuinfo
-    - name: configure
-      run: CXX=g++ CC=gcc ./scripts/bootstrap-cmake-linux.sh
+    - name: install gdb
+      run: sudo apt-get update && sudo apt-get install -y gdb
+    - name: configure with debug
+      run: |
+        mkdir -p build
+        cd build && CXX=g++ CC=gcc cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_VERBOSE_MAKEFILE=1 ..
     - name: make
       run: cd build && make
 
@@ -168,40 +172,24 @@ jobs:
         path: build/tusdcat
         retention-days: 7
 
-    # Dedicated USDC tests for files that have shown issues on ARM64
-    - name: test usdc timesamples files
+    # Dedicated USDC tests for files that have shown issues on ARM64 - run under gdb to catch segfault
+    - name: test usdc timesamples files with gdb
       run: |
-        echo "Testing USDC timesamples files with tusdcat..."
-        ./build/tusdcat tests/usdc/timesamples-array-vec2f-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-float-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-int-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-dedup-002.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-dedup-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-double-001.usdc
-        echo "All USDC timesamples tests passed."
+        echo "Testing USDC timesamples files with tusdcat under gdb..."
+        for f in tests/usdc/timesamples-array-vec2f-001.usdc \
+                 tests/usdc/timesamples-array-float-001.usdc \
+                 tests/usdc/timesamples-array-int-001.usdc \
+                 tests/usdc/timesamples-array-dedup-002.usdc \
+                 tests/usdc/timesamples-array-dedup-001.usdc \
+                 tests/usdc/timesamples-array-double-001.usdc; do
+          echo "=== Testing $f ==="
+          gdb -batch -ex "run" -ex "bt full" -ex "quit" --args ./build/tusdcat "$f"
+        done
+        echo "All USDC timesamples tests completed."
 
     - name: tests
       run: cd build && ctest --output-on-failure
 
-    # Dedicated USDC tests for files that have shown issues on ARM64
-    - name: test usdc timesamples files
-      run: |
-        echo "Testing USDC timesamples files with tusdcat..."
-        ./build/tusdcat tests/usdc/timesamples-array-vec2f-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-float-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-int-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-dedup-002.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-dedup-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-double-001.usdc
-        echo "All USDC timesamples tests passed."
-
-    - name: Upload ARM64 tusdcat binary
-      uses: actions/upload-artifact@v4
-      with:
-        name: tusdcat-linux-arm64-gcc
-        path: build/tusdcat
-        retention-days: 7
-
   build-arm64-clang:
 
     runs-on: ubuntu-24.04-arm
@@ -214,14 +202,16 @@ jobs:
         lscpu
         cat /proc/cpuinfo
     # Install recent Clang from LLVM apt repository
-    - name: install clang-21
+    - name: install clang-21 and lldb
       run: |
         wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc
         sudo add-apt-repository -y "deb http://apt.llvm.org/noble/ llvm-toolchain-noble-21 main"
         sudo apt-get update
-        sudo apt-get install -y clang-21
-    - name: configure
-      run: CXX=clang++-21 CC=clang-21 ./scripts/bootstrap-cmake-linux.sh
+        sudo apt-get install -y clang-21 lldb-21
+    - name: configure with debug
+      run: |
+        mkdir -p build
+        cd build && CXX=clang++-21 CC=clang-21 cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_VERBOSE_MAKEFILE=1 ..
     - name: make
       run: cd build && make
 
@@ -232,36 +222,20 @@ jobs:
         path: build/tusdcat
         retention-days: 7
 
-    # Dedicated USDC tests for files that have shown issues on ARM64
-    - name: test usdc timesamples files
+    # Dedicated USDC tests for files that have shown issues on ARM64 - run under lldb to catch segfault
+    - name: test usdc timesamples files with lldb
       run: |
-        echo "Testing USDC timesamples files with tusdcat..."
-        ./build/tusdcat tests/usdc/timesamples-array-vec2f-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-float-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-int-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-dedup-002.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-dedup-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-double-001.usdc
-        echo "All USDC timesamples tests passed."
+        echo "Testing USDC timesamples files with tusdcat under lldb..."
+        for f in tests/usdc/timesamples-array-vec2f-001.usdc \
+                 tests/usdc/timesamples-array-float-001.usdc \
+                 tests/usdc/timesamples-array-int-001.usdc \
+                 tests/usdc/timesamples-array-dedup-002.usdc \
+                 tests/usdc/timesamples-array-dedup-001.usdc \
+                 tests/usdc/timesamples-array-double-001.usdc; do
+          echo "=== Testing $f ==="
+          lldb-21 -b -o "run" -o "bt all" -o "quit" -- ./build/tusdcat "$f"
+        done
+        echo "All USDC timesamples tests completed."
 
     - name: tests
       run: cd build && ctest --output-on-failure
-
-    # Dedicated USDC tests for files that have shown issues on ARM64
-    - name: test usdc timesamples files
-      run: |
-        echo "Testing USDC timesamples files with tusdcat..."
-        ./build/tusdcat tests/usdc/timesamples-array-vec2f-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-float-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-int-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-dedup-002.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-dedup-001.usdc
-        ./build/tusdcat tests/usdc/timesamples-array-double-001.usdc
-        echo "All USDC timesamples tests passed."
-
-    - name: Upload ARM64 tusdcat binary
-      uses: actions/upload-artifact@v4
-      with:
-        name: tusdcat-linux-arm64-clang
-        path: build/tusdcat
-        retention-days: 7