From 82905b028db4a76b2f3924ace290a6f3ddc6c558 Mon Sep 17 00:00:00 2001
From: PanGan21 <panagiotis.ganelis@zama.ai>
Date: Tue, 10 Mar 2026 17:06:28 +0100
Subject: [PATCH 1/7] feat(ci): add llvm-cov in ci

---
 .github/workflows/coprocessor-cargo-tests.yml | 27 ++++++++++++++++---
 .github/workflows/kms-connector-tests.yml     | 20 +++++++++++---
 .github/workflows/sdk-rust-sdk-tests.yml      | 20 +++++++++++---
 ci/coverage-thresholds.json                   |  5 ++++
 coprocessor/fhevm-engine/Cargo.toml           |  5 ++++
 coprocessor/fhevm-engine/rust-toolchain.toml  |  1 +
 kms-connector/rust-toolchain.toml             |  1 +
 7 files changed, 69 insertions(+), 10 deletions(-)
 create mode 100644 ci/coverage-thresholds.json

diff --git a/.github/workflows/coprocessor-cargo-tests.yml b/.github/workflows/coprocessor-cargo-tests.yml
index 0947dbd104..46ad9d9041 100644
--- a/.github/workflows/coprocessor-cargo-tests.yml
+++ b/.github/workflows/coprocessor-cargo-tests.yml
@@ -31,6 +31,7 @@ jobs:
               - .github/workflows/coprocessor-cargo-tests.yml
               - coprocessor/fhevm-engine/**
               - coprocessor/proto/**
+              - ci/coverage-thresholds.json
   cargo-tests:
     name: coprocessor-cargo-test/cargo-tests (bpr)
     needs: check-changes
@@ -54,6 +55,12 @@ jobs:
       uses: dtolnay/rust-toolchain@a54c7afa936fefeb4456b2dd8068152669aa8203
       with:
         toolchain: stable
+        components: llvm-tools-preview
+
+    - name: Install cargo-llvm-cov
+      uses: taiki-e/install-action@a37010ded18ff788be4440302bd6830b1ae50d8b # v2.68.25
+      with:
+        tool: cargo-llvm-cov
 
     - name: Install cargo dependencies
       run: |
@@ -71,8 +78,8 @@ jobs:
           ~/.cargo/registry
           ~/.cargo/git
           target
-        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-        restore-keys: ${{ runner.os }}-cargo-
+        key: ${{ runner.os }}-cargo-coverage-${{ hashFiles('**/Cargo.lock') }}
+        restore-keys: ${{ runner.os }}-cargo-coverage-
 
     - name: Login to GitHub Container Registry
       uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
@@ -101,7 +108,19 @@ jobs:
       run: |
         docker run --rm -d -p 4566:4566 --name localstack localstack/localstack:latest
 
-    - name: Run tests
+    - name: Run tests with coverage
+      run: |
+        DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \
+        TEST_GLOBAL_LOCALSTACK=1 \
+        cargo llvm-cov --workspace --profile coverage -- --test-threads=1
+      working-directory: coprocessor/fhevm-engine
+
+    - name: Coverage summary
+      if: always()
       run: |
-        DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor TEST_GLOBAL_LOCALSTACK=1 cargo test --release -- --test-threads=1
+        echo '## Coverage: coprocessor/fhevm-engine' >> "$GITHUB_STEP_SUMMARY"
+        echo '```' >> "$GITHUB_STEP_SUMMARY"
+        DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \
+        cargo llvm-cov report --workspace --profile coverage >> "$GITHUB_STEP_SUMMARY" 2>/dev/null || echo 'No coverage data available' >> "$GITHUB_STEP_SUMMARY"
+        echo '```' >> "$GITHUB_STEP_SUMMARY"
       working-directory: coprocessor/fhevm-engine
diff --git a/.github/workflows/kms-connector-tests.yml b/.github/workflows/kms-connector-tests.yml
index 2e9a75464e..fed131f845 100644
--- a/.github/workflows/kms-connector-tests.yml
+++ b/.github/workflows/kms-connector-tests.yml
@@ -41,6 +41,7 @@ jobs:
             - kms-connector/Cargo.*
             - gateway-contracts/rust-bindings/**
             - host-contracts/rust-bindings/**
+            - ci/coverage-thresholds.json
 
   start-runner:
     name: kms-connector-tests/start-runner
@@ -105,7 +106,12 @@ jobs:
         uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
           toolchain: stable
-          components: rustfmt, clippy
+          components: rustfmt, clippy, llvm-tools-preview
+
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@a37010ded18ff788be4440302bd6830b1ae50d8b # v2.68.25
+        with:
+          tool: cargo-llvm-cov
 
       - name: Install Protoc
         uses: arduino/setup-protoc@c65c819552d16ad3c9b72d9dfd5ba5237b9c906b # v3.0.0
@@ -124,11 +130,19 @@ jobs:
       - name: Linting
         run: cargo clippy --all-targets --all-features -- -D warnings
 
-      - name: Run Tests
+      - name: Run Tests with coverage
         env:
           BLOCKCHAIN_ACTIONS_TOKEN: ${{ secrets.BLOCKCHAIN_ACTIONS_TOKEN }}
         run: |
-          RUST_BACKTRACE=full cargo test
+          RUST_BACKTRACE=full cargo llvm-cov --workspace
+
+      - name: Coverage summary
+        if: always()
+        run: |
+          echo '## Coverage: kms-connector' >> "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
+          cargo llvm-cov report --workspace >> "$GITHUB_STEP_SUMMARY" 2>/dev/null || echo 'No coverage data available' >> "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
 
   stop-runner:
     name: kms-connector-tests/stop-runner
diff --git a/.github/workflows/sdk-rust-sdk-tests.yml b/.github/workflows/sdk-rust-sdk-tests.yml
index 2150510172..c132fb9327 100644
--- a/.github/workflows/sdk-rust-sdk-tests.yml
+++ b/.github/workflows/sdk-rust-sdk-tests.yml
@@ -39,6 +39,7 @@ jobs:
             - 'sdk/rust-sdk/examples/**'
             - 'sdk/rust-sdk/Cargo.toml'
             - gateway-contracts/rust-bindings/**
+            - ci/coverage-thresholds.json
 
   start-runner:
     name: sdk-rust-sdk-tests/start-runner
@@ -103,7 +104,12 @@ jobs:
         uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
           toolchain: stable
-          components: rustfmt, clippy
+          components: rustfmt, clippy, llvm-tools-preview
+
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@a37010ded18ff788be4440302bd6830b1ae50d8b # v2.68.25
+        with:
+          tool: cargo-llvm-cov
 
       - name: Install Protoc
         uses: arduino/setup-protoc@c65c819552d16ad3c9b72d9dfd5ba5237b9c906b # v3.0.0
@@ -127,11 +133,19 @@ jobs:
         run: |
           RUST_BACKTRACE=full cargo run --example keygen
 
-      - name: Run Tests
+      - name: Run Tests with coverage
         env:
           BLOCKCHAIN_ACTIONS_TOKEN: ${{ secrets.BLOCKCHAIN_ACTIONS_TOKEN }}
         run: |
-          RUST_BACKTRACE=full cargo test
+          RUST_BACKTRACE=full cargo llvm-cov
+
+      - name: Coverage summary
+        if: always()
+        run: |
+          echo '## Coverage: sdk/rust-sdk' >> "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
+          cargo llvm-cov report >> "$GITHUB_STEP_SUMMARY" 2>/dev/null || echo 'No coverage data available' >> "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
 
       - name: Run Examples
         env:
diff --git a/ci/coverage-thresholds.json b/ci/coverage-thresholds.json
new file mode 100644
index 0000000000..2b141d0307
--- /dev/null
+++ b/ci/coverage-thresholds.json
@@ -0,0 +1,5 @@
+{
+  "coprocessor/fhevm-engine": 40,
+  "kms-connector": 50,
+  "sdk/rust-sdk": 60
+}
diff --git a/coprocessor/fhevm-engine/Cargo.toml b/coprocessor/fhevm-engine/Cargo.toml
index 433b56a5a5..0b31345784 100644
--- a/coprocessor/fhevm-engine/Cargo.toml
+++ b/coprocessor/fhevm-engine/Cargo.toml
@@ -111,3 +111,8 @@ inherits = "release"
 opt-level = 1
 lto = false
 codegen-units = 16
+
+[profile.coverage]
+inherits = "release"
+lto = false
+codegen-units = 16
diff --git a/coprocessor/fhevm-engine/rust-toolchain.toml b/coprocessor/fhevm-engine/rust-toolchain.toml
index d6d3381977..32d69cb59b 100644
--- a/coprocessor/fhevm-engine/rust-toolchain.toml
+++ b/coprocessor/fhevm-engine/rust-toolchain.toml
@@ -1,2 +1,3 @@
 [toolchain]
 channel = "1.91.1"
+components = ["llvm-tools-preview"]
diff --git a/kms-connector/rust-toolchain.toml b/kms-connector/rust-toolchain.toml
index f19782d3c5..30102b6c54 100644
--- a/kms-connector/rust-toolchain.toml
+++ b/kms-connector/rust-toolchain.toml
@@ -1,2 +1,3 @@
 [toolchain]
 channel = "1.92.0"
+components = ["llvm-tools-preview"]

From 10ae4e88cc9b8c51cf2f5a6a103fd6ea8d0310e0 Mon Sep 17 00:00:00 2001
From: PanGan21 <panagiotis.ganelis@zama.ai>
Date: Tue, 10 Mar 2026 17:11:17 +0100
Subject: [PATCH 2/7] feat(ci): set coverage threshold to 60

---
 ci/coverage-thresholds.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ci/coverage-thresholds.json b/ci/coverage-thresholds.json
index 2b141d0307..fed0ed4a3a 100644
--- a/ci/coverage-thresholds.json
+++ b/ci/coverage-thresholds.json
@@ -1,5 +1,5 @@
 {
-  "coprocessor/fhevm-engine": 40,
-  "kms-connector": 50,
+  "coprocessor/fhevm-engine": 60,
+  "kms-connector": 60,
   "sdk/rust-sdk": 60
 }

From af7a1fdcc5297422a6ea54c3561f80b63fd5c17e Mon Sep 17 00:00:00 2001
From: PanGan21 <panagiotis.ganelis@zama.ai>
Date: Tue, 10 Mar 2026 17:35:42 +0100
Subject: [PATCH 3/7] fix(common): remove coverage thresholds, use opt level 1,
 apply coverage only on coprocessor

---
 .github/workflows/coprocessor-cargo-tests.yml | 16 +++++++++------
 .github/workflows/kms-connector-tests.yml     | 20 +++----------------
 .github/workflows/sdk-rust-sdk-tests.yml      | 20 +++----------------
 ci/coverage-thresholds.json                   |  5 -----
 coprocessor/fhevm-engine/Cargo.toml           |  2 ++
 kms-connector/rust-toolchain.toml             |  1 -
 6 files changed, 18 insertions(+), 46 deletions(-)
 delete mode 100644 ci/coverage-thresholds.json

diff --git a/.github/workflows/coprocessor-cargo-tests.yml b/.github/workflows/coprocessor-cargo-tests.yml
index 46ad9d9041..78f1b5648f 100644
--- a/.github/workflows/coprocessor-cargo-tests.yml
+++ b/.github/workflows/coprocessor-cargo-tests.yml
@@ -31,7 +31,6 @@ jobs:
               - .github/workflows/coprocessor-cargo-tests.yml
               - coprocessor/fhevm-engine/**
               - coprocessor/proto/**
-              - ci/coverage-thresholds.json
   cargo-tests:
     name: coprocessor-cargo-test/cargo-tests (bpr)
     needs: check-changes
@@ -54,7 +53,7 @@ jobs:
     - name: Setup Rust
       uses: dtolnay/rust-toolchain@a54c7afa936fefeb4456b2dd8068152669aa8203
       with:
-        toolchain: stable
+        toolchain: "1.91.1"
         components: llvm-tools-preview
 
     - name: Install cargo-llvm-cov
@@ -119,8 +118,13 @@ jobs:
       if: always()
       run: |
         echo '## Coverage: coprocessor/fhevm-engine' >> "$GITHUB_STEP_SUMMARY"
-        echo '```' >> "$GITHUB_STEP_SUMMARY"
-        DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \
-        cargo llvm-cov report --workspace --profile coverage >> "$GITHUB_STEP_SUMMARY" 2>/dev/null || echo 'No coverage data available' >> "$GITHUB_STEP_SUMMARY"
-        echo '```' >> "$GITHUB_STEP_SUMMARY"
+        REPORT=$(DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \
+          cargo llvm-cov report --workspace --profile coverage 2>/dev/null) || true
+        if [ -n "$REPORT" ]; then
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
+          echo "$REPORT" >> "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
+        else
+          echo '*No coverage data available (tests may have failed before producing profiling data).*' >> "$GITHUB_STEP_SUMMARY"
+        fi
       working-directory: coprocessor/fhevm-engine
diff --git a/.github/workflows/kms-connector-tests.yml b/.github/workflows/kms-connector-tests.yml
index fed131f845..2e9a75464e 100644
--- a/.github/workflows/kms-connector-tests.yml
+++ b/.github/workflows/kms-connector-tests.yml
@@ -41,7 +41,6 @@ jobs:
             - kms-connector/Cargo.*
             - gateway-contracts/rust-bindings/**
             - host-contracts/rust-bindings/**
-            - ci/coverage-thresholds.json
 
   start-runner:
     name: kms-connector-tests/start-runner
@@ -106,12 +105,7 @@ jobs:
         uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
           toolchain: stable
-          components: rustfmt, clippy, llvm-tools-preview
-
-      - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@a37010ded18ff788be4440302bd6830b1ae50d8b # v2.68.25
-        with:
-          tool: cargo-llvm-cov
+          components: rustfmt, clippy
 
       - name: Install Protoc
         uses: arduino/setup-protoc@c65c819552d16ad3c9b72d9dfd5ba5237b9c906b # v3.0.0
@@ -130,19 +124,11 @@ jobs:
       - name: Linting
         run: cargo clippy --all-targets --all-features -- -D warnings
 
-      - name: Run Tests with coverage
+      - name: Run Tests
         env:
           BLOCKCHAIN_ACTIONS_TOKEN: ${{ secrets.BLOCKCHAIN_ACTIONS_TOKEN }}
         run: |
-          RUST_BACKTRACE=full cargo llvm-cov --workspace
-
-      - name: Coverage summary
-        if: always()
-        run: |
-          echo '## Coverage: kms-connector' >> "$GITHUB_STEP_SUMMARY"
-          echo '```' >> "$GITHUB_STEP_SUMMARY"
-          cargo llvm-cov report --workspace >> "$GITHUB_STEP_SUMMARY" 2>/dev/null || echo 'No coverage data available' >> "$GITHUB_STEP_SUMMARY"
-          echo '```' >> "$GITHUB_STEP_SUMMARY"
+          RUST_BACKTRACE=full cargo test
 
   stop-runner:
     name: kms-connector-tests/stop-runner
diff --git a/.github/workflows/sdk-rust-sdk-tests.yml b/.github/workflows/sdk-rust-sdk-tests.yml
index c132fb9327..2150510172 100644
--- a/.github/workflows/sdk-rust-sdk-tests.yml
+++ b/.github/workflows/sdk-rust-sdk-tests.yml
@@ -39,7 +39,6 @@ jobs:
             - 'sdk/rust-sdk/examples/**'
             - 'sdk/rust-sdk/Cargo.toml'
             - gateway-contracts/rust-bindings/**
-            - ci/coverage-thresholds.json
 
   start-runner:
     name: sdk-rust-sdk-tests/start-runner
@@ -104,12 +103,7 @@ jobs:
         uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
           toolchain: stable
-          components: rustfmt, clippy, llvm-tools-preview
-
-      - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@a37010ded18ff788be4440302bd6830b1ae50d8b # v2.68.25
-        with:
-          tool: cargo-llvm-cov
+          components: rustfmt, clippy
 
       - name: Install Protoc
         uses: arduino/setup-protoc@c65c819552d16ad3c9b72d9dfd5ba5237b9c906b # v3.0.0
@@ -133,19 +127,11 @@ jobs:
         run: |
           RUST_BACKTRACE=full cargo run --example keygen
 
-      - name: Run Tests with coverage
+      - name: Run Tests
         env:
           BLOCKCHAIN_ACTIONS_TOKEN: ${{ secrets.BLOCKCHAIN_ACTIONS_TOKEN }}
         run: |
-          RUST_BACKTRACE=full cargo llvm-cov
-
-      - name: Coverage summary
-        if: always()
-        run: |
-          echo '## Coverage: sdk/rust-sdk' >> "$GITHUB_STEP_SUMMARY"
-          echo '```' >> "$GITHUB_STEP_SUMMARY"
-          cargo llvm-cov report >> "$GITHUB_STEP_SUMMARY" 2>/dev/null || echo 'No coverage data available' >> "$GITHUB_STEP_SUMMARY"
-          echo '```' >> "$GITHUB_STEP_SUMMARY"
+          RUST_BACKTRACE=full cargo test
 
       - name: Run Examples
         env:
diff --git a/ci/coverage-thresholds.json b/ci/coverage-thresholds.json
deleted file mode 100644
index fed0ed4a3a..0000000000
--- a/ci/coverage-thresholds.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "coprocessor/fhevm-engine": 60,
-  "kms-connector": 60,
-  "sdk/rust-sdk": 60
-}
diff --git a/coprocessor/fhevm-engine/Cargo.toml b/coprocessor/fhevm-engine/Cargo.toml
index 0b31345784..afa5c0e0be 100644
--- a/coprocessor/fhevm-engine/Cargo.toml
+++ b/coprocessor/fhevm-engine/Cargo.toml
@@ -114,5 +114,7 @@ codegen-units = 16
 
 [profile.coverage]
 inherits = "release"
+opt-level = 1
 lto = false
+debug = 1
 codegen-units = 16
diff --git a/kms-connector/rust-toolchain.toml b/kms-connector/rust-toolchain.toml
index 30102b6c54..f19782d3c5 100644
--- a/kms-connector/rust-toolchain.toml
+++ b/kms-connector/rust-toolchain.toml
@@ -1,3 +1,2 @@
 [toolchain]
 channel = "1.92.0"
-components = ["llvm-tools-preview"]

From 2fdb5943afef6d884e5d74aa591b2678688584a6 Mon Sep 17 00:00:00 2001
From: PanGan21 <panagiotis.ganelis@zama.ai>
Date: Tue, 10 Mar 2026 17:42:10 +0100
Subject: [PATCH 4/7] fix(coprocessor): lint workflow

---
 .github/workflows/coprocessor-cargo-tests.yml | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/coprocessor-cargo-tests.yml b/.github/workflows/coprocessor-cargo-tests.yml
index 78f1b5648f..e8c62cb7af 100644
--- a/.github/workflows/coprocessor-cargo-tests.yml
+++ b/.github/workflows/coprocessor-cargo-tests.yml
@@ -117,14 +117,16 @@ jobs:
     - name: Coverage summary
       if: always()
       run: |
-        echo '## Coverage: coprocessor/fhevm-engine' >> "$GITHUB_STEP_SUMMARY"
         REPORT=$(DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \
           cargo llvm-cov report --workspace --profile coverage 2>/dev/null) || true
-        if [ -n "$REPORT" ]; then
-          echo '```' >> "$GITHUB_STEP_SUMMARY"
-          echo "$REPORT" >> "$GITHUB_STEP_SUMMARY"
-          echo '```' >> "$GITHUB_STEP_SUMMARY"
-        else
-          echo '*No coverage data available (tests may have failed before producing profiling data).*' >> "$GITHUB_STEP_SUMMARY"
-        fi
+        {
+          echo '## Coverage: coprocessor/fhevm-engine'
+          if [ -n "$REPORT" ]; then
+            echo '```'
+            echo "$REPORT"
+            echo '```'
+          else
+            echo '*No coverage data available (tests may have failed before producing profiling data).*'
+          fi
+        } >> "$GITHUB_STEP_SUMMARY"
       working-directory: coprocessor/fhevm-engine

From 4ea96e1a2c7cc4bf72bb5ecd9e564bb310b47b71 Mon Sep 17 00:00:00 2001
From: PanGan21 <panagiotis.ganelis@zama.ai>
Date: Tue, 10 Mar 2026 20:43:33 +0100
Subject: [PATCH 5/7] fix(ci): capture cargo-llvm-cov report output by
 redirecting stderr

---
 .github/workflows/coprocessor-cargo-tests.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/coprocessor-cargo-tests.yml b/.github/workflows/coprocessor-cargo-tests.yml
index e8c62cb7af..2e0d58def8 100644
--- a/.github/workflows/coprocessor-cargo-tests.yml
+++ b/.github/workflows/coprocessor-cargo-tests.yml
@@ -111,14 +111,13 @@ jobs:
       run: |
         DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \
         TEST_GLOBAL_LOCALSTACK=1 \
-        cargo llvm-cov --workspace --profile coverage -- --test-threads=1
+        cargo llvm-cov --no-report --workspace --profile coverage -- --test-threads=1
       working-directory: coprocessor/fhevm-engine
 
-    - name: Coverage summary
+    - name: Generate coverage report
       if: always()
       run: |
-        REPORT=$(DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \
-          cargo llvm-cov report --workspace --profile coverage 2>/dev/null) || true
+        REPORT=$(cargo llvm-cov report --profile coverage 2>&1) || true
         {
           echo '## Coverage: coprocessor/fhevm-engine'
           if [ -n "$REPORT" ]; then
@@ -129,4 +128,5 @@ jobs:
             echo '*No coverage data available (tests may have failed before producing profiling data).*'
           fi
         } >> "$GITHUB_STEP_SUMMARY"
+        echo "$REPORT"
       working-directory: coprocessor/fhevm-engine

From 38dc0777e46efb0c3625634b571cb294c5624668 Mon Sep 17 00:00:00 2001
From: PanGan21 <panagiotis.ganelis@zama.ai>
Date: Wed, 11 Mar 2026 10:06:27 +0100
Subject: [PATCH 6/7] fix(ci): fix warning

---
 .github/workflows/coprocessor-cargo-tests.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/coprocessor-cargo-tests.yml b/.github/workflows/coprocessor-cargo-tests.yml
index 2e0d58def8..97ef1e504c 100644
--- a/.github/workflows/coprocessor-cargo-tests.yml
+++ b/.github/workflows/coprocessor-cargo-tests.yml
@@ -107,6 +107,10 @@ jobs:
       run: |
         docker run --rm -d -p 4566:4566 --name localstack localstack/localstack:latest
 
+    - name: Clean previous coverage data
+      run: cargo llvm-cov clean --workspace --profile coverage
+      working-directory: coprocessor/fhevm-engine
+
     - name: Run tests with coverage
       run: |
         DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \

From b610ebf2bd48fd3d2ec2f9484c9bd3fdec09bd0a Mon Sep 17 00:00:00 2001
From: PanGan21 <panagiotis.ganelis@zama.ai>
Date: Wed, 11 Mar 2026 14:04:40 +0100
Subject: [PATCH 7/7] fix(ci): handle failed generated report

---
 .github/workflows/coprocessor-cargo-tests.yml | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/coprocessor-cargo-tests.yml b/.github/workflows/coprocessor-cargo-tests.yml
index 97ef1e504c..4b9c5fef2a 100644
--- a/.github/workflows/coprocessor-cargo-tests.yml
+++ b/.github/workflows/coprocessor-cargo-tests.yml
@@ -121,7 +121,13 @@ jobs:
     - name: Generate coverage report
       if: always()
       run: |
-        REPORT=$(cargo llvm-cov report --profile coverage 2>&1) || true
+        if cargo llvm-cov report --profile coverage > /tmp/cov-report.txt 2>&1; then
+          REPORT=$(cat /tmp/cov-report.txt)
+        else
+          echo "cargo llvm-cov report failed:"
+          cat /tmp/cov-report.txt
+          REPORT=""
+        fi
         {
           echo '## Coverage: coprocessor/fhevm-engine'
           if [ -n "$REPORT" ]; then