Fix CI: use ulimit -s unlimited instead of RUST_MIN_STACK

RUST_MIN_STACK is not respected by the pre-compiled nargo binary.
Use ulimit -s unlimited to raise the OS stack size limit before
running aztec compile/test commands.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: critesjosh

.github/workflows/note-send-proof-tests.yml

@@ -68,9 +68,9 @@ jobs:
 
       - name: Compile contract and generate artifacts
         working-directory: note-send-proof
-        env:
-          RUST_MIN_STACK: "8388608"
-        run: script -e -c "yarn ccc"
+        run: |
+          ulimit -s unlimited
+          script -e -c "yarn ccc"
 
       - name: Generate note hash data
         working-directory: note-send-proof

.github/workflows/prediction-market-tests.yml

@@ -70,16 +70,15 @@ jobs:
 
       - name: Run Noir unit tests
         working-directory: prediction-market
-        env:
-          RUST_MIN_STACK: "8388608"
-        run: script -e -c "aztec test"
+        run: |
+          ulimit -s unlimited
+          script -e -c "aztec test"
         timeout-minutes: 10
 
       - name: Compile contract and generate artifacts
         working-directory: prediction-market
-        env:
-          RUST_MIN_STACK: "8388608"
         run: |
+          ulimit -s unlimited
           script -e -c "aztec compile"
           script -e -c "aztec codegen target -o artifacts"
 

.github/workflows/recursive-verification-tests.yml

@@ -79,9 +79,9 @@ jobs:
 
       - name: Compile contract and generate artifacts
         working-directory: recursive_verification
-        env:
-          RUST_MIN_STACK: "8388608"
-        run: script -e -c "yarn ccc"
+        run: |
+          ulimit -s unlimited
+          script -e -c "yarn ccc"
 
       - name: Generate proof data
         working-directory: recursive_verification