diff --git a/.github/actions/spelling/allow.txt b/.github/actions/spelling/allow.txt
index c7242e4585..bacbf2bd71 100644
--- a/.github/actions/spelling/allow.txt
+++ b/.github/actions/spelling/allow.txt
@@ -2180,3 +2180,4 @@ hpa
 CERI
 HIMMELP
 nuse
+nxbdi
diff --git a/.github/workflows/cmake_pi.yml b/.github/workflows/cmake_pi.yml
index ebc0fee594..fd7c59d355 100644
--- a/.github/workflows/cmake_pi.yml
+++ b/.github/workflows/cmake_pi.yml
@@ -76,13 +76,21 @@ jobs:
 
           # As of 20240316, CMake test fails on cobyla with the Classic flang, AOCC flang, and
           # nvfortran. See https://github.com/libprima/prima/issues/165
-          ctest --output-on-failure -V -E "stress|cobyla"
+          if [[ $FC == 'gfortran' ]] ; then
+              ctest --output-on-failure -V -E "stress"
+          else
+              ctest --output-on-failure -V -E "stress|cobyla"
+          fi
 
       - name: Stress test
         if: ${{ github.event_name == 'schedule' || github.event.inputs.stress-test == 'true' }}
         shell: bash
         run: |
-          ctest --output-on-failure -V -R stress -E cobyla
+          if [[ $FC == 'gfortran' ]] ; then
+              ctest --output-on-failure -V -R stress
+          else
+              ctest --output-on-failure -V -R stress -E cobyla
+          fi
 
 
   # The following job check whether the tests were successful or cancelled due to timeout.
diff --git a/.github/workflows/test_armflang_pi.yml b/.github/workflows/test_armflang_pi.yml
index e1a6917434..65e222e205 100644
--- a/.github/workflows/test_armflang_pi.yml
+++ b/.github/workflows/test_armflang_pi.yml
@@ -51,6 +51,14 @@ jobs:
       - name: Miscellaneous setup
         run: bash .github/scripts/misc_setup
 
+      - Revise bobyqa/trustregion.f90 to see why `xbdi(trueloc(xopt >= su .and. gopt <= 0)) = 1` leads to a SIGFPE
+        shell: bash
+        if: ${{ matrix.solver == 'bobyqa' }}
+        run:
+          cd fortran/bobyqa || exit 42
+          $SEDI "s|xbdi(trueloc(xopt >= su .and. gopt <= 0)) = 1|write(*,*) 'su = ', su, 'xopt = ', xopt, 'gopt = ', gopt\nxbdi(trueloc(xopt >= su .and. gopt <= 0)) = 1|"  trustregion.f90
+          cat trustregion.f90
+
       - name: Conduct the test
         run: |
           cd "$ROOT_DIR"/fortran/${{ matrix.solver }} && bash ./flint -r && bash ./mlint -r
diff --git a/.github/workflows/test_nvfortran_pi.yml b/.github/workflows/test_nvfortran_pi.yml
index acd87787c6..e526b3961c 100644
--- a/.github/workflows/test_nvfortran_pi.yml
+++ b/.github/workflows/test_nvfortran_pi.yml
@@ -43,13 +43,21 @@ jobs:
         uses: actions/checkout@v4
         if: github.event.inputs.git-ref != ''
         with:
-          ref: ${{ github.event.inputs.git-ref }} 
+          ref: ${{ github.event.inputs.git-ref }}
           ssh-key: ${{ secrets.SSH_PRIVATE_KEY_ACT }} # This forces checkout to use SSH, not HTTPS
           submodules: recursive
 
       - name: Miscellaneous setup
         run: bash .github/scripts/misc_setup
 
+      - Revise bobyqa/trustregion.f90 to see why `xbdi(trueloc(xopt >= su .and. gopt <= 0)) = 1` leads to a SIGFPE
+        shell: bash
+        if: ${{ matrix.solver == 'bobyqa' }}
+        run:
+          cd fortran/bobyqa || exit 42
+          $SEDI "s|xbdi(trueloc(xopt >= su .and. gopt <= 0)) = 1|write(*,*) 'su = ', su, 'xopt = ', xopt, 'gopt = ', gopt\nxbdi(trueloc(xopt >= su .and. gopt <= 0)) = 1|"  trustregion.f90
+          cat trustregion.f90
+
       - name: Conduct the test
         run: |
           # Without the following lines, flint does not invoke vtest. No idea why.