ci: add jobs to build/test with gfortran in debug mode (#1966)

Add jobs to the gfortran test matrix in ci.yml to build and test in debug mode. The intent is to catch situations like the one fixed by #1959. To avoid too much CI burden this PR only adds macos-14 and ubuntu-22.04 jobs. This seems to add ~15min to total runtime.

.github/workflows/ci.yml

@@ -199,7 +199,19 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-22.04, macos-12, macos-14, windows-2022 ]
+        include:
+          - os: macos-12
+            debug: false
+          - os: macos-14
+            debug: false
+          - os: macos-14
+            debug: true
+          - os: ubuntu-22.04
+            debug: false
+          - os: ubuntu-22.04
+            debug: true
+          - os: windows-2022
+            debug: false
     defaults:
       run:
         shell: bash
@@ -253,7 +265,9 @@ jobs:
         working-directory: modflow6
         run: |
           setupargs=""
-          if [[ "${{ matrix.os }}" == "macos-14" ]]; then
+          if [[ "${{ matrix.debug }}" == "true" ]]; then
+            setupargs="-Ddebug=true -Doptimization=0"
+          elif [[ "${{ matrix.os }}" == "macos-14" ]]; then
             setupargs="-Doptimization=1"
           fi
           pixi run setup builddir $setupargs

autotest/test_prt_disv1.py

@@ -414,7 +414,6 @@ def compare_output(name, mf6_pls, mp7_pls, mp7_eps):
     if "bprp" not in name:
         # pollock's method should be (nearly) identical
         mf6_pls_plck = mf6_pls[mf6_pls.particlegroup == 1]
-        # import pdb; pdb.set_trace()
         assert mf6_pls_plck.shape == mp7_pls.shape
         assert np.allclose(mf6_pls_plck, mp7_pls, atol=1e-3)