CI: Work around musl AArch64 failures caused by empty exception backtraces

Author: kinke

.github/actions/4b-test-lit/action.yml

@@ -16,6 +16,10 @@ runs:
           # FIXME: the following tests fail
           rm tests/debuginfo/nested_gdb.d
           rm tests/sanitizers/fuzz_basic.d
+          if type -P apk &>/dev/null; then
+            # FIXME: empty exception backtrace on musl AArch64
+            rm tests/codegen/exception_strack_trace.d
+          fi
         fi
 
         cd ../build

.github/actions/4c-test-dmd/action.yml

@@ -1,15 +1,25 @@
 name: Run DMD testsuite
 inputs:
   arch:
-    required: false # Windows only
+    required: true
 runs:
   using: composite
   steps:
 
     - name: 'Posix: Run DMD testsuite'
       if: runner.os != 'Windows'
       shell: bash
-      run: cd ../build && ctest -V -R "dmd-testsuite"
+      run: |
+        set -eux
+
+        if [[ '${{ inputs.arch }}' == aarch64 ]] && type -P apk &>/dev/null; then
+          # FIXME: empty exception backtraces on musl AArch64 with enabled optimizations
+          rm tests/dmd/runnable/test19086.d
+          rm tests/dmd/runnable/test17559.d
+        fi
+
+        cd ../build
+        ctest -V -R "dmd-testsuite"
 
     - name: 'Windows: Run DMD testsuite'
       if: runner.os == 'Windows'

.github/actions/4d-test-libs/action.yml

@@ -25,6 +25,10 @@ runs:
         elif [[ '${{ runner.os }}-${{ inputs.arch }}' == Linux-aarch64 ]]; then
           # FIXME: sporadically hanging
           excludes+='|^core.thread-shared$'
+          if type -P apk &>/dev/null; then
+            # FIXME: empty exception backtraces on musl AArch64 with enabled optimizations
+            excludes+='|^druntime-test-exceptions-release$'
+          fi
         fi
         if [[ '${{ runner.os }}' == macOS ]]; then
           # FIXME: https://github.com/dlang/phobos/issues/10730