Add a workflow build/test for macOS+Sanitizers

.github/workflows/on_PR_mac_special_builds.yml

@@ -0,0 +1,51 @@
+name: On PRs - Mac Special Builds
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths-ignore:
+      - "*.md"
+
+jobs:
+  MacOS_releaseSanitizers:
+    name: 'MacOS - Clang - Release+Sanitizers'
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: install dependencies
+        run: |
+          brew install ninja
+          pushd /tmp
+          curl -LO https://github.com/google/googletest/archive/release-1.8.0.tar.gz
+          tar xzf   release-1.8.0.tar.gz
+          mkdir -p  googletest-release-1.8.0/build
+          pushd     googletest-release-1.8.0/build
+          cmake .. ; make ; make install
+          popd
+          popd
+
+      - name: Build
+        run: |
+          mkdir build && cd build && \
+          cmake -GNinja \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DBUILD_SHARED_LIBS=ON \
+            -DEXIV2_BUILD_SAMPLES=ON \
+            -DEXIV2_ENABLE_PNG=ON \
+            -DEXIV2_ENABLE_WEBREADY=ON \
+            -DEXIV2_ENABLE_CURL=ON \
+            -DEXIV2_BUILD_UNIT_TESTS=ON \
+            -DEXIV2_ENABLE_BMFF=ON \
+            -DEXIV2_TEAM_WARNINGS_AS_ERRORS=ON \
+            -DBUILD_WITH_COVERAGE=OFF \
+            -DEXIV2_TEAM_USE_SANITIZERS=ON \
+            -DCMAKE_INSTALL_PREFIX=install \
+            .. && \
+          cmake --build . --parallel
+
+      - name: Tests
+        run: |
+          cd build
+          ctest --output-on-failure

src/easyaccess.cpp

@@ -135,6 +135,7 @@ namespace Exiv2 {
             std::ostringstream os;
             md->write(os, &ed);
             bool ok = false;
+            if ( os.str().find("inf") != std::string::npos ) break;
             iso_val = parseInt64(os.str(), ok);
             if (ok && iso_val > 0) break;
             while (strcmp(keys[idx++], md->key().c_str()) != 0 && idx < cnt) {}