diff --git a/.github/workflows/dev-short-tests.yml b/.github/workflows/dev-short-tests.yml
index 0092775b1..1f676c46b 100644
--- a/.github/workflows/dev-short-tests.yml
+++ b/.github/workflows/dev-short-tests.yml
@@ -151,6 +151,23 @@ jobs:
           make gcc8install
           CC=gcc-8 CFLAGS="-Werror" make -j all
 
+  visual-2019:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        platform: [x64, Win32]
+        configuration: [Debug, Release]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Add MSBuild to PATH
+      uses: microsoft/setup-msbuild@v1.0.2
+    - name: Build
+      working-directory: ${{env.GITHUB_WORKSPACE}}
+      # See https://docs.microsoft.com/visualstudio/msbuild/msbuild-command-line-reference
+      run: >
+        msbuild "build\VS2010\zstd.sln" /m /verbosity:minimal /property:PlatformToolset=v142
+        /t:Clean,Build /p:Platform=${{matrix.platform}} /p:Configuration=${{matrix.configuration}}
+
   visual-2015:
     # only GH actions windows-2016 contains VS 2015
     runs-on: windows-2016
@@ -168,6 +185,21 @@ jobs:
         msbuild "build\VS2010\zstd.sln" /m /verbosity:minimal /property:PlatformToolset=v140
         /t:Clean,Build /p:Platform=${{matrix.platform}} /p:Configuration=${{matrix.configuration}}
   
+  minimal-decompressor-macros:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: minimal decompressor macros
+      run: |
+        make clean && make -j all ZSTD_LIB_MINIFY=1 MOREFLAGS="-Werror"
+        make clean && make check ZSTD_LIB_MINIFY=1 MOREFLAGS="-Werror"
+        make clean && make -j all MOREFLAGS="-Werror -DHUF_FORCE_DECOMPRESS_X1 -DZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT"
+        make clean && make check MOREFLAGS="-Werror -DHUF_FORCE_DECOMPRESS_X1 -DZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT"
+        make clean && make -j all MOREFLAGS="-Werror -DHUF_FORCE_DECOMPRESS_X2 -DZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG"
+        make clean && make check MOREFLAGS="-Werror -DHUF_FORCE_DECOMPRESS_X2 -DZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG"
+        make clean && make -j all MOREFLAGS="-Werror -DZSTD_NO_INLINE -DZSTD_STRIP_ERROR_STRINGS"
+        make clean && make check MOREFLAGS="-Werror -DZSTD_NO_INLINE -DZSTD_STRIP_ERROR_STRINGS"
+
 # For reference : icc tests
 # icc tests are currently failing on Github Actions, likely to issues during installation stage
 # To be fixed later
diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index d6bbca7d1..fa49df6ab 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -3646,6 +3646,7 @@ static size_t ZSTD_compressBlock_splitBlock_internal(ZSTD_CCtx* zc, void* dst, s
     repcodes_t cRep;
     ZSTD_memcpy(dRep.rep, zc->blockState.prevCBlock->rep, sizeof(repcodes_t));
     ZSTD_memcpy(cRep.rep, zc->blockState.prevCBlock->rep, sizeof(repcodes_t));
+    ZSTD_memset(&nextSeqStore, 0, sizeof(seqStore_t));
 
     DEBUGLOG(4, "ZSTD_compressBlock_splitBlock_internal (dstCapacity=%u, dictLimit=%u, nextToUpdate=%u)",
                 (unsigned)dstCapacity, (unsigned)zc->blockState.matchState.window.dictLimit,
diff --git a/lib/compress/zstd_lazy.c b/lib/compress/zstd_lazy.c
index e1f5a4f0d..7009fd2e7 100644
--- a/lib/compress/zstd_lazy.c
+++ b/lib/compress/zstd_lazy.c
@@ -1176,9 +1176,10 @@ size_t ZSTD_RowFindBestMatch_generic (
 
     /* DMS/DDS variables that may be referenced laster */
     const ZSTD_matchState_t* const dms = ms->dictMatchState;
-    size_t ddsIdx;
-    U32 ddsExtraAttempts; /* cctx hash tables are limited in searches, but allow extra searches into DDS */
-    U32 dmsTag;
+    /* Initialize the following variables to satisfy static analyzer */
+    size_t ddsIdx = 0;
+    U32 ddsExtraAttempts = 0; /* cctx hash tables are limited in searches, but allow extra searches into DDS */
+    U32 dmsTag = 0;
     U32* dmsRow = NULL;
     BYTE* dmsTagRow = NULL;