8000 problem warning compile ZSTD 1.5.0 with Visual Studio 2019 · Issue #2661 · facebook/zstd · GitHub
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problem warning compile ZSTD 1.5.0 with Visual Studio 2019 #2661

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gvollant opened this issue May 16, 2021 · 1 comment
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problem warning compile ZSTD 1.5.0 with Visual Studio 2019 #2661

gvollant opened this issue May 16, 2021 · 1 comment

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@gvollant
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         C:\cygwin64\home\exploit\develop_20210516_124802_cible\exterieur\zstd\lib\compress\zstd_lazy.c(1399): error C4703: variable de pointeur locale potentiellement non initialis‚e 'dmsTagRow' utilis‚e [C:\cygwin64\home\exploit\develop_20210516_124802_cible\amaLibPhone.vcxproj]
         C:\cygwin64\home\exploit\develop_20210516_124802_cible\exterieur\zstd\lib\compress\zstd_lazy.c(1407): error C4703: variable de pointeur locale potentiellement non initialis‚e 'dmsRow' utilis‚e [C:\cygwin64\home\exploit\develop_20210516_124802_cible\amaLibPhone.vcxproj]

the error is described at https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4703?view=msvc-160

I suppres the warning with this simple fix:
*** /mnt/n/devn/exterieur/zstd/lib/compress/zstd_lazy.c 2021-05-16 13:21:45.021859200 +0200
--- /mnt/w/softw/exterieur/zstd/lib/compress/zstd_lazy.c        2021-05-16 14:34:23.300517900 +0200
***************
*** 1296,1303 ****
      size_t ddsIdx;
      U32 ddsExtraAttempts; /* cctx hash tables are limited in searches, but allow extra searches into DDS */
      U32 dmsTag;
!     U32* dmsRow;
!     BYTE* dmsTagRow;

      if (dictMode == ZSTD_dedicatedDictSearch) {
          const U32 ddsHashLog = dms->cParams.hashLog - ZSTD_LAZY_DDSS_BUCKET_LOG;
--- 1296,1303 ----
      size_t ddsIdx;
      U32 ddsExtraAttempts; /* cctx hash tables are limited in searches, but allow extra searches into DDS */
      U32 dmsTag;
!     U32* dmsRow = NULL;
!     BYTE* dmsTagRow = NULL;

      if (dictMode == ZSTD_dedicatedDictSearch) {
          const U32 ddsHashLog = dms->cParams.hashLog - ZSTD_LAZY_DDSS_BUCKET_LOG;
@gvollant
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the fix is at #2654

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