ensure appveyor test fails due to formatting error

to catch %zu incompatibility

diff --git a/appveyor.yml b/appveyor.yml
index 742f612069dccfc361eae5322e8153b8b2d2df66..42eb71d647bc3bf40e741fcd0e3755eef8d5f3fd 100644 (file)
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -181,7 +181,7 @@
     - COMPILER: "gcc"
       HOST:     "mingw"
       PLATFORM: "x64"
-      SCRIPT:   "make allzstd"
+      SCRIPT:   "CPPFLAGS=-DDEBUGLEVEL=2 CFLAGS=-Werror make -j allzstd"
     - COMPILER: "gcc"
       HOST:     "mingw"
       PLATFORM: "x86"