fixed : cli : forgotten mandatory argument

programs/zstdcli.c

@@ -434,6 +434,8 @@ int main(int argCount, const char* argv[])
         filenameTable[filenameIdx++] = argument;
     }
 
+    if (lastCommand) { DISPLAY("error : command must be followed by argument \n"); return 1; }  /* forgotten argument */
+
     /* Welcome message (if verbose) */
     DISPLAYLEVEL(3, WELCOME_MESSAGE);
 

tests/playTests.sh

@@ -62,6 +62,9 @@ $ECHO "test : -o must be followed by filename (must fail)"
 $ZSTD tmp -of tmpCompressed && die "-o must be followed by filename "
 $ECHO "test : force write, correct order"
 $ZSTD tmp -fo tmpCompressed
+$ECHO "test : forgotten argument"
+cp tmp tmp2
+$ZSTD tmp2 -fo && die "-o must be followed by filename "
 $ECHO "test : implied stdout when input is stdin"
 $ECHO bob | $ZSTD | $ZSTD -d
 $ECHO "test : null-length file roundtrip"