Third trial on writer coverage

test/unittest/simdtest.cpp

@@ -136,15 +136,17 @@ TEST(SIMD, SIMD_SUFFIX(ScanCopyUnescapedString)) {
 }
 
 TEST(SIMD, SIMD_SUFFIX(ScanWriteUnescapedString)) {
+    char buffer[2048 + 1 + 32];
+    for (size_t offset = 0; offset < 32; offset++) {
         for (size_t step = 0; step < 1024; step++) {
-        char s[2048 + 1];
-        char *p = s;
+            char* s = buffer + offset;
+            char* p = s;
             for (size_t i = 0; i < step; i++)
-            *p++= "ABCD"[i % 4];
+                *p++ = "ABCD"[i % 4];
             char escape = "\0\n\\\""[step % 4];
             *p++ = escape;
             for (size_t i = 0; i < step; i++)
-            *p++= "ABCD"[i % 4];
+                *p++ = "ABCD"[i % 4];
 
             StringBuffer sb;
             Writer<StringBuffer> writer(sb);
@@ -178,6 +180,7 @@ TEST(SIMD, SIMD_SUFFIX(ScanWriteUnescapedString)) {
             EXPECT_EQ('\"', *q++);
             EXPECT_EQ('\0', *q++);
         }
+    }
 }
 
 #ifdef __GNUC__