On Thu, 2020-06-04 at 16:35 -0400, Alvaro Herrera wrote:
> If it is something worth worrying about, let's discuss what's a good
> fix for it.
While making a minimal test case for the GCC bug report, I found
another surprisingly-small workaround. Patch attached.
Regards,
Jeff Davis
diff --git a/src/backend/utils/sort/logtape.c b/src/backend/utils/sort/logtape.c
index 666a7c0e81c..c09e1e308ae 100644
--- a/src/backend/utils/sort/logtape.c
+++ b/src/backend/utils/sort/logtape.c
@@ -99,7 +99,7 @@ typedef struct TapeBlockTrailer
* bytes on last block (if < 0) */
} TapeBlockTrailer;
-#define TapeBlockPayloadSize (BLCKSZ - sizeof(TapeBlockTrailer))
+#define TapeBlockPayloadSize (BLCKSZ - 16)
#define TapeBlockGetTrailer(buf) \
((TapeBlockTrailer *) ((char *) buf + TapeBlockPayloadSize))
