Add workaround for avr-libc realloc() bug (#475)
diff --git a/pb_decode.c b/pb_decode.c
index 052a531..9d0b7af 100644
--- a/pb_decode.c
+++ b/pb_decode.c
@@ -508,6 +508,16 @@
if (data_size == 0 || array_size == 0)
PB_RETURN_ERROR(stream, "invalid size");
+#ifdef __AVR__
+ /* Workaround for AVR libc bug 53284: http://savannah.nongnu.org/bugs/?53284
+ * Realloc to size of 1 byte can cause corruption of the malloc structures.
+ */
+ if (data_size == 1 && array_size == 1)
+ {
+ data_size = 2;
+ }
+#endif
+
/* Check for multiplication overflows.
* This code avoids the costly division if the sizes are small enough.
* Multiplication is safe as long as only half of bits are set
