From 43fb253b75a3c76977317a111798c7be512bd032 Mon Sep 17 00:00:00 2001
From: Tyge Løvset <tylo@norceresearch.no>
Date: Wed, 18 Jan 2023 11:33:56 +0100
Subject: fix bug in cspan_begin().

---
 include/stc/cspan.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/stc/cspan.h b/include/stc/cspan.h
index af76ea63..a4c8f5cb 100644
--- a/include/stc/cspan.h
+++ b/include/stc/cspan.h
@@ -67,7 +67,8 @@ int demo2() {
     typedef struct { Self##_value *data; uint32_t dim[RANK]; } Self; \
     \
     STC_INLINE Self##_iter Self##_begin(const Self* self) { \
-        Self##_iter it = {self->data, self->data + cspan_size(self)}; \
+        size_t n = cspan_size(self); \
+        Self##_iter it = {n ? self->data : NULL, self->data + n}; \
         return it; \
     } \
     STC_INLINE Self##_iter Self##_end(const Self* self) { \
-- 
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