Abandon a fill whose last flush fails to write

The slot being filled was forgotten before the page's final flush, so a
write that failed there, on a full disk for one, could not abandon the
fill: cgit died into the lock file instead and the visitor got nothing.
The mid-page path already delivered the page from the lock file.

1 file changed, 4 insertions, 2 deletions

diff --git a/source/cache.c b/source/cache.cindex a076823..82b3aad 100644--- a/source/cache.c+++ b/source/cache.c@@ -370,12 +370,14 @@ static int fill_slot(struct cache_slot *slot)  	slot_being_filled = slot; 	slot->fn();-	slot_being_filled = NULL;  	// All of the page has to reach the lock file before it is renamed-	// into place. After an abandoned fill stdout is the client again and+	// into place, and a write that fails on this last flush still finds+	// the slot to abandon, so the page goes to the visitor rather than+	// nowhere. After an abandoned fill stdout is the client again and 	// this same flush delivers the tail of the error page instead. 	html_flush();+	slot_being_filled = NULL; 	if (fflush(stdout)) 		return errno; 
diff --git a/source/cache.c b/source/cache.c
index a076823..82b3aad 100644
--- a/source/cache.c
+++ b/source/cache.c
@@ -370,12 +370,14 @@ static int fill_slot(struct cache_slot *slot)
 
 	slot_being_filled = slot;
 	slot->fn();
-	slot_being_filled = NULL;
 
 	// All of the page has to reach the lock file before it is renamed
-	// into place. After an abandoned fill stdout is the client again and
+	// into place, and a write that fails on this last flush still finds
+	// the slot to abandon, so the page goes to the visitor rather than
+	// nowhere. After an abandoned fill stdout is the client again and
 	// this same flush delivers the tail of the error page instead.
 	html_flush();
+	slot_being_filled = NULL;
 	if (fflush(stdout))
 		return errno;