From 6008f78b4dded3283cf75409682c73e8b08a657c Mon Sep 17 00:00:00 2001
From: Nora Abi Akar <nora.abiakar@gmail.com>
Date: Fri, 27 Mar 2020 10:02:16 +0100
Subject: [PATCH] bug fix: fine matrix solve
---
arbor/backends/gpu/forest.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arbor/backends/gpu/forest.cpp b/arbor/backends/gpu/forest.cpp
index 09a200a6..6fe4de85 100644
--- a/arbor/backends/gpu/forest.cpp
+++ b/arbor/backends/gpu/forest.cpp
@@ -19,7 +19,7 @@ forest::forest(const std::vector<size_type>& p, const std::vector<size_type>& ce
util::assign_from(
util::transform_view(
util::subrange_view(p, cell_cv_divs[c], cell_cv_divs[c+1]),
- [cell_start](unsigned i) {return i-cell_start;}));
+ [cell_start](unsigned i) {return i == -1 ? i : i - cell_start;}));
auto fine_tree = tree(cell_p);
--
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