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-rw-r--r--Build/source/utils/asymptote/base/simplex.asy6
1 files changed, 4 insertions, 2 deletions
diff --git a/Build/source/utils/asymptote/base/simplex.asy b/Build/source/utils/asymptote/base/simplex.asy
index bd9f69c9324..43920109ff4 100644
--- a/Build/source/utils/asymptote/base/simplex.asy
+++ b/Build/source/utils/asymptote/base/simplex.asy
@@ -184,8 +184,10 @@ struct problem {
// Checks that constants are valid.
bool validConstants() {
for (int i = 0; i < rows.length; ++i)
- if (rows[i].c < 0)
- return false;
+ // Do not test the row for b, as it does not have a non-negativity
+ // condition.
+ if (i != VAR_B && rows[i].c < 0)
+ return false;
return true;
}