[glass] Check for struct descriptor size 0 (#7192)

PeterJohnson · web-flow · commit 2d6f02d15b01 · 2024-10-11T16:09:32.000-07:00
This avoids a potential divide by 0.
diff --git a/glass/src/libnt/native/cpp/NetworkTables.cpp b/glass/src/libnt/native/cpp/NetworkTables.cpp
@@ -745,7 +745,7 @@ void NetworkTablesModel::ValueSource::UpdateFromValue(
           structName = *withoutArray;
         }
         auto desc = model.m_structDb.Find(structName);
-        if (desc && desc->IsValid()) {
+        if (desc && desc->IsValid() && desc->GetSize() != 0) {
           if (isArray) {
             // array of struct at top level
             if (valueChildrenMap) {

Original file line number	Diff line number	Diff line change
`@@ -745,7 +745,7 @@ void NetworkTablesModel::ValueSource::UpdateFromValue(`
`745`	`745`	`structName = *withoutArray;`
`746`	`746`	`}`
`747`	`747`	`auto desc = model.m_structDb.Find(structName);`
`748`		`- if (desc && desc->IsValid()) {`
	`748`	`+ if (desc && desc->IsValid() && desc->GetSize() != 0) {`
`749`	`749`	`if (isArray) {`
`750`	`750`	`// array of struct at top level`
`751`	`751`	`if (valueChildrenMap) {`