From 20a7fe89b5e957287f5f705dbd6de3be4e8f6b13 Mon Sep 17 00:00:00 2001
From: Sebastian Ullrich <sebasti@nullri.ch>
Date: Wed, 14 Aug 2024 15:39:35 +0200
Subject: [PATCH] perf: mark entire reported info tree as persistent (#5040)

As we can definitely not free it until .ilean generation at the very end
---
 src/Lean/Language/Lean.lean | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Lean/Language/Lean.lean b/src/Lean/Language/Lean.lean
index e74107bee0..e4757b55f9 100644
--- a/src/Lean/Language/Lean.lean
+++ b/src/Lean/Language/Lean.lean
@@ -599,7 +599,7 @@ where
     let minimal := internal.minimalSnapshots.get scope.opts && !Parser.isTerminalCommand stx
     finishedPromise.resolve {
       diagnostics := (← Snapshot.Diagnostics.ofMessageLog cmdState.messages)
-      infoTree? := cmdState.infoState.trees[0]!
+      infoTree? := Runtime.markPersistent cmdState.infoState.trees[0]!
       cmdState := if minimal then {
         env := initEnv
         maxRecDepth := 0