From 603bc09d0f6235379f9026b25a5f78bf490a6704 Mon Sep 17 00:00:00 2001
From: orbitalquark <70453897+orbitalquark@users.noreply.github.com>
Date: Thu, 12 Sep 2024 21:52:09 -0400
Subject: Increase the default LPeg stack size

It is not clear how large this value should be. It appears to be a function of grammar complexity.

For example, a problematic HTML file requires a value of 1329 to work, but removing either the
'attribute' rule or an embedded lexer reduces the limit.

However, identifying which files trigger a stack overflow is not trivial. It does not appear to
depend on file size. For example, the problematic HTML file is 125K, but a non-problematic HTML
file of 500K works.
---
 lua/lexers/lexer.lua | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'lua/lexers/lexer.lua')

diff --git a/lua/lexers/lexer.lua b/lua/lexers/lexer.lua
index 12a1404..791e810 100644
--- a/lua/lexers/lexer.lua
+++ b/lua/lexers/lexer.lua
@@ -781,6 +781,8 @@ local lpeg = lpeg
 local P, R, S, V, B = lpeg.P, lpeg.R, lpeg.S, lpeg.V, lpeg.B
 local Ct, Cc, Cp, Cmt, C = lpeg.Ct, lpeg.Cc, lpeg.Cp, lpeg.Cmt, lpeg.C
 
+lpeg.setmaxstack(2048) -- the default of 400 is too low for complex grammars
+
 --- Default tags.
 local default = {
   'whitespace', 'comment', 'string', 'number', 'keyword', 'identifier', 'operator', 'error',
-- 
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