From a27651908fc1b5ef73a81e46434a408c5868fa7b Mon Sep 17 00:00:00 2001
From: Rebecca Turner <rbt@sent.as>
Date: Thu, 8 Feb 2024 10:11:45 -0800
Subject: [PATCH] Add assertion for decreasing the indent
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Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com>
---
 src/libexpr/print.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libexpr/print.cc b/src/libexpr/print.cc
index 1ff026b3db3..cdc9f6dbeec 100644
--- a/src/libexpr/print.cc
+++ b/src/libexpr/print.cc
@@ -176,6 +176,7 @@ class Printer
     void decreaseIndent()
     {
         if (options.prettyPrint()) {
+            assert(indent.size() >= options.prettyIndent);
             indent.resize(indent.size() - options.prettyIndent);
         }
     }