From 5c86c1eda9cd75e0fa85b132ca4c8306e9fc81d5 Mon Sep 17 00:00:00 2001
From: cui <cuiweixie@gmail.com>
Date: Fri, 27 Mar 2026 17:20:10 +0800
Subject: [PATCH] fixes #25670; docgen: cmpDecimalsIgnoreCase max() used wrong
 index for b (#25669)

Fixes bug #25670.

The second argument to `max` in `cmpDecimalsIgnoreCase` used `limitB -
iA` instead of `limitB - iB`, which could mis-order numeric segments
when sorting doc index entries.
---
 compiler/docgen.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/docgen.nim b/compiler/docgen.nim
index 307761409c..71af95a5f2 100644
--- a/compiler/docgen.nim
+++ b/compiler/docgen.nim
@@ -148,7 +148,7 @@ proc cmpDecimalsIgnoreCase(a, b: string): int =
         limitB = iB
       while limitA < aLen and isDigit(a[limitA]): inc limitA
       while limitB < bLen and isDigit(b[limitB]): inc limitB
-      var pos = max(limitA-iA, limitB-iA)
+      var pos = max(limitA-iA, limitB-iB)
       while pos > 0:
         if limitA-pos < iA:  # digit in `a` is 0 effectively
           result = ord('0') - ord(b[limitB-pos])