From 4e0db97856b4c788ed3c37a370838b141242448d Mon Sep 17 00:00:00 2001
From: Kevin Day <Kevin@kevux.org>
Date: Tue, 13 Oct 2026 23:56:04 -0500
Subject: [PATCH] Progress: Fix problems exposed by unit tests.

Assigning `range.start` to `newline_last` in basic list should only increment when `newline_last` is not the same value as `begin`.

The combining joiner skip code must also set the `line_stop` before continuing.

Add a comment to clarify some code that uses the found variable for a different purpose.
---
 level_1/fl_fss/c/fss/basic_list.c   | 2 +-
 level_1/fl_fss/c/private-fss-list.c | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/level_1/fl_fss/c/fss/basic_list.c b/level_1/fl_fss/c/fss/basic_list.c
index 5958cc4c4..412983d9f 100644
--- a/level_1/fl_fss/c/fss/basic_list.c
+++ b/level_1/fl_fss/c/fss/basic_list.c
@@ -245,7 +245,7 @@ extern "C" {
             range->start = newline_last;
           }
           else {
-            range->start = newline_last + 1;
+            range->start = begin == newline_last ? newline_last : newline_last + 1;
             found->array[found->used++].stop = newline_last;
           }
 
diff --git a/level_1/fl_fss/c/private-fss-list.c b/level_1/fl_fss/c/private-fss-list.c
index 808ef1389..76652f9f6 100644
--- a/level_1/fl_fss/c/private-fss-list.c
+++ b/level_1/fl_fss/c/private-fss-list.c
@@ -79,7 +79,7 @@ extern "C" {
 
     uint8_t flag_fl = ___fl_flag_has_graph_first___;
 
-    found->start = range->start;
+    found->start = begin;
 
     // Identify where the object ends.
     while (F_status_is_error_not(state->status) && range->start <= range->stop && range->start < buffer.used && buffer.string[range->start] != f_fss_eol_s.string[0]) {
@@ -229,6 +229,7 @@ extern "C" {
                 }
               } // while
 
+              // Use the found range to test the buffer decrement.
               range->start = found->stop + 1;
               found->start = line_stop;
               found->stop = line_stop;
@@ -267,6 +268,8 @@ extern "C" {
 
             f_fss_skip_past_combining_joiner(buffer, range, state);
 
+            line_stop = range->start;
+
             continue;
           }
 
@@ -306,6 +309,8 @@ extern "C" {
           if (f_fss_is_combining_joiner(buffer, *range, state) == F_true) {
             f_fss_skip_past_combining_joiner(buffer, range, state);
 
+            line_stop = range->start;
+
             continue;
           }
         }
-- 
2.52.0