[line_buffer] fix long line issue

Fixes #980

TESTS_ENVIRONMENT.in

@@ -101,7 +101,7 @@ run_cap_test() {
 
     sed -ibak \
         -e "s;${test_dir};{test_dir};g" \
-        -e "s;${builddir};{builddir};g" \
+        -e "s;${builddir};{test_dir};g" \
         -e "s;${top_srcdir};{top_srcdir};g" \
         -e "s;${top_srcdir_parent};{top_srcdir_parent};g" \
         ${test_file_base}_${test_hash}.out

src/line_buffer.cc

@@ -990,7 +990,7 @@ line_buffer::load_next_line(file_range prev_line)
     auto offset = prev_line.next_offset();
     ssize_t request_size = INITIAL_REQUEST_SIZE;
     retval.li_file_range.fr_offset = offset;
-    if (this->lb_buffer.empty()) {
+    if (this->lb_buffer.empty() || !this->in_range(offset)) {
         this->fill_range(offset, this->lb_buffer.capacity());
     } else if (offset == this->lb_file_offset + this->lb_buffer.size()) {
         if (!this->fill_range(offset, INITIAL_REQUEST_SIZE)) {

src/view_curses.cc

@@ -136,7 +136,6 @@ view_curses::mvwattrline(WINDOW* window,
     auto& sa = al.get_attrs();
     auto& line = al.get_string();
     std::vector<utf_to_display_adjustment> utf_adjustments;
-    int exp_offset = 0;
     std::string full_line;
 
     require(lr_chars.lr_end >= 0);
@@ -198,7 +197,6 @@ view_curses::mvwattrline(WINDOW* window,
                             lr_bytes.lr_end += abs(offset);
                         }
 #endif
-                        exp_offset += offset;
                         utf_adjustments.emplace_back(lpc, offset);
                         for (; offset && (lpc + 1) < line.size();
                              lpc++, offset++)

test/expected/test_sessions.sh_e39648f425c3f291c9d1c0d14595a019abd0cb48.out

@@ -9,7 +9,7 @@
 # The files loaded into the session were:
 
 
-;INSERT OR IGNORE INTO environ (name, value) VALUES ('LOG_DIR_0', '{builddir}')
+;INSERT OR IGNORE INTO environ (name, value) VALUES ('LOG_DIR_0', '{test_dir}')
 :open $LOG_DIR_0/support-dump/logfile_access_log.0
 
 :rebuild