# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1639168203 -3600
# Node ID 08e3eee541ac66fc1728cde425d02db3bad59947
# Parent  653b058ee612116fbf93fad6df37c463d61e2052
patch 8.2.3776: when a tags file line is long a tag may not be found

Commit: https://github.com/vim/vim/commit/f8e9eb8e173bf0ff9560192ae888941ef8302269
Author: Bram Moolenaar <Bram@vim.org>
Date:   Fri Dec 10 20:15:15 2021 +0000

    patch 8.2.3776: when a tags file line is long a tag may not be found

    Problem:    When a tags file line is long a tag may not be found.
    Solution:   When increasing the buffer size read the same line again.

diff --git a/src/tag.c b/src/tag.c
--- a/src/tag.c
+++ b/src/tag.c
@@ -2011,8 +2011,6 @@ find_tags(
 		eof = vim_fgets(lbuf, lbuf_size, fp);
 		if (!eof && search_info.curr_offset != 0)
 		{
-		    // The explicit cast is to work around a bug in gcc 3.4.2
-		    // (repeated below).
 		    search_info.curr_offset = vim_ftell(fp);
 		    if (search_info.curr_offset == search_info.high_offset)
 		    {
@@ -2052,7 +2050,10 @@ find_tags(
 			eof = cs_fgets(lbuf, lbuf_size);
 		    else
 #endif
+		    {
+			search_info.curr_offset = vim_ftell(fp);
 			eof = vim_fgets(lbuf, lbuf_size, fp);
+		    }
 		} while (!eof && vim_isblankline(lbuf));
 
 		if (eof)
@@ -2294,6 +2295,10 @@ parse_line:
 		lbuf = alloc(lbuf_size);
 		if (lbuf == NULL)
 		    goto findtag_end;
+
+		if (state == TS_STEP_FORWARD)
+		    // Seek to the same position to read the same line again
+		    vim_fseek(fp, search_info.curr_offset, SEEK_SET);
 #ifdef FEAT_TAG_BINS
 		// this will try the same thing again, make sure the offset is
 		// different
diff --git a/src/testdir/test_taglist.vim b/src/testdir/test_taglist.vim
--- a/src/testdir/test_taglist.vim
+++ b/src/testdir/test_taglist.vim
@@ -236,4 +236,23 @@ func Test_tag_complete_wildoptions()
   set tags&
 endfunc
 
+func Test_tag_complete_with_overlong_line()
+  let tagslines =<< trim END
+      !_TAG_FILE_FORMAT	2	//
+      !_TAG_FILE_SORTED	1	//
+      !_TAG_FILE_ENCODING	utf-8	//
+      inboundGSV	a	1;"	r
+      inboundGovernor	a	2;"	kind:⊢	type:forall (muxMode :: MuxMode) socket peerAddr versionNumber m a b. (MonadAsync m, MonadCatch m, MonadEvaluate m, MonadThrow m, MonadThrow (STM m), MonadTime m, MonadTimer m, MonadMask m, Ord peerAddr, HasResponder muxMode ~ True) => Tracer m (RemoteTransitionTrace peerAddr) -> Tracer m (InboundGovernorTrace peerAddr) -> ServerControlChannel muxMode peerAddr ByteString m a b -> DiffTime -> MuxConnectionManager muxMode socket peerAddr versionNumber ByteString m a b -> StrictTVar m InboundGovernorObservableState -> m Void
+      inboundGovernorCounters	a	3;"	kind:⊢	type:InboundGovernorState muxMode peerAddr m a b -> InboundGovernorCounters
+  END
+  call writefile(tagslines, 'Xtags')
+  set tags=Xtags
+
+  call feedkeys(":tag inbou\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"tag inboundGSV inboundGovernor inboundGovernorCounters', @:)
+
+  call delete('Xtags')
+  set tags&
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3776,
+/**/
     3775,
 /**/
     3774,