71 lines
2.2 KiB
Diff
71 lines
2.2 KiB
Diff
From ccfde4d028e891a41e3548323c3d47b06fb0b83e Mon Sep 17 00:00:00 2001
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From: Bram Moolenaar <Bram@vim.org>
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Date: Mon, 5 Sep 2022 19:51:13 +0100
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Subject: [PATCH] patch 9.0.0389: crash when 'tagfunc' closes the window
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Problem: Crash when 'tagfunc' closes the window.
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Solution: Bail out when the window was closed.
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---
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src/globals.h | 3 +++
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src/tag.c | 10 ++++++++++
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src/testdir/test_tagfunc.vim | 12 ++++++++++++
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3 files changed, 25 insertions(+)
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diff --git a/src/globals.h b/src/globals.h
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index 3067cfa..1ea3c14 100644
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--- a/src/globals.h
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+++ b/src/globals.h
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@@ -1764,3 +1764,6 @@ EXTERN char e_command_too_recursive[]
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EXTERN char e_regexp_number_after_dot_pos_search[]
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INIT(= N_("E1204: No Number allowed after .: '\\%%%c'"));
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+
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+EXTERN char e_window_unexpectedly_close_while_searching_for_tags[]
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+ INIT(= N_("E1299: Window unexpectedly closed while searching for tags"));
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diff --git a/src/tag.c b/src/tag.c
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index aceb6e4..e49a4d4 100644
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--- a/src/tag.c
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+++ b/src/tag.c
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@@ -570,6 +570,16 @@ do_tag(
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max_num_matches = MAXCOL; // If less than max_num_matches
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// found: all matches found.
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+ // A tag function may do anything, which may cause various
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+ // information to become invalid. At least check for the tagstack
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+ // to still be the same.
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+ if (tagstack != curwin->w_tagstack)
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+ {
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+ emsg(_(e_window_unexpectedly_close_while_searching_for_tags));
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+ FreeWild(new_num_matches, new_matches);
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+ break;
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+ }
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+
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// If there already were some matches for the same name, move them
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// to the start. Avoids that the order changes when using
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// ":tnext" and jumping to another file.
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diff --git a/src/testdir/test_tagfunc.vim b/src/testdir/test_tagfunc.vim
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index 68f2a50..cd60afe 100644
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--- a/src/testdir/test_tagfunc.vim
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+++ b/src/testdir/test_tagfunc.vim
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@@ -93,4 +93,16 @@ func Test_tagfunc_wipes_buffer()
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set tagfunc=
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endfunc
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+func Test_tagfunc_closes_window()
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+ split any
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+ func MytagfuncClose(pat, flags, info)
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+ close
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+ return [{'name' : 'mytag', 'filename' : 'Xtest', 'cmd' : '1'}]
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+ endfunc
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+ set tagfunc=MytagfuncClose
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+ call assert_fails('tag xyz', 'E1299:')
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+
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+ set tagfunc=
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+endfunc
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+
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" vim: shiftwidth=2 sts=2 expandtab
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--
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2.33.0
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