76 lines
2.4 KiB
Diff
76 lines
2.4 KiB
Diff
From 249e1b903a9c0460d618f6dcc59aeb8c03b24b20 Mon Sep 17 00:00:00 2001
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From: Bram Moolenaar <Bram@vim.org>
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Date: Sun, 14 Aug 2022 22:23:02 +0100
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Subject: [PATCH] patch 9.0.0213: using freed memory with error in assert
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argument
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Problem: Using freed memory with error in assert argument.
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Solution: Make a copy of the error.
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---
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src/testdir/test_assert.vim | 4 ++++
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src/testing.c | 18 ++++++++++++------
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2 files changed, 16 insertions(+), 6 deletions(-)
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diff --git a/src/testdir/test_assert.vim b/src/testdir/test_assert.vim
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index 27b2d73..7c9d090 100644
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--- a/src/testdir/test_assert.vim
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+++ b/src/testdir/test_assert.vim
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@@ -291,6 +291,10 @@ func Test_assert_fail_fails()
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let exp = v:exception
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endtry
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call assert_match("E1174: String required for argument 5", exp)
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+
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+ call assert_equal(1, assert_fails('c0', ['', '\1']))
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+ call assert_match("Expected '\\\\\\\\1' but got 'E939: Positive count required: c0': c0", v:errors[0])
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+ call remove(v:errors, 0)
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endfunc
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func Test_assert_fails_in_try_block()
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diff --git a/src/testing.c b/src/testing.c
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index c49df4b..43b8d20 100644
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--- a/src/testing.c
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+++ b/src/testing.c
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@@ -597,6 +597,7 @@ f_assert_fails(typval_T *argvars, typval_T *rettv)
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int save_trylevel = trylevel;
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int called_emsg_before = called_emsg;
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char *wrong_arg_msg = NULL;
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+ char_u *tofree = NULL;
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if (check_for_string_or_number_arg(argvars, 0) == FAIL
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|| check_for_opt_string_or_list_arg(argvars, 1) == FAIL
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@@ -660,13 +661,17 @@ f_assert_fails(typval_T *argvars, typval_T *rettv)
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}
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else if (list->lv_len == 2)
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{
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- tv = &list->lv_u.mat.lv_last->li_tv;
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- actual = get_vim_var_str(VV_ERRMSG);
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- expected = tv_get_string_buf_chk(tv, buf);
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- if (!pattern_match(expected, actual, FALSE))
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+ // make a copy, an error in pattern_match() may free it
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+ tofree = actual = vim_strsave(get_vim_var_str(VV_ERRMSG));
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+ if (actual != NULL)
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{
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- error_found = TRUE;
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- expected_str = expected;
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+ tv = &list->lv_u.mat.lv_last->li_tv;
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+ expected = tv_get_string_buf_chk(tv, buf);
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+ if (!pattern_match(expected, actual, FALSE))
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+ {
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+ error_found = TRUE;
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+ expected_str = expected;
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+ }
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}
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}
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}
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@@ -749,6 +754,7 @@ theend:
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msg_scrolled = 0;
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lines_left = Rows;
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VIM_CLEAR(emsg_assert_fails_msg);
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+ vim_free(tofree);
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set_vim_var_string(VV_ERRMSG, NULL, 0);
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if (wrong_arg_msg != NULL)
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emsg(_(wrong_arg_msg));
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--
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2.36.1
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