[vim/vim] [ASAN LeakSanitizer: detected memory leaks] when testing test_options.vim (Issue #9921)

[KYY]

Steps to reproduce

1. in src/Makefile, disable the the GUI and window-x CONF_OPT_GUI = --disable-gui and CONF_OPT_X = --without-x
2. then specify the ASAN for the compilation:

CFLAGS = -g3 -fsanitize=address -fno-common -fno-omit-frame-pointer -fPIC
LDFLAGS = -g3 -fsanitize=address -fno-common -fno-omit-frame-pointer -fPIC

3. compile with make reconfig
4. after compilation, go to src/testdir and trigger the ASAN LeakSanitizer by testing for test_options.vim:

# at src/testdir
$ VIMRUNTIME=../../runtime  ../vim -f  -u unix.vim -U NONE --noplugin --not-a-term -S runtest.vim test_options.vim --cmd 'au SwapExists * let v:swapchoice = "e"' | LC_ALL=C LANG=C LANGUAGE=C awk '/Executing Test_/{match($0, "Executing Test_[^\\)]*\\)"); print substr($0, RSTART, RLENGTH) "\r"; fflush()}'

Expected behaviour

Expected no memory leak, instead get ASAN memory leak error:

# for test_options.vim
=================================================================
==138337==ERROR: LeakSanitizer: detected memory leaks

Version of Vim

8.2.4407

Environment

OS: Linux Mint 20.3 (Una)
Terminal: xfce4-terminal 0.8.10
$TERM: xterm-256color
Shell: /bin/bash

Logs and stack traces

=================================================================
==138408==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 560 byte(s) in 2 object(s) allocated from:
    #0 0x4993e2 in calloc (src/vim+0x4993e2)
    #1 0x7f5d582a9db7 in _nc_setupterm (/lib/x86_64-linux-gnu/libtinfo.so.6+0x13db7)

Direct leak of 8 byte(s) in 1 object(s) allocated from:
    #0 0x485614 in strdup (src/vim+0x485614)
    #1 0x7f5d582b14f7 in _nc_trim_sgr0 (/lib/x86_64-linux-gnu/libtinfo.so.6+0x1b4f7)

Indirect leak of 7988 byte(s) in 6 object(s) allocated from:
    #0 0x499589 in realloc (src/vim+0x499589)
    #1 0x7f5d582a72c7 in _nc_doalloc (/lib/x86_64-linux-gnu/libtinfo.so.6+0x112c7)

Indirect leak of 7584 byte(s) in 2 object(s) allocated from:
    #0 0x49926d in malloc (src/vim+0x49926d)
    #1 0x7f5d582a51af  (/lib/x86_64-linux-gnu/libtinfo.so.6+0xf1af)

Indirect leak of 3042 byte(s) in 2 object(s) allocated from:
    #0 0x49926d in malloc (src/vim+0x49926d)
    #1 0x7f5d582afe82 in _nc_read_termtype (/lib/x86_64-linux-gnu/libtinfo.so.6+0x19e82)

Indirect leak of 1510 byte(s) in 2 object(s) allocated from:
    #0 0x49926d in malloc (src/vim+0x49926d)
    #1 0x7f5d582b080b in _nc_read_termtype (/lib/x86_64-linux-gnu/libtinfo.so.6+0x1a80b)

Indirect leak of 992 byte(s) in 2 object(s) allocated from:
    #0 0x4993e2 in calloc (src/vim+0x4993e2)
    #1 0x7f5d582b078b in _nc_read_termtype (/lib/x86_64-linux-gnu/libtinfo.so.6+0x1a78b)

Indirect leak of 992 byte(s) in 2 object(s) allocated from:
    #0 0x49926d in malloc (src/vim+0x49926d)
    #1 0x7f5d582a52d9  (/lib/x86_64-linux-gnu/libtinfo.so.6+0xf2d9)

Indirect leak of 156 byte(s) in 2 object(s) allocated from:
    #0 0x49926d in malloc (src/vim+0x49926d)
    #1 0x7f5d582a51ff  (/lib/x86_64-linux-gnu/libtinfo.so.6+0xf1ff)

Indirect leak of 92 byte(s) in 2 object(s) allocated from:
    #0 0x49926d in malloc (src/vim+0x49926d)
    #1 0x7f5d582a518e  (/lib/x86_64-linux-gnu/libtinfo.so.6+0xf18e)

Indirect leak of 21 byte(s) in 2 object(s) allocated from:
    #0 0x485614 in strdup (src/vim+0x485614)
    #1 0x7f5d582a9e4f in _nc_setupterm (/lib/x86_64-linux-gnu/libtinfo.so.6+0x13e4f)

SUMMARY: AddressSanitizer: 22945 byte(s) leaked in 25 allocation(s).

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[Christian Brabandt]

Those leaks do come not from Vim, but some other libraries. In the CI, libtinfo is ignored when detecting leaks

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[Christian Brabandt]

Closed #9921.

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[KYY]

i see. Thank you for the information!

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