autofree crash with $dbg

[Eliyaan]

Describe the bug

it crashes pretty fast because of a double free.

Reproduction Steps

import os
os.execute("cat bug.v")
$dbg

run with v -autofree run bug.v, wait for the break point, type a bit in the input and then it crashes.

Expected Behavior

It not to crash.

Current Behavior

❯ v -autofree  run bug.v
Break on [main] main in bug.v:6
free(): double free detected in tcache 2
0x7f78cd87a62c: at ???: RUNTIME ERROR: abort() called
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
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0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
0x7f78cd7ea0e0: by ???
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Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.9 6ac1d08.f9106a8

Environment details (OS name and version, etc.)

V full version	V 0.4.9 6ac1d08.f9106a8
OS	linux, "Void Linux"
Processor	4 cpus, 64bit, little endian, Intel(R) Pentium(R) Gold 7505 @ 2.00GHz
Memory	16.47GB/23.16GB
V executable	/home/nopana/v/v
V last modified time	2025-01-16 19:06:29
V home dir	OK, value: /home/nopana/v
VMODULES	OK, value: /home/nopana/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	OK, value: /home/nopana/projects/tests
Git version	git version 2.47.1
V git status	weekly.2025.1-67-gf9106a86
.git/config present	true
cc version	cc (GCC) 13.2.0
gcc version	gcc (GCC) 13.2.0
clang version	N/A
tcc version	tcc version 0.9.28rc 2024-07-31 HEAD@1cee0908 (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 0134e9b9
emcc version	N/A
glibc version	ldd (GNU libc) 2.39

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[felipensp]

/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:5845: by _v_free
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:7676: by string_free
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:9767: by readline__Readline_refresh_line
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:9851: by readline__Readline_commit_line
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:9591: by readline__Readline_execute
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:9344: by readline__Readline_read_line_utf8
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:9363: by readline__Readline_read_line
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:10130: by v__debug__Debugger_read_line
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:10251: by v__debug__Debugger_interact
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:10414: by main__main
/tmp/v_1000/bug.01JHSW9VDH3ABKD8NMBQ6NSCAF.tmp.c:10476: by main

[huly-for-github]

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