Memory Leak error in Nasm 3.01

[kittener]

Hello
Before submitting the actual bug details, I would like to mention that the link referenced in the documentation:
https://bugzilla.nasm.us/
currently appears unreachable (connection timeout / site not responding).
Therefore, I am reporting the issue here.

When I test my new fuzzer, I found a bug in the release version.

Environment

Tool(s): nasm
Version: 3.01

Platform: Linux version 5.4.0-200-generic (buildd@lcy02-amd64-023) (gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.2))

Build details (if relevant):

Built from: gcc

Compiler options: -g -fsanitize=address -fno-omit-frame-pointer

### Detailed Reports
Memory Leak in gmem.cc
Tool: nasm

Command line to reproduce:

nasm -M -MD /tmp/output.d -o /tmp/output.o crash1
Input file: crash1

Observed behavior:

==2023014==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 102 byte(s) in 1 object(s) allocated from:
#0 0x7f7bdfa2c808 in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cc:144
#1 0x5650186d61e7 in nasm_malloc ../nasmlib/alloc.c:25
#2 0x56501864d178 in dup_Token ../asm/preproc.c:2111
#3 0x56501866411f in expand_smacro_noreset ../asm/preproc.c:6549
#4 0x56501864f7b5 in tlist_filename ../asm/preproc.c:2644
#5 0x56501864fc83 in pp_do_depend ../asm/preproc.c:2699
#6 0x565018659afa in do_directive ../asm/preproc.c:4720
#7 0x56501867006f in pp_tokline ../asm/preproc.c:8748
#8 0x5650186705ce in pp_getline ../asm/preproc.c:8803
#9 0x5650186173c4 in main ../asm/nasm.c:591
#10 0x7f7bdf735082 in __libc_start_main ../csu/libc-start.c:308

SUMMARY: AddressSanitizer: 102 byte(s) leaked in 1 allocation(s).

By
Kaiyu xie,
Institute of Information Engineering，Chinese Academy of Sciences

[kittener]

Here is the crash1