valgrind

==2726510== Memcheck, a memory error detector
==2726510== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al.
==2726510== Using Valgrind-3.19.0 and LibVEX; rerun with -h for copyright info
==2726510== Command: ./xfonts
==2726510== 
==2726510== 
==2726510== HEAP SUMMARY:
==2726510==     in use at exit: 361,751 bytes in 10,547 blocks
==2726510==   total heap usage: 18,426 allocs, 7,879 frees, 5,002,386 bytes allocated
==2726510== 
==2726510== 288 (256 direct, 32 indirect) bytes in 1 blocks are definitely lost in loss record 192 of 320
==2726510==    at 0x4841888: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==2726510==    by 0x49E9F25: FcPatternObjectInsertElt (fcpat.c:525)
==2726510==    by 0x49EE180: FcPatternObjectAddWithBinding (fcpat.c:711)
==2726510==    by 0x49FC079: UnknownInlinedFun (fcpat.c:1258)
==2726510==    by 0x49FC079: UnknownInlinedFun (fcxml.c:3109)
==2726510==    by 0x49FC079: FcEndElement (fcxml.c:3234)
==2726510==    by 0x4D2E61E: doContent (xmlparse.c:3047)
==2726510==    by 0x4D2BCB3: UnknownInlinedFun (xmlparse.c:2612)
==2726510==    by 0x4D2BCB3: doProlog (xmlparse.c:4893)
==2726510==    by 0x4D2D7CC: prologProcessor (xmlparse.c:4598)
==2726510==    by 0x4D31879: XML_ParseBuffer (xmlparse.c:2009)
==2726510==    by 0x49F67E4: FcConfigParseAndLoadFromMemoryInternal.lto_priv.0 (fcxml.c:3544)
==2726510==    by 0x49F7136: _FcConfigParse.lto_priv.0 (fcxml.c:3679)
==2726510==    by 0x49F7319: UnknownInlinedFun (fcxml.c:3447)
==2726510==    by 0x49F7319: _FcConfigParse.lto_priv.0 (fcxml.c:3638)
==2726510==    by 0x49FA2F5: UnknownInlinedFun (fcxml.c:2606)
==2726510==    by 0x49FA2F5: FcEndElement (fcxml.c:3156)
==2726510== 
==2726510== LEAK SUMMARY:
==2726510==    definitely lost: 256 bytes in 1 blocks
==2726510==    indirectly lost: 32 bytes in 1 blocks
==2726510==      possibly lost: 0 bytes in 0 blocks
==2726510==    still reachable: 361,463 bytes in 10,545 blocks
==2726510==         suppressed: 0 bytes in 0 blocks
==2726510== Reachable blocks (those to which a pointer was found) are not shown.
==2726510== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==2726510== 
==2726510== For lists of detected and suppressed errors, rerun with: -s
==2726510== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)