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feature 'class' appears to leak opslabs · Issue #20812 · Perl/perl5 · GitHub
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Description
The first merge of feature 'class' turned out to have many memory leaks. Most of them are fixed by #20809.
With that in place most of the more basic tests no longer leak, but any field definition that includes a :param attribute or a = EXPR defaulting expression still does. In both cases the leak is visible in valgrind as:
==3139978== 16,136 (552 direct, 15,584 indirect) bytes in 1 blocks are definitely lost in loss record 6 of 6
==3139978== at 0x48407B4: malloc (vg_replace_malloc.c:381)
==3139978== by 0x153171: S_new_slab (op.c:254)
==3139978== by 0x1535DA: Perl_Slab_Alloc (op.c:346)
==3139978== by 0x16D01B: Perl_newSVOP (op.c:7572)
==3139978== by 0x225D01: S_pending_ident (toke.c:9967)
==3139978== by 0x22380B: Perl_yylex (toke.c:9592)
==3139978== by 0x23DF02: Perl_yyparse (perly.c:357)
==3139978== by 0x19E9DF: S_parse_body (perl.c:2614)
==3139978== by 0x19C54F: perl_parse (perl.c:1923)
==3139978== by 0x14E285: main (perlmain.c:106)
which suggests it's because an op gets allocated somewhere and isn't released again. But so far I haven't been able to find it.
rwp0
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