[Bug regex/17069] leak in regcomp

[konstantin.s.serebryany at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17069

--- Comment #5 from Kostya Serebryany <konstantin.s.serebryany at gmail dot com> ---
Created attachment 7652
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7652&action=edit
build_charclass_op_leak.c

One more similarly looking leak, only differs in top frame: build_charclass_op

Direct leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x494a39 in calloc
/home/kcc/llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:95
    #1 0x7f8e3bed09da in build_charclass_op glibc-trunk/posix/regcomp.c:3598
    #2 0x7f8e3bed1e9e in parse_expression glibc-trunk/posix/regcomp.c:2393
    #3 0x7f8e3bed348f in parse_branch glibc-trunk/posix/regcomp.c:2193
    #4 0x7f8e3bed357d in parse_reg_exp glibc-trunk/posix/regcomp.c:2145
    #5 0x7f8e3bed39c8 in parse glibc-trunk/posix/regcomp.c:2114
    #6 0x7f8e3bed39c8 in re_compile_internal glibc-trunk/posix/regcomp.c:794
    #7 0x7f8e3bed4c10 in __regcomp glibc-trunk/posix/regcomp.c:501

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