[icu-support] Memory leak in icu3.6

[Kumar P. <kpr...@ad...>]

Hi,

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I have tried following sample code with DevPartner (for VC8) and found
the memory leaks.=20

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int main(void)

{

      // Test word breaking

      UErrorCode status =3D U_ZERO_ERROR;

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      BreakIterator *bi =3D
BreakIterator::createWordInstance(Locale("th"), status);

      UChar text[] =3D {0x0E19, 0x0E01, 0x0E1A, 0x0E19, 0x0E1A, 0x0E01,
0};

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      bi->setText(text);

      int32_t p =3D bi->first();

      printf("\n");

      while (p !=3D BreakIterator::DONE) {

            printf("Boundary at position %d\n", p);

            p =3D bi->next();

      }

      delete bi;

      u_cleanup();

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return 0;

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}

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Call stack shown is -

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     icu\source\common\cmemory.c (45): uprv_malloc_3_6

    source\common\uobject.cpp (60): icu_3_6::UMemory::operator new

    source\common\locid.cpp (163): icu_3_6::locale_set_default_internal

    source\common\locid.cpp (674): icu_3_6::Locale::getDefault

    source\common\locid.cpp (265): locale_get_default_3_6

    common\uloc.c (2009): uloc_getDefault_3_6

    source\common\uresbund.c (382): findFirstExisting

    source\common\uresbund.c (455): entryOpen

    source\common\uresbund.c (1867): ures_open_3_6

    source\common\brkiter.cpp (71):
icu_3_6::BreakIterator::buildInstance

    source\common\brkiter.cpp (416):
icu_3_6::BreakIterator::makeInstance

    source\common\brkiter.cpp (396):
icu_3_6::BreakIterator::createInstance

    source\common\brkiter.cpp (151):
icu_3_6::BreakIterator::createWordInstance

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I investigated a bit and found that memory was not being cleaned before
returning at line no 179 in locid.cpp. When I used
"ucln_common_registerCleanup(UCLN_COMMON_LOCALE, locale_cleanup);" at
line no 178 (before returning) and build icu again for testing, it works
fine and gives no memory leak.

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Is it a known problem? Can I go ahead with the solution mentioned above?

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Thanks,

Pratyush

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