Hi,

I'm trying to track down a leak with Devel::GC::Helper, but I keep getting 'Can't locate auto/DBI/FIRSTKEY.al'.

Playing with the source (Helper.xs) I determined that it happens during this call:

while (val = hv_iternext_flags((HV*) sstr, HV_ITERNEXT_WANTPLACEHOLDER
+S)) {

[download]

I'm not too familiar with the C side of perl, but from what I can tell DBI puts some magic on a hash (fake hash?), but doesn't implement some of the necessary iteration methods.

I've been trying to figure out how I can detect that this is about to happen and skip digging into that variable, but have been unsuccessful.

with this debug code:
    warn( "gc_note_sv12.2.1" );
    sv_dump( sstr );
    warn( "magic follows" );
    sv_dump( SvMAGIC(sstr) );
    while (val = hv_iternext_flags((HV*) sstr, HV_ITERNEXT_WANTPLACEHO
+LDERS)) {

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the last lines of output are:

gc_note_sv12.2.1 at testhelper.pl line 13.
SV = PVHV(0x9c99a30) at 0x9d19c7c
  REFCNT = 1
  FLAGS = (RMG,SHAREKEYS)
  IV = 0
  NV = 0
  MAGIC = 0x9de2398
    MG_VIRTUAL = &PL_vtbl_pack
    MG_TYPE = PERL_MAGIC_tied(P)
    MG_FLAGS = 0x02
      REFCOUNTED
    MG_OBJ = 0x9dd7520
        SV = RV(0x9cb4d30) at 0x9dd7520
          REFCNT = 1
          FLAGS = (ROK)
          RV = 0x9dd752c
  ARRAY = 0x0
  KEYS = 0
  FILL = 0
  MAX = 7
  RITER = -1
  EITER = 0x0
magic follows at testhelper.pl line 13.
SV = NULL(0x0) at 0x9de2398
  REFCNT = 6251956
  FLAGS = (FAKE,pNOK)

[download]
Do any of you gurus have an idea for how I can detect and skip that failure before entering the while loop?

Thanks,
Marcus

In reply to Devel::GC::Helper + DBI by marwatk

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