Unwelcome and unexpected output for tst_files6.c

[edhartnett]

nc_test4/tst_files6 has some nasty-looking output:

begin tst_files6.log
HDF5-DIAG: Error detected in HDF5 (1.10.4) thread 0:
  #000: H5O.c line 120 in H5Oopen(): unable to open object
    major: Object header
    minor: Can't open object
  #001: H5Oint.c line 596 in H5O__open_name(): unable to open object
    major: Object header
    minor: Can't open object
  #002: H5Oint.c line 551 in H5O_open_name(): object not found
    major: Object header
    minor: Object not found
  #003: H5Gloc.c line 422 in H5G_loc_find(): can't find object
    major: Symbol table
    minor: Object not found
  #004: H5Gtraverse.c line 851 in H5G_traverse(): internal path traversal failed
    major: Symbol table
    minor: Object not found
  #005: H5Gtraverse.c line 603 in H5G__traverse_real(): special link traversal failed
    major: Links
    minor: Link traversal failure
  #006: H5Gtraverse.c line 396 in H5G__traverse_special(): symbolic link traversal failed
    major: Links
    minor: Link traversal failure
  #007: H5Gtraverse.c line 327 in H5G__traverse_slink(): unable to follow symbolic link
    major: Symbol table
    minor: Object not found
  #008: H5Gtraverse.c line 627 in H5G__traverse_real(): traversal operator failed
    major: Symbol table
    minor: Callback failed
  #009: H5Gtraverse.c line 132 in H5G__traverse_slink_cb(): component not found
    major: Symbol table
    minor: Object not found
HDF5-DIAG: Error detected in HDF5 (1.10.4) thread 0:
  #000: H5L.c line 1138 in H5Literate(): link iteration failed
    major: Links
    minor: Iteration failed
  #001: H5L.c line 3440 in H5L__iterate(): link iteration failed
    major: Links
    minor: Iteration failed
  #002: H5Gint.c line 893 in H5G_iterate(): error iterating over links
    major: Symbol table
    minor: Iteration failed
  #003: H5Gobj.c line 698 in H5G__obj_iterate(): can't iterate over symbol table
    major: Symbol table
    minor: Iteration failed
  #004: H5Gstab.c line 557 in H5G__stab_iterate(): iteration operator failed
    major: Symbol table
    minor: Can't move to next iterator location
  #005: H5B.c line 1211 in H5B_iterate(): B-tree iteration failed
    major: B-Tree node
    minor: Iteration failed
  #006: H5B.c line 1167 in H5B__iterate_helper(): B-tree iteration failed
    major: B-Tree node
    minor: Iteration failed
  #007: H5Gnode.c line 1015 in H5G__node_iterate(): iteration operator failed
    major: Symbol table
    minor: Can't move to next iterator location
  #008: H5O.c line 120 in H5Oopen(): unable to open object
    major: Object header
    minor: Can't open object
  #009: H5Oint.c line 596 in H5O__open_name(): unable to open object
    major: Object header
    minor: Can't open object
  #010: H5Oint.c line 551 in H5O_open_name(): object not found
    major: Object header
    minor: Object not found
  #011: H5Gloc.c line 422 in H5G_loc_find(): can't find object
    major: Symbol table
    minor: Object not found
  #012: H5Gtraverse.c line 851 in H5G_traverse(): internal path traversal failed
    major: Symbol table
    minor: Object not found
  #013: H5Gtraverse.c line 603 in H5G__traverse_real(): special link traversal failed
    major: Links
    minor: Link traversal failure
  #014: H5Gtraverse.c line 396 in H5G__traverse_special(): symbolic link traversal failed
    major: Links
    minor: Link traversal failure
  #015: H5Gtraverse.c line 327 in H5G__traverse_slink(): unable to follow symbolic link
    major: Symbol table
    minor: Object not found
  #016: H5Gtraverse.c line 627 in H5G__traverse_real(): traversal operator failed
    major: Symbol table
    minor: Callback failed
  #017: H5Gtraverse.c line 132 in H5G__traverse_slink_cb(): component not found
    major: Symbol table
    minor: Object not found

*** Testing netcdf file functions some more.
*** testing Jeff Whitaker's test...ok.
*** testing HDF5 file with circular group structure...ok.
*** Tests successful!
end tst_files6.log
PASS: tst_files6

It's really fine, the test is correctly rejecting a HDF5 file with circular group links. But I'm not sure why we are seeing the HDF5 error messages. I will investigate.

[DennisHeimbigner]

I assume it means that somewhere, the nc_log level is set to 0 or greater.

[edhartnett]

Yes, just have to figure out what is going on and fix it. ;-)

[DennisHeimbigner]

Set a breakpoint in set_auto and see what the stack looks like.

[edhartnett]

OK, this was caused because of a special test I was doing calling H5close(). This causes HDF5 to forget the state of error printing. Fixed in a PR that's up now.