Description:
Changed H5G_mkroot to be tolerant of files with symbol table information cached
but no symbol table in the root group. Also changed H5G_mkroot to properly
clean up in case of an error, and changed H5G_stab_is_valid to properly detect
errors in H5O_msg_read.
Tested: jam, linew, smirom (h5committest), jam (--disable-strict-format-checks)
Description:
Versions of the library between 1.3.0 and 1.6.3 have a bug which prevents them
from opening any file that does not have the root group's symbol table
information cached in the root group's entry in the superblock. Prior to 1.8
this was not an issue as this information was always cached. However, 1.8.0
stopped writing this information (which is not required by the file format
specification), and these older versions can therefore not read files created or
last written by versions 1.8.0 to 1.8.2. This fix modifies the library to once
again add this information to the superblock (when using the old file format).
Tested: jam, linew, smirom (h5committest)
