Ensure that if we copy file-names of log entries while startup
logging is active, we free them, but only once startup logging is
disabled, or on shutdown. This is needed to avoid crashes when
we use file-name copying for the Qt message handler.
Previous additional checks for a value BUILDING_LIST entry
used an enum incorrectly, resulting in all BUILDING_LIST entries
failing. Now fixed to check bad() / fail() which are bool.
Caching it complicates add/remove command logic, so making a simple
fix for now, which can be back-ported to 2020.2; ideally we would
cache the pointer but have an invalidation scheme, but that’s
considerably more work and risk.
Relates to Sentry crash:
https://sentry.io/organizations/flightgear/issues/1858764364
Spotted by valgrind, w00t. If you used a numerical formatter, such
as f,d or g, with. a nil value, we would read uninitialised data, and
generally get confused.
We had some confusion between two error codes, meaning we would log an
error (and treat as a failure) a pure ocean 1x1 area, even though this
was entirely correct and expected behaviour.
Terrasync.cxx expected REPO_ERROR_NOT_FOUND, we need to convert the
file-level error to that, and avoid logging a warning.
Fix various cases where re-init could get things blocked. Remove the
duplicate storage of the active paths; now we always check the primary
data, and hence it can’t be out of sync.
Also remove the obsolete persistent cache code.
Fixes some of the issues discussed in:
https://sourceforge.net/p/flightgear/codetickets/2308/
Further improvements still to come, especially to retry on a better
schedule for intermittent connections.
It seems that clang++ headers #include <version>, which found simgear/version
because we need to put singear/ in include path for some code to compile.
simgear/props/props_test.cxx: test for self-unregister.
SGPropertyNode::removeChangeListener() used to modify the _listeners vector or
even delete it and set _listeners to NULL, if a listener was removed.
This could cause a SEGV if removeChangeListener() was called from
a listener, because listeners are called from methods such as
SGPropertyNode::fireValueChanged() which iterate through _listeners and don't
expect it to be changed to NULL.
The fix here is to keep a track of whether we are iterating through the
_listeners vector; if we are, SGPropertyNode::removeChangeListener() sets the
entry to NULL, instead of removing it.
We have a new internal function forEachListener() which takes
care of the iterating details - incrementing/decrementing the new
_listeners->_num_iterators count and skipping NULL entries. Before returning,
if _num_iterators is now zero it removes any NULL entries in the vector of
listeners.
The nListeners() member is no longer inline, because it needs to ignore NULL
entries in the vector. And _listeners now points to an internally-defined
struct which contains a new _num_iterators as well as the vector of listeners.
Added self-unregister test to simgear/props/props_test.cxx.
