Itamar eb6a15d52b LibCpp: Only store error messages for the main parser state ...

There's no need to store parser error messages for states with
depth > 0, as they will eventually be popped from the states stack and
their error messages will never be displayed to the user.

Profiling shows that this change reduces the % of backtraces that
contain the store_state & load_state functions from ~95% to ~70%.

Empirically this change reduces the time it takes on my machine for the
c++ language server to handle a file that #includes <LibGUI/Widget.h>
from ~14sec to ~4sec.

2021-07-13 23:20:09 +02:00

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