If synchronize-[at|after] used a lookahead symbol different from the last lookahead symbol (e.g., normal parsing used a literal, recovery a regexp), synchronization would clobber the lookahead symbol so that after successful synchronization normal parsing could still not succeed.
This patch sets up dedicated parser state for synchronization to prevent the clobbering.
If
synchronize-[at|after]used a lookahead symbol different from the last lookahead symbol (e.g., normal parsing used a literal, recovery a regexp), synchronization would clobber the lookahead symbol so that after successful synchronization normal parsing could still not succeed.This patch sets up dedicated parser state for synchronization to prevent the clobbering.
Closes #1774.