syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     //   A real issue is __aulldiv() is referred by __udivdi3() - udivmod_inner!(), from
context_before:     //   _alldiv, _aulldiv, _allrem, _aullrem, _allmul, which will cause undefined symbol.
context_after:     //   https://github.com/rust-lang-nursery/compiler-builtins.