quote!(false) produces a different set of tokens than parsing the string "false"

[mystor]

extern crate syn;
#[macro_use]
extern crate quote;

use quote::ToTokens;

fn main() {
    println!("{:?}", syn::parse_str::<syn::Expr>("false").unwrap().into_tokens().into_iter().next().unwrap());
    println!("{:?}", quote!(false).into_iter().next().unwrap());
}

output:

$ cargo run
   Compiling syn_test_0 v0.1.0 (file:///home/mlayzell/Code/syn_test_0)
    Finished dev [unoptimized + debuginfo] target(s) in 0.97 secs
     Running `target/debug/syn_test_0`
TokenTree { span: Span, kind: Term(Term("false")) }
TokenTree { span: Span, kind: Literal(Literal("false")) }

From @dtolnay and I talking on IRC, the correct output is Term and not Literal.

[dtolnay]

Running the same thing in a proc macro with proc-macro2/nightly they are both Term, so I guess that is the right answer.

#[proc_macro]
pub fn bug(_input: TokenStream) -> TokenStream {
    println!("{:?}", syn::parse_str::<syn::Expr>("false").unwrap().into_tokens().into_iter().next().unwrap());
    println!("{:?}", quote!(false).into_iter().next().unwrap());
    TokenStream::empty()
}

TokenTree { span: Span(Span { lo: BytePos(5829957), hi: BytePos(5829962), ctxt: #0 }), kind: Term(Term(false)) }
TokenTree { span: Span(Span { lo: BytePos(118), hi: BytePos(133), ctxt: #3 }), kind: Term(Term(false)) }

[mystor]

This is actually a bug in proc_macro2 so closing in favour of dtolnay/proc-macro2#51