resolve_macro_to_def panics #43860
Description
rustc 1.19.0 (0ade33941 2017-07-17)
I have 3 crates
crate a:
#[proc_macro_derive(EthabiContract, attributes(ethabi_contract_options))]
pub fn ethabi_derive(input: TokenStream) -> TokenStream {
// do something
}crate b:
#[macro_export]
macro_rules! use_contract {
($name: ident, $path: expr) => {
#[derive(EthabiContract)]
#[ethabi_contract_options(path = $path)]
pub struct $name<T, C> {
api: T,
contract: C,
}
}
}crate c:
use_contract!(ContractName, file!());building crate c results in compiler panic
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'no entry found for key', src/libcore/option.rs:823
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
0: std::sys::imp::backtrace::tracing::imp::unwind_backtrace
1: std::panicking::default_hook::{{closure}}
2: std::panicking::default_hook
3: std::panicking::rust_panic_with_hook
4: std::panicking::begin_panic
5: std::panicking::begin_panic_fmt
6: rust_begin_unwind
7: core::panicking::panic_fmt
8: core::option::expect_failed
9: rustc_resolve::macros::<impl rustc_resolve::Resolver<'a>>::resolve_macro_to_def
10: rustc_resolve::macros::<impl syntax::ext::base::Resolver for rustc_resolve::Resolver<'a>>::resolve_invoc
11: syntax::ext::expand::MacroExpander::expand
12: syntax::ext::expand::MacroExpander::expand_crate
13: rustc_driver::driver::phase_2_configure_and_expand::{{closure}}
14: rustc_driver::driver::phase_2_configure_and_expand
15: rustc_driver::driver::compile_input
16: rustc_driver::run_compiler
error: Could not compile `ethabi_contract`.