expand: Fix ICE on unimplemented RustcEncodable/Decodable derives#4437
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expand: Fix ICE on unimplemented RustcEncodable/Decodable derives#4437Pasta-coder wants to merge 1 commit intoRust-GCC:masterfrom
Pasta-coder wants to merge 1 commit intoRust-GCC:masterfrom
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When encountering `#[derive(RustcEncodable)]` or `RustcDecodable`, the `DeriveVisitor` previously fell through to `rust_unreachable ()`, causing an Internal Compiler Error. This patch adds cases for these built-in macros to explicitly emit a "sorry, unimplemented" message instead of crashing. Fixes Rust-GCC#3951 gcc/rust/ChangeLog: * expand/rust-derive.cc (DeriveVisitor::derive): Handle `BuiltinMacro::RustcEncodable` and `BuiltinMacro::RustcDecodable`. gcc/testsuite/ChangeLog: * rust/compile/issue-3951.rs: New test. Signed-off-by: jayant chauhan <0001jayant@gmail.com>
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Fixes #3951