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Fix ICE in MIR pretty printing #59036

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Merged
merged 1 commit into from
Mar 16, 2019
Merged

Fix ICE in MIR pretty printing #59036

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4 changes: 3 additions & 1 deletion src/librustc_mir/util/pretty.rs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
use rustc::hir::def_id::{DefId, LOCAL_CRATE};
use rustc::hir::def::CtorKind;
use rustc::mir::*;
use rustc::mir::visit::Visitor;
use rustc::ty::{self, TyCtxt};
Expand Down Expand Up @@ -597,7 +598,8 @@ fn write_mir_sig(
trace!("write_mir_sig: {:?}", src.instance);
let descr = tcx.describe_def(src.def_id());
let is_function = match descr {
Some(Def::Fn(_)) | Some(Def::Method(_)) | Some(Def::StructCtor(..)) => true,
Some(Def::Fn(_)) | Some(Def::Method(_)) | Some(Def::Variant(..)) |
Some(Def::StructCtor(_, CtorKind::Fn)) => true,
_ => tcx.is_closure(src.def_id()),
};
match (descr, src.promoted) {
Expand Down
18 changes: 18 additions & 0 deletions src/test/mir-opt/unusual-item-types.rs
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Expand Up @@ -7,11 +7,18 @@ impl A {
const ASSOCIATED_CONSTANT: i32 = 2;
}

// See #59021
enum Test {
X(usize),
Y { a: usize },
}
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Can you add the output mir below? It should be in a file with a name like build/x86_64-unknown-linux-gnu/test/mir-opt/unusual-item-types/rustc/Test-X.mir_map.0.mir

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Also add the following to verify that we won't ICE with struct-like variants.

pub enum Test2 {
    X { a: usize },
}

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👍 Added the tests


enum E {
V = 5,
}

fn main() {
let f = Test::X as fn(usize) -> Test;
let v = Vec::<i32>::new();
}

Expand Down Expand Up @@ -64,3 +71,14 @@ fn main() {
// _3 = const std::ops::Drop::drop(move _2) -> [return: bb6, unwind: bb5];
// }
// END rustc.ptr-real_drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir

// START rustc.Test-X.mir_map.0.mir
// fn Test::X(_1: usize) -> Test {
// let mut _0: Test;
//
// bb0: {
// _0 = Test::X(move _1,);
// return;
// }
// }
// END rustc.Test-X.mir_map.0.mir