diff --git a/src/librustc_trans/adt.rs b/src/librustc_trans/adt.rs index e091ba07d4fea..8ee362bae3551 100644 --- a/src/librustc_trans/adt.rs +++ b/src/librustc_trans/adt.rs @@ -688,9 +688,8 @@ pub fn trans_const<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>, t: Ty<'tcx>, discr: D let lldiscr = C_integral(Type::from_integer(ccx, d), discr.0 as u64, true); let mut vals_with_discr = vec![lldiscr]; vals_with_discr.extend_from_slice(vals); - let mut contents = build_const_struct(ccx, &variant, - &vals_with_discr[..]); - let needed_padding = l.size(dl).bytes() - variant.min_size.bytes(); + let mut contents = build_const_struct(ccx, &variant, &vals_with_discr[..]); + let needed_padding = l.size(dl).bytes() - variant.stride().bytes(); if needed_padding > 0 { contents.push(padding(ccx, needed_padding)); } @@ -703,8 +702,7 @@ pub fn trans_const<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>, t: Ty<'tcx>, discr: D } layout::Univariant { ref variant, .. } => { assert_eq!(discr, Disr(0)); - let contents = build_const_struct(ccx, - &variant, vals); + let contents = build_const_struct(ccx, &variant, vals); C_struct(ccx, &contents[..], variant.packed) } layout::Vector { .. } => { @@ -721,8 +719,7 @@ pub fn trans_const<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>, t: Ty<'tcx>, discr: D } layout::StructWrappedNullablePointer { ref nonnull, nndiscr, .. } => { if discr.0 == nndiscr { - C_struct(ccx, &build_const_struct(ccx, &nonnull, vals), - false) + C_struct(ccx, &build_const_struct(ccx, &nonnull, vals), false) } else { let fields = compute_fields(ccx, t, nndiscr as usize, false); let vals = fields.iter().map(|&ty| { @@ -730,8 +727,7 @@ pub fn trans_const<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>, t: Ty<'tcx>, discr: D // field; see #8506. C_null(type_of::sizing_type_of(ccx, ty)) }).collect::>(); - C_struct(ccx, &build_const_struct(ccx, &nonnull, &vals[..]), - false) + C_struct(ccx, &build_const_struct(ccx, &nonnull, &vals[..]), false) } } _ => bug!("trans_const: cannot handle type {} repreented as {:#?}", t, l) diff --git a/src/test/run-pass/issue-38002.rs b/src/test/run-pass/issue-38002.rs new file mode 100644 index 0000000000000..489d35e9147ad --- /dev/null +++ b/src/test/run-pass/issue-38002.rs @@ -0,0 +1,45 @@ +// Copyright 2016 The Rust Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +// Check that constant ADTs are translated OK, part k of N. + +#![feature(slice_patterns)] + +enum Bar { + C +} + +enum Foo { + A {}, + B { + y: usize, + z: Bar + }, +} + +const LIST: [(usize, Foo); 2] = [ + (51, Foo::B { y: 42, z: Bar::C }), + (52, Foo::B { y: 45, z: Bar::C }), +]; + +pub fn main() { + match LIST { + [ + (51, Foo::B { y: 42, z: Bar::C }), + (52, Foo::B { y: 45, z: Bar::C }) + ] => {} + _ => { + // I would want to print the enum here, but if + // the discriminant is garbage this causes an + // `unreachable` and silent process exit. + panic!("trivial match failed") + } + } +}