diff options
| author | Ralf Jung <post@ralfj.de> | 2022-08-06 17:18:59 -0400 |
|---|---|---|
| committer | Ralf Jung <post@ralfj.de> | 2022-08-06 18:31:59 -0400 |
| commit | 3c8563abcf91eda340aa77d238954dd00fa0cb34 (patch) | |
| tree | d7e3ee5ab863b63b9379a90e3542c4940a54cb47 /compiler/rustc_codegen_ssa | |
| parent | affe0d3a00e92fa7885e3f5d2c5073fde432d154 (diff) | |
| download | rust-3c8563abcf91eda340aa77d238954dd00fa0cb34.tar.gz rust-3c8563abcf91eda340aa77d238954dd00fa0cb34.zip | |
make NOP dyn casts not require anything about the vtable
Diffstat (limited to 'compiler/rustc_codegen_ssa')
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/base.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs index a840b270974..4c6be3f9108 100644 --- a/compiler/rustc_codegen_ssa/src/base.rs +++ b/compiler/rustc_codegen_ssa/src/base.rs @@ -151,6 +151,7 @@ pub fn unsized_info<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( let old_info = old_info.expect("unsized_info: missing old info for trait upcasting coercion"); if data_a.principal_def_id() == data_b.principal_def_id() { + // A NOP cast that doesn't actually change anything, should be allowed even with invalid vtables. return old_info; } |