0d9a6edb50
Get with field index from pattern slice instead of directly indexing Closes #82772 r? ``@estebank`` https://github.com/rust-lang/rust/pull/82789#issuecomment-796921977 > ``@estebank`` So the real cause is we only generate single pattern for Box here615b03aeaa/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs (L1130-L1132)But in the replacing function, it tries to index on the 1-length pattern slice with field 1, thus out of bounds.615b03aeaa/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs (L1346)