Future incompatibility report: Future breakage diagnostic: warning: reference to packed field is unaligned --> $DIR/issue-27060-rpass.rs:15:13 | LL | let _ = &good.data; // ok | ^^^^^^^^^^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #82523 = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced) = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers) note: the lint level is defined here --> $DIR/issue-27060-rpass.rs:11:9 | LL | #[allow(unaligned_references)] | ^^^^^^^^^^^^^^^^^^^^ Future breakage diagnostic: warning: reference to packed field is unaligned --> $DIR/issue-27060-rpass.rs:16:13 | LL | let _ = &good.data2[0]; // ok | ^^^^^^^^^^^^^^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #82523 = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced) = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers) note: the lint level is defined here --> $DIR/issue-27060-rpass.rs:11:9 | LL | #[allow(unaligned_references)] | ^^^^^^^^^^^^^^^^^^^^ Future breakage diagnostic: warning: reference to packed field is unaligned --> $DIR/issue-27060-rpass.rs:18:13 | LL | let _ = &good.data; | ^^^^^^^^^^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #82523 = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced) = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers) note: the lint level is defined here --> $DIR/issue-27060-rpass.rs:11:9 | LL | #[allow(unaligned_references)] | ^^^^^^^^^^^^^^^^^^^^ Future breakage diagnostic: warning: reference to packed field is unaligned --> $DIR/issue-27060-rpass.rs:19:13 | LL | let _ = &good.data2[0]; | ^^^^^^^^^^^^^^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #82523 = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced) = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers) note: the lint level is defined here --> $DIR/issue-27060-rpass.rs:11:9 | LL | #[allow(unaligned_references)] | ^^^^^^^^^^^^^^^^^^^^