https://issues.dlang.org/show_bug.cgi?id=23965
Issue ID: 23965 Summary: [REG2.101.0] Appending deprecated structs in deprecated function causes deprecation message Product: D Version: D2 Hardware: All OS: All Status: NEW Keywords: rejects-valid Severity: regression Priority: P3 Component: dmd Assignee: nob...@puremagic.com Reporter: dlang-bugzi...@thecybershadow.net Generally, deprecated code can use other deprecated code without additional messages. This allows to bulk-deprecate interdependent code in a library, making it possible to allow the library to compile with no deprecation messages, but only causing them if something (non-deprecated) accesses the deprecated declarations. However, the following case has regressed in 2.101: //// test.d /// deprecated: struct S {} void fun() { S[] arr; arr ~= S(); } /////////////// Before it compiled with no errors or messages. Now, with -de, it fails with: /path/to/dmd.linux/dmd2/linux/bin64/../../src/druntime/import/core/internal/array/appending.d(#): Deprecation: struct `test.S` is deprecated test.d(8): instantiated from here: `_d_arrayappendcTXImpl!(S[], S)` /path/to/dmd.linux/dmd2/linux/bin64/../../src/druntime/import/core/internal/array/utils.d(#): Deprecation: struct `test.S` is deprecated /path/to/dmd.linux/dmd2/linux/bin64/../../src/druntime/import/core/internal/array/appending.d(#): instantiated from here: `_d_HookTraceImpl!(S[], _d_arrayappendcTX, "Cannot append to array if compiling without support for runtime type information!")` test.d(8): instantiated from here: `_d_arrayappendcTXImpl!(S[], S)` Introduced in https://github.com/dlang/dmd/pull/13495. --