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When compiling without a specified --edition, emit a note#158102

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estebank:note-default-edition
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When compiling without a specified --edition, emit a note#158102
estebank wants to merge 3 commits into
rust-lang:mainfrom
estebank:note-default-edition

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@estebank estebank commented Jun 18, 2026

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@rustbot rustbot added A-compiletest Area: The compiletest test runner A-run-make Area: port run-make Makefiles to rmake.rs A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. labels Jun 18, 2026
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estebank commented Jun 18, 2026

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I'll try to write an MCP later (unless someone does it for me). This change was motivated after seeing https://internals.rust-lang.org/t/code-compiles-on-playground-but-fails-when-passed-via-stdin-to-rustc/24393 where the different defaults between cargo, playground and rustc caused people to get confused.

@estebank estebank force-pushed the note-default-edition branch from b923a75 to 2a486d3 Compare June 18, 2026 20:41
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A-compiletest Area: The compiletest test runner A-run-make Area: port run-make Makefiles to rmake.rs A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.

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