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Allow disabling TrapUnreachable via -Ztrap-unreachable=no #79367

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merged 1 commit into from Nov 24, 2020

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Dirbaio
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@Dirbaio Dirbaio commented Nov 24, 2020

Currently this is only possible by defining a custom target, which is quite unwieldy.

This is useful for embedded targets where small code size is desired. For example, on my project (thumbv7em-none-eabi) this yields a 0.6% code size reduction: 132892 bytes -> 132122 bytes (770 bytes down).

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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @davidtwco (or someone else) soon.

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Nov 24, 2020
This is useful for embedded targets where small code size is desired.
For example, on my project (thumbv7em-none-eabi) this yields a 0.6% code size reduction.
@jonas-schievink
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Looks reasonable, thanks!

@bors r+

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bors commented Nov 24, 2020

📌 Commit 7b62e09 has been approved by jonas-schievink

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Nov 24, 2020
@jonas-schievink jonas-schievink added the WG-embedded Working group: Embedded systems label Nov 24, 2020
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Nov 24, 2020
…chievink

Allow disabling TrapUnreachable via -Ztrap-unreachable=no

Currently this is only possible by defining a custom target, which is quite unwieldy.

This is useful for embedded targets where small code size is desired. For example, on my project (thumbv7em-none-eabi) this yields a 0.6% code size reduction: 132892 bytes -> 132122 bytes (770 bytes down).
bors added a commit to rust-lang-ci/rust that referenced this pull request Nov 24, 2020
…as-schievink

Rollup of 10 pull requests

Successful merges:

 - rust-lang#76858 (Add exploit mitigations chapter to the rustc book)
 - rust-lang#79310 (Make `fold_item_recur` non-nullable)
 - rust-lang#79312 (Get rid of `doctree::Impl`)
 - rust-lang#79321 (Accept '!' in intra-doc links)
 - rust-lang#79346 (Allow using `-Z fewer-names=no` to retain value names)
 - rust-lang#79351 (Fix typo in `keyword` docs for traits)
 - rust-lang#79354 (BTreeMap: cut out the ceremony around BoxedNode)
 - rust-lang#79358 (BTreeMap/BTreeSet: make public doc more consistent)
 - rust-lang#79367 (Allow disabling TrapUnreachable via -Ztrap-unreachable=no)
 - rust-lang#79374 (Add note to use nightly when using expr in const generics)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 95e7af3 into rust-lang:master Nov 24, 2020
@rustbot rustbot added this to the 1.50.0 milestone Nov 24, 2020
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6 participants