Use format string in bootstrap panic instead of a string directly #81910
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This fixes the following warning when compiling with nightly:
```
warning: panic message is not a string literal
--> src/bootstrap/builder.rs:1515:24
|
1515 | panic!(out);
| ^^^
|
= note: `#[warn(non_fmt_panic)]` on by default
= note: this is no longer accepted in Rust 2021
help: add a "{}" format string to Display the message
|
1515 | panic!("{}", out);
| ^^^^^
help: or use std::panic::panic_any instead
|
1515 | std::panic::panic_any(out);
| ^^^^^^^^^^^^^^^^^^^^^^
```
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Feb 10, 2021
Rollup of 11 pull requests Successful merges: - rust-lang#79849 (Clarify docs regarding sleep of zero duration) - rust-lang#80438 (Add `Box::into_inner`.) - rust-lang#81466 (Add suggest mut method for loop) - rust-lang#81687 (Make Vec::split_at_spare_mut public) - rust-lang#81904 (Bump stabilization version for const int methods) - rust-lang#81909 ([compiler/rustc_typeck/src/check/expr.rs] Remove unnecessary refs in pattern matching) - rust-lang#81910 (Use format string in bootstrap panic instead of a string directly) - rust-lang#81913 (Rename HIR UnOp variants) - rust-lang#81925 (Add long explanation for E0547) - rust-lang#81926 (add suggestion to use the `async_recursion` crate) - rust-lang#81951 (Update cargo) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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This fixes the following warning when compiling with nightly:
Found while working on #79540. cc #81645, which landed in 1.51.