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emitter: current substitution can be multi-line #89912

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davidtwco
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Fixes #89280.

In splice_lines, there is some arithmetic to compute the required alignment such that future substitutions in a suggestion are aligned correctly. However, this assumed that the current substitution's span was only on a single line. In circumstances where this was not true, it could result in a arithmetic overflow when the substitution's end column was less than the substitution's start column.

r? @oli-obk

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Oct 15, 2021
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@davidtwco davidtwco force-pushed the issue-89280-split-lines-multiple-lines branch from 53f7ddd to 778d7cf Compare October 15, 2021 15:17
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In `splice_lines`, there is some arithmetic to compute the required
alignment such that future substitutions in a suggestion are aligned
correctly. However, this assumed that the current substitution's span
was only on a single line. In circumstances where this was not true, it
could result in a arithmetic overflow when the substitution's end
column was less than the substitution's start column.

Signed-off-by: David Wood <[email protected]>
@davidtwco davidtwco force-pushed the issue-89280-split-lines-multiple-lines branch from 778d7cf to d2dc0f3 Compare October 15, 2021 15:31
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oli-obk commented Oct 15, 2021

Thanks for doing this ❤️!

@bors r+ rollup

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bors commented Oct 15, 2021

📌 Commit d2dc0f3 has been approved by oli-obk

@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 Oct 15, 2021
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Oct 15, 2021
…ultiple-lines, r=oli-obk

emitter: current substitution can be multi-line

Fixes rust-lang#89280.

In `splice_lines`, there is some arithmetic to compute the required alignment such that future substitutions in a suggestion are aligned correctly. However, this assumed that the current substitution's span was only on a single line. In circumstances where this was not true, it could result in a arithmetic overflow when the substitution's end column was less than the substitution's start column.

r? `@oli-obk`
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Oct 15, 2021
…ultiple-lines, r=oli-obk

emitter: current substitution can be multi-line

Fixes rust-lang#89280.

In `splice_lines`, there is some arithmetic to compute the required alignment such that future substitutions in a suggestion are aligned correctly. However, this assumed that the current substitution's span was only on a single line. In circumstances where this was not true, it could result in a arithmetic overflow when the substitution's end column was less than the substitution's start column.

r? ``@oli-obk``
jackh726 added a commit to jackh726/rust that referenced this pull request Oct 16, 2021
…ultiple-lines, r=oli-obk

emitter: current substitution can be multi-line

Fixes rust-lang#89280.

In `splice_lines`, there is some arithmetic to compute the required alignment such that future substitutions in a suggestion are aligned correctly. However, this assumed that the current substitution's span was only on a single line. In circumstances where this was not true, it could result in a arithmetic overflow when the substitution's end column was less than the substitution's start column.

r? ```@oli-obk```
bors added a commit to rust-lang-ci/rust that referenced this pull request Oct 16, 2021
…askrgr

Rollup of 10 pull requests

Successful merges:

 - rust-lang#89509 (Stabilize `unreachable_unchecked` as `const fn`)
 - rust-lang#89898 (Remove alloc::prelude)
 - rust-lang#89902 (Restrict the aarch64 outline atomics test to Linux)
 - rust-lang#89906 (Moved format-version constant to rustdoc-json-types)
 - rust-lang#89912 (emitter: current substitution can be multi-line)
 - rust-lang#89914 (Emit impl difference error for GenericBoundFailure too)
 - rust-lang#89915 (Some outlives cleanup)
 - rust-lang#89918 (Add some GATs related regression tests)
 - rust-lang#89921 ([fuchsia] Update process info struct)
 - rust-lang#89925 (updating docs to mention usage of AtomicBool)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 27a7ced into rust-lang:master Oct 16, 2021
@rustbot rustbot added this to the 1.57.0 milestone Oct 16, 2021
@davidtwco davidtwco deleted the issue-89280-split-lines-multiple-lines branch October 16, 2021 09:36
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ICE: attempt to subtract with overflow, compiler/rustc_errors/src/lib.rs:348:47
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