emitter: column width defaults to 140 #73719
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This commit modifies the column width computation in the emitter when `termize::dimensions` returns `None` so that it uses the default value of 140 (which is used in UI testing currently) instead of `usize::MAX` which just ends up causing overflows in later computations. This is hard to test but appears to produce the same output as using saturating functions instead. Signed-off-by: David Wood <david@davidtw.co>
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I'm slightly concerned that this is going to start affect You couldn't make a test for this because on tests it uses 140, and you can only override it with a specific number, not with an unbounded value. @bors r+ |
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📌 Commit 11a3584 has been approved by |
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@davidtwco would you have the time to drive rust-lang/cargo#7315 to completion? |
I should do, I'll familiarize myself with it. |
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Jun 25, 2020
…n-width, r=estebank emitter: column width defaults to 140 Fixes rust-lang#72509. This PR modifies the column width computation in the emitter when `termize::dimensions` returns `None` so that it uses the default value of 140 (which is used in UI testing currently) instead of `usize::MAX` which just ends up causing overflows in later computations. I also tried changing the computations which used `column_width` with their saturating equivalent, but the output appeared the same - so I decided to go with this approach because I feel like it's less likely to accidentally re-introduce an ICE like this in future (e.g. adding a non-saturating operation on `column_width` in future). I haven't added a test because I couldn't come up with a MCVE. I stumbled upon this running rustc-perf with the `piston-image` benchmark (running in tmux; it only happened with stage two builds only; and only when running through Cargo, not rustc directly with the same flags). In addition, given the nature of the issue, I don't know that we *could* write a UI test for this. Open to suggestions here though. r? @estebank
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Jun 26, 2020
…arth Rollup of 13 pull requests Successful merges: - rust-lang#72620 (Omit DW_AT_linkage_name when it is the same as DW_AT_name) - rust-lang#72967 (Don't move cursor in search box when using arrows to navigate results) - rust-lang#73102 (proc_macro: Stop flattening groups with dummy spans) - rust-lang#73297 (Support configurable deny-warnings for all in-tree crates.) - rust-lang#73507 (Cleanup MinGW LLVM linkage workaround) - rust-lang#73588 (Fix handling of reserved registers for ARM inline asm) - rust-lang#73597 (Record span of `const` kw in GenericParamKind) - rust-lang#73629 (Make AssocOp Copy) - rust-lang#73681 (Update Chalk to 0.14) - rust-lang#73707 (Fix links in `SliceIndex` documentation) - rust-lang#73719 (emitter: column width defaults to 140) - rust-lang#73729 (disable collectionbenches for android) - rust-lang#73748 (Add code block to code in documentation of `List::rebase_onto`) Failed merges: r? @ghost
flip1995
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Jul 14, 2020
…arth Rollup of 13 pull requests Successful merges: - rust-lang#72620 (Omit DW_AT_linkage_name when it is the same as DW_AT_name) - rust-lang#72967 (Don't move cursor in search box when using arrows to navigate results) - rust-lang#73102 (proc_macro: Stop flattening groups with dummy spans) - rust-lang#73297 (Support configurable deny-warnings for all in-tree crates.) - rust-lang#73507 (Cleanup MinGW LLVM linkage workaround) - rust-lang#73588 (Fix handling of reserved registers for ARM inline asm) - rust-lang#73597 (Record span of `const` kw in GenericParamKind) - rust-lang#73629 (Make AssocOp Copy) - rust-lang#73681 (Update Chalk to 0.14) - rust-lang#73707 (Fix links in `SliceIndex` documentation) - rust-lang#73719 (emitter: column width defaults to 140) - rust-lang#73729 (disable collectionbenches for android) - rust-lang#73748 (Add code block to code in documentation of `List::rebase_onto`) Failed merges: r? @ghost
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Fixes #72509.
This PR modifies the column width computation in the emitter when
termize::dimensionsreturnsNoneso that it uses the default value of 140 (which is used in UI testing currently) instead ofusize::MAXwhich just ends up causing overflows in later computations.I also tried changing the computations which used
column_widthwith their saturating equivalent, but the output appeared the same - so I decided to go with this approach because I feel like it's less likely to accidentally re-introduce an ICE like this in future (e.g. adding a non-saturating operation oncolumn_widthin future).I haven't added a test because I couldn't come up with a MCVE. I stumbled upon this running rustc-perf with the
piston-imagebenchmark (running in tmux; it only happened with stage two builds only; and only when running through Cargo, not rustc directly with the same flags). In addition, given the nature of the issue, I don't know that we could write a UI test for this. Open to suggestions here though.r? @estebank