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Fail on unrecognized debug option Refs: https://github.com/servo/servo/issues/7142 Ran some basic functional tests: ``` $ ./mach run -d -Z bubble-widths,disable-canvas-aa,trace-layout tests/ref/blur_ref.html $ ./mach run -d -Z help Usage: /Users/greg/servo/target/debug/servo debug option,[options,...] where options include Options: bubble-widths Bubble intrinsic widths separately like other engines. disable-text-aa Disable antialiasing of rendered text. disable-canvas-aa Disable antialiasing on the HTML canvas element. dump-flow-tree Print the flow tree after each layout. dump-display-list Print the display list after each layout. dump-display-list-json Print the display list in JSON form. dump-display-list-optimized Print optimized display list (at paint time). relayout-event Print notifications when there is a relayout. profile-tasks Instrument each task, writing the output to a file. show-compositor-borders Paint borders along layer and tile boundaries. show-fragment-borders Paint borders along fragment boundaries. show-parallel-paint Overlay tiles with colors showing which thread painted them. show-parallel-layout Mark which thread laid each flow out with colors. paint-flashing Overlay repainted areas with a random color. trace-layout Write layout trace to an external file for debugging. validate-display-list-geometry Display an error when display list geometry escapes overflow region. disable-share-style-cache Disable the style sharing cache. parallel-display-list-building Build display lists in parallel. replace-surrogates Replace unpaires surrogates in DOM strings with U+FFFD. See https://github.com/servo/servo/issues/6564 gc-profile Log GC passes and their durations. $ ./mach run -d -Z blah error: unrecognized debug option: blah Servo exited with return value 1 ``` Didn't check that setting debug flags actually did anything. Haven't written much Rust so this feels more verbose than necessary. Added `disable-canvas-aa` to debug options help. Should DebugOptions struct derive Clone like Opts does? <!-- Reviewable:start --> [<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7165) <!-- Reviewable:end --> |
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| compositing | ||
| devtools | ||
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| gfx | ||
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| layout | ||
| layout_traits | ||
| msg | ||
| net | ||
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| plugins | ||
| profile | ||
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| script | ||
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| servo | ||
| style | ||
| util | ||
| webdriver_server | ||
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