Fix occasional bootstrap panic in docs. #74124
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No, the last line is just command execution and is a no-op during dry run. Thanks! @bors r+ |
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…=Mark-Simulacrum Fix occasional bootstrap panic in docs. I am occasionally running into this panic when running `x.py`: > thread 'main' panicked at 'source "/Users/eric/Proj/rust/rust/build/x86_64-apple-darwin/md-doc/unstable-book" failed to get metadata: No such file or directory (os error 2)', src/build_helper/lib.rs:173:19 I have not been able to figure out the exact sequence of commands that leads to this error (I tried for quite a while to reproduce it). I think it may involve updating my tree, but I am uncertain. An artificial way to trigger it is to build the documentation, and then delete the `md-doc` directory manually. The cause is that bootstrap does a "dry run" before every command, and in this case `up_to_date` panics because the destination exists (`build/x86_64-apple-darwin/doc/unstable-book/index.html `) but the source does not (`build/x86_64-apple-darwin/md-doc/unstable-book`). I am uncertain if it is important that the last line `builder.run(…)` needs to be called during the dry run. This patch seems to fix the issue, though.
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…=Mark-Simulacrum Fix occasional bootstrap panic in docs. I am occasionally running into this panic when running `x.py`: > thread 'main' panicked at 'source "/Users/eric/Proj/rust/rust/build/x86_64-apple-darwin/md-doc/unstable-book" failed to get metadata: No such file or directory (os error 2)', src/build_helper/lib.rs:173:19 I have not been able to figure out the exact sequence of commands that leads to this error (I tried for quite a while to reproduce it). I think it may involve updating my tree, but I am uncertain. An artificial way to trigger it is to build the documentation, and then delete the `md-doc` directory manually. The cause is that bootstrap does a "dry run" before every command, and in this case `up_to_date` panics because the destination exists (`build/x86_64-apple-darwin/doc/unstable-book/index.html `) but the source does not (`build/x86_64-apple-darwin/md-doc/unstable-book`). I am uncertain if it is important that the last line `builder.run(…)` needs to be called during the dry run. This patch seems to fix the issue, though.
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I am occasionally running into this panic when running
x.py:I have not been able to figure out the exact sequence of commands that leads to this error (I tried for quite a while to reproduce it). I think it may involve updating my tree, but I am uncertain. An artificial way to trigger it is to build the documentation, and then delete the
md-docdirectory manually.The cause is that bootstrap does a "dry run" before every command, and in this case
up_to_datepanics because the destination exists (build/x86_64-apple-darwin/doc/unstable-book/index.html) but the source does not (build/x86_64-apple-darwin/md-doc/unstable-book).I am uncertain if it is important that the last line
builder.run(…)needs to be called during the dry run. This patch seems to fix the issue, though.