[Bug 2049493] Re: Newer rustc version needed in jammy to build chromium updates

[Zixing Liu]

> Since I encountered the same error before and was able to overcome it
by manually removing all instances of that unstable option from the
build files, I'll try that strategy again. It is in general a boring
process because those options are generated during build and I couldn't
track down their originators; they are not to be found literally in the
source files, and so I removed them iteratively with a ad-hoc (and
rather embarrassing :p)

You have an easy option here:

There is a somewhat undocumented rustc feature where you could trick it
into thinking it is a nightly compiler: just add `RUSTC_BOOTSTRAP: 1`
under the `environment` section in your YAML file.

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https://bugs.launchpad.net/bugs/2049493

Title:
  Newer rustc version needed in jammy to build chromium updates

Status in chromium-browser package in Ubuntu:
  New
Status in rustc package in Ubuntu:
  New

Bug description:
  The next chromium version is making rustc mandatory to build. Chromium
  is a snap built from core22 so using the jammy packages, the build is
  currently failing because it needs libprofiler_builtins.rlib which
  isn't available.

  Upstream provides toolchain builds that can be used but only for amd64 so currently the snap is failing to build on arm
  https://launchpad.net/~chromium-team/+snap/chromium-snap-from-source-beta

  The version upstream is using is 1.75 but it's possible that a lower
  version would be enough for now if libprofiler was enabled

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