[Pkg-rust-maintainers] Bug#1124769: Bug#1124769: rustc: FTBFS rustc in Debian Bookworm because of conflict in build deps

[Huw Jones]

Hi,

I’ve just hit this trying to build rustc 1.85.1 now that rust-web got pulled into the latest Trixie point release.

~/rustc $ sudo apt build-dep -o Debug::pkgProblemResolver=1 --dry-run .

Note, using directory '.' to get the build dependencies
Starting pkgProblemResolver with broken count: 1
Starting 2 pkgProblemResolver with broken count: 1
Investigating (0) rustc-web:arm64 < none -> 1.96.0+dfsg1-1~deb13u1+b1 @un uN Ib >
Broken rustc-web:arm64 Conflicts on rustc:arm64 < none -> 1.85.0+dfsg3-1+pexip25u2 @un puN >
  Conflicts//Breaks against version 1.85.1+dfsg1-1+deb13u1 for rustc but that is not InstVer, ignoring
  Considering rustc:arm64 -2 as a solution to rustc-web:arm64 2
Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

Unsatisfied dependencies:
 rustc-web : Conflicts: rustc
Error: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.


And the info about rustc-web

~/rustc $ apt-cache show rustc-web
Package: rustc-web
Source: rustc-web (1.96.0+dfsg1-1~deb13u1)
Version: 1.96.0+dfsg1-1~deb13u1+b1
Installed-Size: 12228
Maintainer: Debian Rust Maintainers <pkg-rust-maintainers at alioth-lists.debian.net>
Architecture: arm64
Replaces: libstd-rust-dev (<< 1.25.0+dfsg1-2~~), rustc, rustc-mozilla
Provides: rustc (= 1.96.0+dfsg1-1~deb13u1+b1)
Depends: libc6 (>= 2.34), libgcc-s1 (>= 3.0), libstd-rust-web-dev (= 1.96.0+dfsg1-1~deb13u1+b1), gcc, libc-dev, binutils (>= 2.26)
Recommends: cargo-web (= 1.96.0+dfsg1-1~deb13u1+b1), rust-web-llvm
Conflicts: rustc, rustc-mozilla, rustup
Breaks: libstd-rust-dev (<< 1.25.0+dfsg1-2~~)

Kind regards,
Huw Jones
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