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run-make -Zbuild-std tests fail on compiler_builtins on older branches #130634

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cuviper opened this issue Sep 20, 2024 · 8 comments · Fixed by #130642
Closed

run-make -Zbuild-std tests fail on compiler_builtins on older branches #130634

cuviper opened this issue Sep 20, 2024 · 8 comments · Fixed by #130642
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-Zbuild-std Unstable Cargo option: Compile the standard library yourself. A-testsuite Area: The testsuite used to check the correctness of rustc C-bug Category: This is a bug.

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@cuviper
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cuviper commented Sep 20, 2024

I tried: merging backports on 1.82-beta (#130569)

I expected to see this happen: Test successful

Instead, this happened: The job dist-various-1 failed!

failures:
    [run-make] tests/run-make/compiler-builtins
    [run-make] tests/run-make/thumb-none-cortex-m

Both tests use -Zbuild-std and failed to build compiler_builtins v0.1.126:

error[E0433]: failed to resolve: could not find `naked_asm` in `arch`
##[error]  --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/compiler_builtins-0.1.126/src/arm.rs:26:21
   |
26 |         core::arch::naked_asm!(
   |                     ^^^^^^^^^ could not find `naked_asm` in `arch`

error[E0433]: failed to resolve: could not find `naked_asm` in `arch`
##[error]  --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/compiler_builtins-0.1.126/src/arm.rs:39:21
   |
39 |         core::arch::naked_asm!(
   |                     ^^^^^^^^^ could not find `naked_asm` in `arch`

error[E0433]: failed to resolve: could not find `naked_asm` in `arch`
##[error]  --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/compiler_builtins-0.1.126/src/arm.rs:54:21
   |
54 |         core::arch::naked_asm!(
   |                     ^^^^^^^^^ could not find `naked_asm` in `arch`

error[E0433]: failed to resolve: could not find `naked_asm` in `arch`
##[error]  --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/compiler_builtins-0.1.126/src/arm.rs:66:21
   |
66 |         core::arch::naked_asm!(
   |                     ^^^^^^^^^ could not find `naked_asm` in `arch`

Note that beta's library/Cargo.lock only has compiler_builtins v0.1.123, so it appears cargo isn't heeding that with -Zbuild-std.

arch::naked_asm! was added in #130146 and started being used in rust-lang/compiler-builtins#686 for 0.1.126.

To unblock beta, I'm going to add //@ only-nightly to those tests, as suggested on my PR, especially since -Zbuild-std is unstable anyway. This particular failure shouldn't be an issue when the current nightlies are promoted to the next beta, but we should think about this kind of failure mode in the long term too.

@cuviper cuviper added the C-bug Category: This is a bug. label Sep 20, 2024
@rustbot rustbot added the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Sep 20, 2024
@workingjubilee
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We should probably add a test using the beta compiler to the compiler_builtins CI.

cuviper added a commit to cuviper/rust that referenced this issue Sep 20, 2024
@workingjubilee
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We could also add running the beta compiler with -Zbuild-std to rust-lang/rust's CI?

@cuviper
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cuviper commented Sep 20, 2024

I think this kind of thing would also be an issue once we get to the stable promotion. I don't know if compiler_builtins wants to promise any kind of MSRV, but really I would have expected the library lock file to be used.

@saethlin
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I'm very surprised there isn't a lockfile being used here. Does -Zbuild-std not use one automatically? Should be modify the tests to cp in the one from library/Cargo.lock?

@workingjubilee
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well at least now libstd has its own lockfile, so that makes things easier.

@cuviper
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cuviper commented Sep 20, 2024

Those run-make tests are using stage0 cargo, which is 1.81.0 on the beta branch, and @weihanglo pointed out that this version doesn't have the logic to find the relatively new library/Cargo.lock.

Maybe run-make should always use the current stage's cargo as a prereq? (i.e. the same stage as rustc)

@saethlin saethlin added A-testsuite Area: The testsuite used to check the correctness of rustc and removed needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. labels Sep 20, 2024
@saethlin
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Maybe run-make should always use the current stage's cargo as a prereq? (i.e. the same stage as rustc)

Definitely. I thought using bootstrap cargo was sus when I wrote that but I had already spent a lot of time trying to get any cargo to run.

@fmease fmease added the -Zbuild-std Unstable Cargo option: Compile the standard library yourself. label Sep 20, 2024
@jieyouxu
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jieyouxu commented Sep 21, 2024

Maybe run-make should always use the current stage's cargo as a prereq?

Yes, I should've done that even if bootstrap cargo somehow worked

@bors bors closed this as completed in 4336628 Sep 21, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this issue Sep 21, 2024
Rollup merge of rust-lang#130642 - cuviper:run-make-cargo, r=jieyouxu

Pass the current cargo to `run-make` tests

A couple tests were using `BOOTSTRAP_CARGO` with `-Zbuild-std`, but that
stage0 cargo might not always be in sync with in-tree changes. In
particular, those tests started failing on the beta branch because the
older cargo couldn't find the library `Cargo.lock`, and then couldn't
build the latest version of `compiler_builtins` that had nightly changes.

Fixes rust-lang#130634
r? `@saethlin`
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Oct 2, 2024
…r-ozkan

Revert rust-lang#131060 "Drop conditionally applied cargo `-Zon-broken-pipe=kill` flags"

In [rust-lang#131059] we found out that `-Zon-broken-pipe=kill` is actually **load-bearing**[^1] for
(at least) `rustc` and `rustdoc` to have the kill-process-on-broken-pipe behavior, e.g. `rustc
--print=sysroot | false` will ICE and `rustdoc --print=sysroot | false` will panic on a broken pipe.

This PR reverts 5a7058c (reverts PR rust-lang#131060) in favor of a future
fix to *unconditionally* apply `-Zon-broken-pipe=kill` to tool builds and also not drop the
`-Zon-broken-pipe=kill` flag for rustc binary builds.

I could not figure out how to write a regression test for the `rustc --print=sysroot | false`
behavior on Unix, so this is a plain revert for now.

This revert will unfortunately reintroduce rust-lang#130980 until we fix it again with the different approach.

See more details at <rust-lang#131059 (comment)> and in the timeline below.

### Timeline of kill-process-on-broken-pipe behavior changes

See [`unix_sigpipe` tracking issue rust-lang#97889][rust-lang#97889] for more context around unix sigpipe handling.

- From the very beginning since 2014, Rust binaries by default use `sig_ign`. This meant that if
  output pipe is broken yet the program tries to use `println!` and such, there will be a broken
  pipe panic from std. This lead to ICEs from e.g. `rustc --help | false` [rust-lang#34376].
- [rust-lang#49606] mitigated [rust-lang#34376] by adding an explicit signal handler to `rustc_driver` register a
  sigpipe handler with `SIG_DFL` which will cause the binary using `rustc_driver` to terminate if
  `rustc_driver::set_sigpipe_handler()` is called. `rustc`'s main binary wrapper uses
  `rustc_driver::set_sigpipe_handler()`, and so does `rustdoc`.
- A more universal way to set sigpipe behavior for Unix was introduced as part of [rust-lang#97889], i.e. `#
  [unix_sigpipe = "sig_dfl"]` attribute.
- [rust-lang#102587] migrated `rustc` to use `#[unix_sigpipe = "sig_dfl"]` instead of
  `rustc_driver::set_sigpipe_handler`.
- [rust-lang#103495] migrated `rustdoc` to use `#[unix_sigpipe = "sig_dfl"]` instead of
  `rustc_driver::set_sigpipe_handler`. `rustc_driver::set_sigpipe_handler` was removed.
- Following concerns about sigpipe setting UI in [rust-lang#97889], the UI for specifying sigpipe behavior
  was changed in [rust-lang#124480] from `#[unix_sigpipe = "sig_dfl"]` attribute to the commmand line flag
  `-Zon-broken-pipe=kill`.
    - In the same PR, `#[unix_sigpipe = "sig_dfl"]` were removed from `rustc` and `rustdoc` main
      binary crate entry points in favor of the command line flag. Kill-process-on-broken-pipe
      behavior was preserved by adding `-Zon-broken-pipe=kill` for `rustdoc` tool build step and
      `rustc` during compile steps.
- [rust-lang#126934] added `-Zon-broken-pipe=kill` for tool builds *except* for cargo to help with some miri
  tests because at the time the PR was written, this would lead to a couple of cargo test failures.
  Conditionally setting `RUSTFLAGS` can lead to tool build invalidation, e.g. building `cargo`
  without `-Zon-broken-pipe=kill` but `clippy` with the flag can lead to invalidation of the tool
  build cache. This is not a problem at the time, because nothing (not even miri) tests built stage
  1 cargo (all used initial cargo).
- In [rust-lang#130634] we found out that `run-make` tests like `compiler-builtins` needed stage 1 cargo, not
  just beta bootstrap cargo, because there can be changes that are present in stage 1 cargo but
  absent in beta cargo, which was blocking a beta backport.
- [rust-lang#130642] and later [rust-lang#130739] now build stage 1 cargo. And as previously mentioned, since
  `-Zon-broken-pipe=kill` was specifically *not* set for cargo, this caused tool build cache
  invalidation meaning rebuilds of stage 1 even if nothing in source was changed due to differing
  `RUSTFLAGS` since `run-make` also builds `rustdoc` and such [rust-lang#130980].

[rust-lang#34376]: rust-lang#34376
[rust-lang#49606]: rust-lang#49606
[rust-lang#97889]: rust-lang#97889
[rust-lang#102587]: rust-lang#102587
[rust-lang#103495]: rust-lang#103495
[rust-lang#124480]: rust-lang#124480
[rust-lang#130634]: rust-lang#130634
[rust-lang#130642]: rust-lang#130642
[rust-lang#130739]: rust-lang#130739
[rust-lang#130980]: rust-lang#130980
[rust-lang#131059]: rust-lang#131059
[^1]: rust-lang#131059 (comment)

r? `@onur-ozkan` (or bootstrap)
workingjubilee added a commit to workingjubilee/rustc that referenced this issue Oct 2, 2024
…r-ozkan

Revert rust-lang#131060 "Drop conditionally applied cargo `-Zon-broken-pipe=kill` flags"

In [rust-lang#131059] we found out that `-Zon-broken-pipe=kill` is actually **load-bearing**[^1] for
(at least) `rustc` and `rustdoc` to have the kill-process-on-broken-pipe behavior, e.g. `rustc
--print=sysroot | false` will ICE and `rustdoc --print=sysroot | false` will panic on a broken pipe.

This PR reverts 5a7058c (reverts PR rust-lang#131060) in favor of a future
fix to *unconditionally* apply `-Zon-broken-pipe=kill` to tool builds and also not drop the
`-Zon-broken-pipe=kill` flag for rustc binary builds.

I could not figure out how to write a regression test for the `rustc --print=sysroot | false`
behavior on Unix, so this is a plain revert for now.

This revert will unfortunately reintroduce rust-lang#130980 until we fix it again with the different approach.

See more details at <rust-lang#131059 (comment)> and in the timeline below.

### Timeline of kill-process-on-broken-pipe behavior changes

See [`unix_sigpipe` tracking issue rust-lang#97889][rust-lang#97889] for more context around unix sigpipe handling.

- From the very beginning since 2014, Rust binaries by default use `sig_ign`. This meant that if
  output pipe is broken yet the program tries to use `println!` and such, there will be a broken
  pipe panic from std. This lead to ICEs from e.g. `rustc --help | false` [rust-lang#34376].
- [rust-lang#49606] mitigated [rust-lang#34376] by adding an explicit signal handler to `rustc_driver` register a
  sigpipe handler with `SIG_DFL` which will cause the binary using `rustc_driver` to terminate if
  `rustc_driver::set_sigpipe_handler()` is called. `rustc`'s main binary wrapper uses
  `rustc_driver::set_sigpipe_handler()`, and so does `rustdoc`.
- A more universal way to set sigpipe behavior for Unix was introduced as part of [rust-lang#97889], i.e. `#
  [unix_sigpipe = "sig_dfl"]` attribute.
- [rust-lang#102587] migrated `rustc` to use `#[unix_sigpipe = "sig_dfl"]` instead of
  `rustc_driver::set_sigpipe_handler`.
- [rust-lang#103495] migrated `rustdoc` to use `#[unix_sigpipe = "sig_dfl"]` instead of
  `rustc_driver::set_sigpipe_handler`. `rustc_driver::set_sigpipe_handler` was removed.
- Following concerns about sigpipe setting UI in [rust-lang#97889], the UI for specifying sigpipe behavior
  was changed in [rust-lang#124480] from `#[unix_sigpipe = "sig_dfl"]` attribute to the commmand line flag
  `-Zon-broken-pipe=kill`.
    - In the same PR, `#[unix_sigpipe = "sig_dfl"]` were removed from `rustc` and `rustdoc` main
      binary crate entry points in favor of the command line flag. Kill-process-on-broken-pipe
      behavior was preserved by adding `-Zon-broken-pipe=kill` for `rustdoc` tool build step and
      `rustc` during compile steps.
- [rust-lang#126934] added `-Zon-broken-pipe=kill` for tool builds *except* for cargo to help with some miri
  tests because at the time the PR was written, this would lead to a couple of cargo test failures.
  Conditionally setting `RUSTFLAGS` can lead to tool build invalidation, e.g. building `cargo`
  without `-Zon-broken-pipe=kill` but `clippy` with the flag can lead to invalidation of the tool
  build cache. This is not a problem at the time, because nothing (not even miri) tests built stage
  1 cargo (all used initial cargo).
- In [rust-lang#130634] we found out that `run-make` tests like `compiler-builtins` needed stage 1 cargo, not
  just beta bootstrap cargo, because there can be changes that are present in stage 1 cargo but
  absent in beta cargo, which was blocking a beta backport.
- [rust-lang#130642] and later [rust-lang#130739] now build stage 1 cargo. And as previously mentioned, since
  `-Zon-broken-pipe=kill` was specifically *not* set for cargo, this caused tool build cache
  invalidation meaning rebuilds of stage 1 even if nothing in source was changed due to differing
  `RUSTFLAGS` since `run-make` also builds `rustdoc` and such [rust-lang#130980].

[rust-lang#34376]: rust-lang#34376
[rust-lang#49606]: rust-lang#49606
[rust-lang#97889]: rust-lang#97889
[rust-lang#102587]: rust-lang#102587
[rust-lang#103495]: rust-lang#103495
[rust-lang#124480]: rust-lang#124480
[rust-lang#130634]: rust-lang#130634
[rust-lang#130642]: rust-lang#130642
[rust-lang#130739]: rust-lang#130739
[rust-lang#130980]: rust-lang#130980
[rust-lang#131059]: rust-lang#131059
[^1]: rust-lang#131059 (comment)

r? ``@onur-ozkan`` (or bootstrap)
rust-timer added a commit to rust-lang-ci/rust that referenced this issue Oct 2, 2024
Rollup merge of rust-lang#131108 - jieyouxu:revert-broken-pipe, r=onur-ozkan

Revert rust-lang#131060 "Drop conditionally applied cargo `-Zon-broken-pipe=kill` flags"

In [rust-lang#131059] we found out that `-Zon-broken-pipe=kill` is actually **load-bearing**[^1] for
(at least) `rustc` and `rustdoc` to have the kill-process-on-broken-pipe behavior, e.g. `rustc
--print=sysroot | false` will ICE and `rustdoc --print=sysroot | false` will panic on a broken pipe.

This PR reverts 5a7058c (reverts PR rust-lang#131060) in favor of a future
fix to *unconditionally* apply `-Zon-broken-pipe=kill` to tool builds and also not drop the
`-Zon-broken-pipe=kill` flag for rustc binary builds.

I could not figure out how to write a regression test for the `rustc --print=sysroot | false`
behavior on Unix, so this is a plain revert for now.

This revert will unfortunately reintroduce rust-lang#130980 until we fix it again with the different approach.

See more details at <rust-lang#131059 (comment)> and in the timeline below.

### Timeline of kill-process-on-broken-pipe behavior changes

See [`unix_sigpipe` tracking issue rust-lang#97889][rust-lang#97889] for more context around unix sigpipe handling.

- From the very beginning since 2014, Rust binaries by default use `sig_ign`. This meant that if
  output pipe is broken yet the program tries to use `println!` and such, there will be a broken
  pipe panic from std. This lead to ICEs from e.g. `rustc --help | false` [rust-lang#34376].
- [rust-lang#49606] mitigated [rust-lang#34376] by adding an explicit signal handler to `rustc_driver` register a
  sigpipe handler with `SIG_DFL` which will cause the binary using `rustc_driver` to terminate if
  `rustc_driver::set_sigpipe_handler()` is called. `rustc`'s main binary wrapper uses
  `rustc_driver::set_sigpipe_handler()`, and so does `rustdoc`.
- A more universal way to set sigpipe behavior for Unix was introduced as part of [rust-lang#97889], i.e. `#
  [unix_sigpipe = "sig_dfl"]` attribute.
- [rust-lang#102587] migrated `rustc` to use `#[unix_sigpipe = "sig_dfl"]` instead of
  `rustc_driver::set_sigpipe_handler`.
- [rust-lang#103495] migrated `rustdoc` to use `#[unix_sigpipe = "sig_dfl"]` instead of
  `rustc_driver::set_sigpipe_handler`. `rustc_driver::set_sigpipe_handler` was removed.
- Following concerns about sigpipe setting UI in [rust-lang#97889], the UI for specifying sigpipe behavior
  was changed in [rust-lang#124480] from `#[unix_sigpipe = "sig_dfl"]` attribute to the commmand line flag
  `-Zon-broken-pipe=kill`.
    - In the same PR, `#[unix_sigpipe = "sig_dfl"]` were removed from `rustc` and `rustdoc` main
      binary crate entry points in favor of the command line flag. Kill-process-on-broken-pipe
      behavior was preserved by adding `-Zon-broken-pipe=kill` for `rustdoc` tool build step and
      `rustc` during compile steps.
- [rust-lang#126934] added `-Zon-broken-pipe=kill` for tool builds *except* for cargo to help with some miri
  tests because at the time the PR was written, this would lead to a couple of cargo test failures.
  Conditionally setting `RUSTFLAGS` can lead to tool build invalidation, e.g. building `cargo`
  without `-Zon-broken-pipe=kill` but `clippy` with the flag can lead to invalidation of the tool
  build cache. This is not a problem at the time, because nothing (not even miri) tests built stage
  1 cargo (all used initial cargo).
- In [rust-lang#130634] we found out that `run-make` tests like `compiler-builtins` needed stage 1 cargo, not
  just beta bootstrap cargo, because there can be changes that are present in stage 1 cargo but
  absent in beta cargo, which was blocking a beta backport.
- [rust-lang#130642] and later [rust-lang#130739] now build stage 1 cargo. And as previously mentioned, since
  `-Zon-broken-pipe=kill` was specifically *not* set for cargo, this caused tool build cache
  invalidation meaning rebuilds of stage 1 even if nothing in source was changed due to differing
  `RUSTFLAGS` since `run-make` also builds `rustdoc` and such [rust-lang#130980].

[rust-lang#34376]: rust-lang#34376
[rust-lang#49606]: rust-lang#49606
[rust-lang#97889]: rust-lang#97889
[rust-lang#102587]: rust-lang#102587
[rust-lang#103495]: rust-lang#103495
[rust-lang#124480]: rust-lang#124480
[rust-lang#130634]: rust-lang#130634
[rust-lang#130642]: rust-lang#130642
[rust-lang#130739]: rust-lang#130739
[rust-lang#130980]: rust-lang#130980
[rust-lang#131059]: rust-lang#131059
[^1]: rust-lang#131059 (comment)

r? ``@onur-ozkan`` (or bootstrap)
RalfJung pushed a commit to RalfJung/miri that referenced this issue Oct 3, 2024
Revert #131060 "Drop conditionally applied cargo `-Zon-broken-pipe=kill` flags"

In [#131059] we found out that `-Zon-broken-pipe=kill` is actually **load-bearing**[^1] for
(at least) `rustc` and `rustdoc` to have the kill-process-on-broken-pipe behavior, e.g. `rustc
--print=sysroot | false` will ICE and `rustdoc --print=sysroot | false` will panic on a broken pipe.

This PR reverts 5a7058c5a542ec42d1fa9b524f7b4f7d6845d1e9 (reverts PR #131060) in favor of a future
fix to *unconditionally* apply `-Zon-broken-pipe=kill` to tool builds and also not drop the
`-Zon-broken-pipe=kill` flag for rustc binary builds.

I could not figure out how to write a regression test for the `rustc --print=sysroot | false`
behavior on Unix, so this is a plain revert for now.

This revert will unfortunately reintroduce #130980 until we fix it again with the different approach.

See more details at <rust-lang/rust#131059 (comment)> and in the timeline below.

### Timeline of kill-process-on-broken-pipe behavior changes

See [`unix_sigpipe` tracking issue #97889][#97889] for more context around unix sigpipe handling.

- From the very beginning since 2014, Rust binaries by default use `sig_ign`. This meant that if
  output pipe is broken yet the program tries to use `println!` and such, there will be a broken
  pipe panic from std. This lead to ICEs from e.g. `rustc --help | false` [#34376].
- [#49606] mitigated [#34376] by adding an explicit signal handler to `rustc_driver` register a
  sigpipe handler with `SIG_DFL` which will cause the binary using `rustc_driver` to terminate if
  `rustc_driver::set_sigpipe_handler()` is called. `rustc`'s main binary wrapper uses
  `rustc_driver::set_sigpipe_handler()`, and so does `rustdoc`.
- A more universal way to set sigpipe behavior for Unix was introduced as part of [#97889], i.e. `#
  [unix_sigpipe = "sig_dfl"]` attribute.
- [#102587] migrated `rustc` to use `#[unix_sigpipe = "sig_dfl"]` instead of
  `rustc_driver::set_sigpipe_handler`.
- [#103495] migrated `rustdoc` to use `#[unix_sigpipe = "sig_dfl"]` instead of
  `rustc_driver::set_sigpipe_handler`. `rustc_driver::set_sigpipe_handler` was removed.
- Following concerns about sigpipe setting UI in [#97889], the UI for specifying sigpipe behavior
  was changed in [#124480] from `#[unix_sigpipe = "sig_dfl"]` attribute to the commmand line flag
  `-Zon-broken-pipe=kill`.
    - In the same PR, `#[unix_sigpipe = "sig_dfl"]` were removed from `rustc` and `rustdoc` main
      binary crate entry points in favor of the command line flag. Kill-process-on-broken-pipe
      behavior was preserved by adding `-Zon-broken-pipe=kill` for `rustdoc` tool build step and
      `rustc` during compile steps.
- [#126934] added `-Zon-broken-pipe=kill` for tool builds *except* for cargo to help with some miri
  tests because at the time the PR was written, this would lead to a couple of cargo test failures.
  Conditionally setting `RUSTFLAGS` can lead to tool build invalidation, e.g. building `cargo`
  without `-Zon-broken-pipe=kill` but `clippy` with the flag can lead to invalidation of the tool
  build cache. This is not a problem at the time, because nothing (not even miri) tests built stage
  1 cargo (all used initial cargo).
- In [#130634] we found out that `run-make` tests like `compiler-builtins` needed stage 1 cargo, not
  just beta bootstrap cargo, because there can be changes that are present in stage 1 cargo but
  absent in beta cargo, which was blocking a beta backport.
- [#130642] and later [#130739] now build stage 1 cargo. And as previously mentioned, since
  `-Zon-broken-pipe=kill` was specifically *not* set for cargo, this caused tool build cache
  invalidation meaning rebuilds of stage 1 even if nothing in source was changed due to differing
  `RUSTFLAGS` since `run-make` also builds `rustdoc` and such [#130980].

[#34376]: rust-lang/rust#34376
[#49606]: rust-lang/rust#49606
[#97889]: rust-lang/rust#97889
[#102587]: rust-lang/rust#102587
[#103495]: rust-lang/rust#103495
[#124480]: rust-lang/rust#124480
[#130634]: rust-lang/rust#130634
[#130642]: rust-lang/rust#130642
[#130739]: rust-lang/rust#130739
[#130980]: rust-lang/rust#130980
[#131059]: rust-lang/rust#131059
[^1]: rust-lang/rust#131059 (comment)

r? ``@onur-ozkan`` (or bootstrap)
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