…forms.

Line 0 has a special meaning in DWARF. From the version 5 spec:

    The compiler may emit the value 0 in cases
    where an instruction cannot be attributed to any
    source line.

DUMMY_SP spans cannot be attributed to any line. However, because rustc
internally stores line numbers starting at zero, lookup_debug_loc() adjusts
every line number by one. Special casing DUMMY_SP to actually emit line 0
ensures rustc communicates to the debugger that there's no meaningful source
code for this instruction, rather than telling the debugger to jump to line 1
randomly.

... by using `std::fs::remove_dir_all`, which handles a bunch of edge
cases including read-only files and symlinks which are extremely tricky
on Windows.

During config parsing, some bootstrap logic (e.g., `download-ci-llvm`) checks certain sources
and acts based on their state. This means that if path is a git submodule, bootstrap needs to
update it before checking its state. Otherwise it may make incorrect assumptions by relying on
outdated sources. To enable submodule updates during config parsing, we need to move the `update_submodule`
function from the `Build` to `Config` instance, so we can access to it during the parsing process.

Signed-off-by: onur-ozkan <[email protected]>

Signed-off-by: onur-ozkan <[email protected]>

Signed-off-by: onur-ozkan <[email protected]>

Signed-off-by: onur-ozkan <[email protected]>

fixes rust-lang#127576

This approach is, roughly, based on how Discourse does it.
It came up while discussing some other possible sidebar changes,
as a design that made rapid scanning easier while avoiding the
inherent trade-offs in summarizing.

…=Amanieu

fix: fs::remove_dir_all: treat internal ENOENT as success

fixes rust-lang#127576

try-job: test-various

Special case DUMMY_SP to emit line 0/column 0 locations on DWARF platforms.

Line 0 has a special meaning in DWARF. From the version 5 spec:

    The compiler may emit the value 0 in cases
    where an instruction cannot be attributed to any
    source line.

DUMMY_SP spans cannot be attributed to any line. However, because rustc internally stores line numbers starting at zero, lookup_debug_loc() adjusts every line number by one. Special casing DUMMY_SP to actually emit line 0 ensures rustc communicates to the debugger that there's no meaningful source code for this instruction, rather than telling the debugger to jump to line 1 randomly.

…links, r=Kobzol

bootstrap: fix clean's remove_dir_all implementation

It turns out bootstrap's `clean.rs`'s hand-rolled `rm_rf` (which probably comes before `std::fs::remove_dir_all` was stable) is very broken on native Windows around both read-only files/directories and especially symbolic links. So instead of rolling our own, just use `std::fs::remove_dir_all`.

This is a blocker for compiletest's own `rm_rf` implementation rust-lang#129155 which happens to be also buggy, which in turn is a blocker for the rmake.rs test port rust-lang#128562 that heavily exercises symlinks (I was reviewing rust-lang#128562 and testing it on native Windows which is how I found out).

I also left a FIXME for `detect_src_and_out` due to a failing assertion on native Windows (opened rust-lang#129188):

```
---- core::config::tests::detect_src_and_out stdout ----
thread 'core::config::tests::detect_src_and_out' panicked at src\core\config\tests.rs:72:13:
assertion `left == right` failed
  left: "E:\\tmp"
 right: "C:\\tmp"
```

Fixes rust-lang#112544 (because now we handle Windows symlinks properly).

try-job: x86_64-msvc
try-job: i686-mingw
try-job: test-various
try-job: armhf-gnu
try-job: aarch64-apple
try-job: aarch64-gnu

Added f16 and f128 to tests/ui/consts/const-float-bits-conv.rs

Fixes rust-lang#129163

try-job: x86_64-msvc
try-job: x86_64-mingw
try-job: i686-msvc
try-job: i686-mingw

…es, r=Mark-Simulacrum

improve submodule updates

During config parsing, some bootstrap logic (e.g., `download-ci-llvm`) checks certain sources (for `download-ci-llvm`, it's `src/llvm-project`) and acts based on their state. This means that if path is a git submodule, bootstrap needs to update it before checking its state. Otherwise it may make incorrect assumptions by relying on outdated sources. To enable submodule updates during config parsing, we need to move the `update_submodule` function from the `Build` to `Config`, so we can access to it during the parsing process.

Closes rust-lang#122787

…=light, r=GuillaumeGomez

rustdoc: animate the `:target` highlight

This approach is, roughly, based on how Discourse does it. It came up while discussing [some other possible sidebar changes](https://rust-lang.zulipchat.com/#narrow/stream/266220-t-rustdoc/topic/Moving.20deprecated.20items.20out.20of.20the.20way), as a design that made rapid scanning easier while avoiding the inherent trade-offs in summarizing.

https://github.com/user-attachments/assets/f7a8fec3-70a5-40a1-92ea-bfdffbd61c22