crater experiment: do not promote function calls in const/static items #148952

RalfJung · 2025-11-14T19:45:00Z

This repeats the experiment from #122819. Back then, not even cargo built; since then, time-rs/time#704 has landed so maybe we get a bit further this time.

See #124328 for context.

RalfJung · 2025-11-14T19:46:47Z

@bors try

crater experiment: do not promote function calls in const/static items

rust-log-analyzer · 2025-11-14T20:05:53Z

The job pr-check-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

    Checking indicatif v0.17.11
error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1794<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

note: erroneous constant encountered
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/css.rs:47:45
    |
  1 | / macro_rules! css_color_types {
  2 | |     ($(
  3 | |         $name:ident ($r:literal, $g:literal, $b:literal)
  4 | |     )*) => {
...   |
 47 | |                         CssColors::$name => CustomColor::<$r, $g, $b>::RAW_ANSI_FG,
    | |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...   |
 79 | |     };
 80 | | }
    | |_- in this expansion of `css_color_types!`
 81 |
 82 | / css_color_types! {
 83 | |     AliceBlue (240, 248, 255)
 84 | |     AntiqueWhite (250, 235, 215)
 85 | |     Aqua (0, 255, 255)
...   |
229 | |     YellowGreen (154, 205, 50)
230 | | }
    | |_- in this macro invocation

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1805<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1816<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1827<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1838<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1849<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1860<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1871<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1882<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1893<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1904<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1915<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1926<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1937<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1948<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1959<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1970<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1981<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a1992<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2003<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2014<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2025<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2036<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2047<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2058<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2069<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2080<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2091<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2102<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2113<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2124<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2135<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2146<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2157<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2168<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2179<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2190<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2201<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2212<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2223<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2234<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2245<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5
    |
330 |     const RAW_ANSI_FG: &'static str =
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
    = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 8, align: 4) {
                ╾a2256<imm> (4 ptr bytes)╼ 10 00 00 00                         │ ╾──╼....
            }

error[E0080]: constructing invalid value: encountered a dangling reference (use-after-free)
   --> /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/owo-colors-3.5.0/src/colors/custom.rs:330:5

RalfJung · 2025-11-14T20:15:58Z

Lol, this time we can't build clippy.^^ owo-colors fails.

This seems to have been fixed a year ago (owo-colors/owo-colors#131), but we depend on an ancient version of owo-colors via prettydiff. A newer prettydiff is available that would fix that, but the latest ui_test depends on an old prettydiff.

rust-bors · 2025-11-14T22:03:44Z

☀️ Try build successful (CI)
Build commit: 943e220 (943e2200e35c3825486c4671b6cab0107a07f8c1, parent: 42f4793e5a514858221b07ac379029d90353913e)

RalfJung · 2025-11-14T22:25:25Z

@craterbot check

craterbot · 2025-11-14T22:25:55Z

👌 Experiment pr-148952 created and queued.
🤖 Automatically detected try build 943e220
🔍 You can check out the queue and this experiment's details.

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

crater experiment: do not promote function calls in const/static items

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rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Nov 14, 2025

rust-bors bot added a commit that referenced this pull request Nov 14, 2025

Auto merge of #148952 - RalfJung:fn-call-promotion, r=<try>

943e220

crater experiment: do not promote function calls in const/static items

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RalfJung mentioned this pull request Nov 14, 2025

Bump some dependencies so owo-colors 3.x is gone oli-obk/ui_test#347

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craterbot added S-waiting-on-crater Status: Waiting on a crater run to be completed. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Nov 14, 2025

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