Bump MSRV to 1.88

d-e-s-o · d-e-s-o · commit cc9d63de6250 · 2026-02-18T14:23:54.000-08:00
Bump the minimum support Rust version to 1.88, in order to allow us to
bump the gimli dependency to 0.33. We require this version of gimli in
order to properly implement ELF &amp; DWARF relocation support.

Signed-off-by: Daniel Müller &lt;deso@posteo.net&gt;
diff --git a/.clippy.toml b/.clippy.toml
@@ -1,6 +1,6 @@
 # For general information about this file, check
 # https://doc.rust-lang.org/stable/clippy/configuration.html
 
-msrv = "1.75"
+msrv = "1.88"
 
 absolute-paths-allowed-crates = [ "gimli" ]
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -149,7 +149,7 @@ jobs:
         with:
           # Please adjust README, `rust-version` field in Cargo.toml,
           # and `msrv` in .clippy.toml when bumping version.
-          toolchain: 1.75.0
+          toolchain: 1.88.0
       - uses: Swatinem/rust-cache@v2
       - run: cargo build --features="apk,backtrace,bpf,demangle,dwarf,gsym,tracing"
       - run: cargo build --package=blazesym-c
diff --git a/.rustfmt.toml b/.rustfmt.toml
@@ -1,4 +1,5 @@
 blank_lines_upper_bound = 2
+edition = "2021"
 imports_granularity = "item"
 trailing_semicolon = false
 wrap_comments = true
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,3 +1,8 @@
+Unreleased
+----------
+- Bumped minimum supported Rust version to `1.88`
+
+
 0.2.3
 -----
 - Added support for `/usr/lib/debug/.build-id` debug link target
diff --git a/Cargo.toml b/Cargo.toml
@@ -13,7 +13,7 @@ default-members = ["."]
 
 [workspace.package]
 edition = "2021"
-rust-version = "1.75"
+rust-version = "1.88"
 license = "BSD-3-Clause"
 repository = "https://github.com/libbpf/blazesym"
 homepage = "https://github.com/libbpf/blazesym"
@@ -36,10 +36,11 @@ collapsible-if = "allow"
 fn-to-numeric-cast = "allow"
 let-and-return = "allow"
 let-unit-value = "allow"
+# TODO: Remove once we use Rust edition 2024.
+manual-c-str-literals = "allow"
 module-inception = "allow"
 type-complexity = "allow"
 absolute-paths = "warn"
-allow-attributes = "warn"
 clone-on-ref-ptr = "warn"
 dbg-macro = "warn"
 doc-markdown = "warn"
diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@
 [![coverage](https://codecov.io/gh/libbpf/blazesym/branch/main/graph/badge.svg)](https://codecov.io/gh/libbpf/blazesym)
 [![crates.io](https://img.shields.io/crates/v/blazesym.svg)](https://crates.io/crates/blazesym)
 [![Docs](https://docs.rs/blazesym/badge.svg)](https://docs.rs/blazesym)
-[![rustc](https://img.shields.io/badge/rustc-1.75+-blue.svg)](https://blog.rust-lang.org/2023/12/28/Rust-1.75.0/)
+[![rustc](https://img.shields.io/badge/rustc-1.88+-blue.svg)](https://blog.rust-lang.org/2025/06/26/Rust-1.88.0/)
 
 # blazesym
 
diff --git a/capi/CHANGELOG.md b/capi/CHANGELOG.md
@@ -1,3 +1,8 @@
+Unreleased
+----------
+- Bumped minimum supported Rust version to `1.88`
+
+
 0.1.7
 -----
 - Bumped maximum supported `blazesym` dependency to `0.2.3`
diff --git a/capi/README.md b/capi/README.md
@@ -1,6 +1,6 @@
 [![pipeline](https://github.com/libbpf/blazesym/actions/workflows/test.yml/badge.svg?branch=main)](https://github.com/libbpf/blazesym/actions/workflows/test.yml)
 [![crates.io](https://img.shields.io/crates/v/blazesym-c.svg)](https://crates.io/crates/blazesym-c)
-[![rustc](https://img.shields.io/badge/rustc-1.75+-blue.svg)](https://blog.rust-lang.org/2023/12/28/Rust-1.75.0/)
+[![rustc](https://img.shields.io/badge/rustc-1.88+-blue.svg)](https://blog.rust-lang.org/2025/06/26/Rust-1.88.0/)
 
 blazesym-c
 ==========
diff --git a/capi/src/inspect.rs b/capi/src/inspect.rs
@@ -69,7 +69,7 @@ impl Default for blaze_inspect_elf_src {
     }
 }
 
-#[cfg_attr(not(test), allow(unused))]
+#[cfg_attr(not(test), expect(unused))]
 impl blaze_inspect_elf_src {
     fn from(other: Elf) -> ManuallyDrop<Self> {
         let Elf {
diff --git a/cli/CHANGELOG.md b/cli/CHANGELOG.md
@@ -1,3 +1,8 @@
+Unreleased
+----------
+- Bumped minimum supported Rust version to `1.88`
+
+
 0.1.14
 ------
 - Bumped `blazesym` dependency to `0.2.3`
diff --git a/cli/README.md b/cli/README.md
@@ -1,6 +1,6 @@
 [![pipeline](https://github.com/libbpf/blazesym/actions/workflows/test.yml/badge.svg?branch=main)](https://github.com/libbpf/blazesym/actions/workflows/test.yml)
 [![crates.io](https://img.shields.io/crates/v/blazecli.svg)](https://crates.io/crates/blazecli)
-[![rustc](https://img.shields.io/badge/rustc-1.75+-blue.svg)](https://blog.rust-lang.org/2023/12/28/Rust-1.75.0/)
+[![rustc](https://img.shields.io/badge/rustc-1.88+-blue.svg)](https://blog.rust-lang.org/2025/06/26/Rust-1.88.0/)
 
 blazecli
 ========
diff --git a/dev/build.rs b/dev/build.rs
@@ -199,7 +199,7 @@ fn toolize_impl<'p, S, I>(
         &mut identity as &mut dyn FnMut(Command) -> Command
     };
 
-    #[allow(clippy::redundant_closure_for_method_calls)]
+    #[expect(clippy::redundant_closure_for_method_calls)]
     let () = run(
         tool,
         options
diff --git a/src/elf/mod.rs b/src/elf/mod.rs
@@ -1,7 +1,7 @@
 mod parser;
 #[cfg_attr(not(feature = "dwarf"), allow(unused_variables))]
 mod resolver;
-#[allow(dead_code, non_camel_case_types)]
+#[expect(dead_code, non_camel_case_types)]
 pub(crate) mod types;
 
 // Please adjust the documentation when adjusting directories.
diff --git a/src/elf/parser.rs b/src/elf/parser.rs
@@ -1264,7 +1264,6 @@ where
     }
 
     /// Perform an operation on each symbol.
-    #[allow(clippy::needless_borrows_for_generic_args)]
     pub(crate) fn for_each(&self, opts: &FindAddrOpts, f: &mut ForEachFn) -> Result<()> {
         let cache = self.cache.ensure_symtab_cache()?;
         let symtab = &cache.syms;
diff --git a/src/error.rs b/src/error.rs
@@ -28,7 +28,7 @@ mod private {
 
     impl Sealed for io::Error {}
     #[cfg(feature = "breakpad")]
-    #[allow(clippy::absolute_paths)]
+    #[expect(clippy::absolute_paths)]
     impl Sealed for (&[u8], nom::Err<nom::error::VerboseError<&[u8]>>) {}
     #[cfg(feature = "dwarf")]
     impl Sealed for gimli::Error {}
diff --git a/src/gsym/resolver.rs b/src/gsym/resolver.rs
@@ -34,7 +34,7 @@ use super::types::INFO_TYPE_INLINE_INFO;
 use super::types::INFO_TYPE_LINE_TABLE_INFO;
 
 
-#[allow(dead_code)]
+#[expect(dead_code)]
 enum Data<'dat> {
     Mmap(Mmap),
     Slice(&'dat [u8]),
diff --git a/src/lib.rs b/src/lib.rs
@@ -210,7 +210,7 @@ pub mod __private {
 
 #[cfg(feature = "tracing")]
 #[macro_use]
-#[allow(unused_imports)]
+#[expect(unused_imports)]
 mod log {
     pub(crate) use tracing::debug;
     pub(crate) use tracing::error;
diff --git a/src/maps.rs b/src/maps.rs
@@ -436,7 +436,7 @@ mod tests {
     }
 
     /// Check that we can parse `/proc/self/maps`.
-    #[allow(clippy::suspicious_map)]
+    #[expect(clippy::suspicious_map)]
     #[test]
     fn self_map_parsing() {
         let maps = parse(Pid::Slf).unwrap();
diff --git a/src/mmap.rs b/src/mmap.rs
@@ -88,7 +88,6 @@ pub struct Mmap {
     view: Range<u64>,
 }
 
-#[allow(rustdoc::private_intra_doc_links)]
 impl Mmap {
     /// Create a [`Builder`] for creating a customizable memory mapping.
     #[doc(hidden)]
diff --git a/src/normalize/ioctl.rs b/src/normalize/ioctl.rs
@@ -21,7 +21,7 @@ use crate::Result;
 // From uapi/linux/fs.h
 const PROCMAP_QUERY: usize = 0xC0686611; // _IOWR(PROCFS_IOCTL_MAGIC, 17, struct procmap_query)
 
-#[allow(non_camel_case_types)]
+#[expect(non_camel_case_types)]
 type procmap_query_flags = c_int;
 
 const PROCMAP_QUERY_VMA_READABLE: procmap_query_flags = 0x01;
@@ -32,7 +32,6 @@ const PROCMAP_QUERY_VMA_SHARED: procmap_query_flags = 0x08;
 const PROCMAP_QUERY_COVERING_OR_NEXT_VMA: procmap_query_flags = 0x10;
 
 
-#[allow(non_camel_case_types)]
 #[repr(C)]
 #[derive(Clone, Default)]
 struct procmap_query {
diff --git a/src/symbolize/symbolizer.rs b/src/symbolize/symbolizer.rs
@@ -1439,7 +1439,6 @@ impl Default for Symbolizer {
 
 
 #[cfg(test)]
-#[allow(clippy::missing_transmute_annotations)]
 mod tests {
     use super::*;
 
diff --git a/src/test_helper.rs b/src/test_helper.rs
@@ -31,7 +31,7 @@ use crate::SymType;
 ///
 /// This function returns the symbol information of the function along
 /// with it's absolute address in the memory mapped region.
-#[allow(clippy::missing_transmute_annotations)]
+#[expect(clippy::missing_transmute_annotations)]
 pub fn find_the_answer_fn(mmap: &Mmap) -> (inspect::SymInfo<'static>, Addr) {
     // Look up the address of the `the_answer` function inside of the shared
     // object.
diff --git a/src/util.rs b/src/util.rs
@@ -331,7 +331,7 @@ pub fn stat(path: &Path) -> io::Result<libc::stat> {
 
 #[cfg(linux)]
 #[cfg(test)]
-#[allow(clippy::absolute_paths)]
+#[expect(clippy::absolute_paths)]
 fn fstat(fd: std::os::unix::io::RawFd) -> io::Result<libc::stat> {
     let mut dst = MaybeUninit::uninit();
     let rc = unsafe { libc::fstat(fd, dst.as_mut_ptr()) };
@@ -373,7 +373,6 @@ where
     None
 }
 
-#[allow(dead_code)]
 pub(crate) fn find_lowest_match_by_key<T, B, F>(slice: &[T], b: &B, mut f: F) -> Option<usize>
 where
     F: FnMut(&T) -> B,

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`blank_lines_upper_bound = 2`
	`2`	`+edition = "2021"`
`2`	`3`	`imports_granularity = "item"`
`3`	`4`	`trailing_semicolon = false`
`4`	`5`	`wrap_comments = true`
Original file line number	Diff line number	Diff line change
`@@ -69,7 +69,7 @@ impl Default for blaze_inspect_elf_src {`
`69`	`69`	`}`
`70`	`70`	`}`
`71`	`71`
`72`		`-#[cfg_attr(not(test), allow(unused))]`
	`72`	`+#[cfg_attr(not(test), expect(unused))]`
`73`	`73`	`impl blaze_inspect_elf_src {`
`74`	`74`	`fn from(other: Elf) -> ManuallyDrop<Self> {`
`75`	`75`	`let Elf {`