ruzstd: Make optional for now

Author: workingjubilee

.github/workflows/main.yml

@@ -92,7 +92,7 @@ jobs:
         if: contains(matrix.os, 'ubuntu')
         env:
           RUSTFLAGS: "-C link-arg=-Wl,--compress-debug-sections=zlib"
-      - run: cargo test
+      - run: cargo test --features "zstd"
         if: contains(matrix.os, 'ubuntu-24.04') ||
             (contains(matrix.os, 'ubuntu') && contains(matrix.rust, 'nightly'))
         env:

Cargo.toml

@@ -43,7 +43,7 @@ windows-targets = "0.52.6"
 
 [target.'cfg(not(all(windows, target_env = "msvc", not(target_vendor = "uwp"))))'.dependencies]
 miniz_oxide = { version = "0.8", default-features = false }
-ruzstd = { version = "0.7.2", default-features = false }
+ruzstd = { version = "0.7.2", default-features = false, optional = true }
 addr2line = { version = "0.24.0", default-features = false }
 libc = { version = "0.2.156", default-features = false }
 
@@ -65,6 +65,8 @@ std = []
 
 serialize-serde = ["serde"]
 
+zstd = ["dep:ruzstd"]
+
 #=======================================
 # Deprecated/internal features
 #

src/symbolize/gimli/elf.rs

@@ -9,9 +9,9 @@ use super::{gimli, Context, Endian, EndianSlice, Mapping, Stash, Vec};
 use alloc::sync::Arc;
 use core::convert::{TryFrom, TryInto};
 use core::str;
-use object::elf::{
-    ELFCOMPRESS_ZLIB, ELFCOMPRESS_ZSTD, ELF_NOTE_GNU, NT_GNU_BUILD_ID, SHF_COMPRESSED,
-};
+#[cfg(any(feature = "zstd", backtrace_ruzstd))]
+use object::elf::ELFCOMPRESS_ZSTD;
+use object::elf::{ELFCOMPRESS_ZLIB, ELF_NOTE_GNU, NT_GNU_BUILD_ID, SHF_COMPRESSED};
 use object::read::elf::{CompressionHeader, FileHeader, SectionHeader, SectionTable, Sym};
 use object::read::StringTable;
 use object::{BigEndian, Bytes, NativeEndian};
@@ -231,6 +231,7 @@ impl<'a> Object<'a> {
                     decompress_zlib(data.0, buf)?;
                     return Some(buf);
                 }
+                #[cfg(any(feature = "zstd", backtrace_ruzstd))]
                 ELFCOMPRESS_ZSTD => {
                     let size = usize::try_from(header.ch_size(self.endian)).ok()?;
                     let buf = stash.allocate(size);
@@ -357,6 +358,7 @@ fn decompress_zlib(input: &[u8], output: &mut [u8]) -> Option<()> {
     }
 }
 
+#[cfg(any(feature = "zstd", backtrace_ruzstd))]
 fn decompress_zstd(mut input: &[u8], mut output: &mut [u8]) -> Option<()> {
     use ruzstd::frame::ReadFrameHeaderError;
     use ruzstd::frame_decoder::FrameDecoderError;