Failed to parse manifest / feature 'resolver' is required

[slowriot]

From a fresh clone on a new Debian Bullseye host:

The mentioned manifest is as follows:

# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.

[package]
edition = "2018"
name = "object"
version = "0.30.3"
exclude = [
    "/.github",
    "/testfiles",
]
description = "A unified interface for reading and writing object file formats."
readme = "README.md"
keywords = [
    "object",
    "elf",
    "mach-o",
    "pe",
    "coff",
]
license = "Apache-2.0 OR MIT"
repository = "https://github.com/gimli-rs/object"
resolver = "2"

[package.metadata.docs.rs]
features = ["doc"]

[dependencies.alloc]
version = "1.0.0"
optional = true
package = "rustc-std-workspace-alloc"

[dependencies.compiler_builtins]
version = "0.1.2"
optional = true

[dependencies.core]
version = "1.0.0"
optional = true
package = "rustc-std-workspace-core"

[dependencies.crc32fast]
version = "1.2"
optional = true
default-features = false

[dependencies.flate2]
version = "1"
optional = true

[dependencies.hashbrown]
version = "0.13.1"
features = ["ahash"]
optional = true
default-features = false

[dependencies.indexmap]
version = "1.6"
optional = true

[dependencies.memchr]
version = "2.4.1"
default-features = false

[dependencies.wasmparser]
version = "0.57"
optional = true

[features]
all = [
    "read",
    "write",
    "std",
    "compression",
    "wasm",
]
archive = []
cargo-all = []
coff = []
compression = [
    "flate2",
    "std",
]
default = [
    "read",
    "compression",
]
doc = [
    "read_core",
    "write_std",
    "std",
    "compression",
    "archive",
    "coff",
    "elf",
    "macho",
    "pe",
    "wasm",
]
elf = []
macho = []
pe = ["coff"]
read = [
    "read_core",
    "archive",
    "coff",
    "elf",
    "macho",
    "pe",
    "unaligned",
]
read_core = []
rustc-dep-of-std = [
    "core",
    "compiler_builtins",
    "alloc",
    "memchr/rustc-dep-of-std",
]
std = ["memchr/std"]
unaligned = []
unstable = []
unstable-all = [
    "all",
    "unstable",
    "xcoff",
]
wasm = ["wasmparser"]
write = [
    "write_std",
    "coff",
    "elf",
    "macho",
    "pe",
]
write_core = [
    "crc32fast",
    "indexmap",
    "hashbrown",
]
write_std = [
    "write_core",
    "std",
    "indexmap/std",
    "crc32fast/std",
]
xcoff = []

[ReliefCrew]

Are you using the Bullseye package for rustc? If so, it may be too old.

Have you tried using rustup instead?