Revert to MSRV 1.52 for read-only

.github/workflows/rust.yml

@@ -75,9 +75,9 @@ jobs:
         with:
           submodules: true
       - name: Install rust
-        run: rustup update 1.60.0 && rustup default 1.60.0
+        run: rustup update 1.52.0 && rustup default 1.52.0
       - name: Test
-        run: cargo test --verbose --no-default-features --features read,std
+        run: cargo test --verbose --manifest-path crates/msrv-read/Cargo.toml --package object
 
   msrv-all:
     runs-on: ubuntu-latest

Cargo.toml

@@ -35,9 +35,9 @@ read_core = []
 # Read support for most file formats (including unaligned files).
 read = ["read_core", "archive", "coff", "elf", "macho", "pe", "xcoff", "unaligned"]
 # Core write support. You will need to enable some file formats too.
-write_core = ["crc32fast", "dep:indexmap", "dep:hashbrown"]
+write_core = ["crc32fast", "indexmap", "hashbrown"]
 # Core write support with libstd features. You will need to enable some file formats too.
-write_std = ["write_core", "std", "indexmap?/std", "crc32fast/std"]
+write_std = ["write_core", "std", "indexmap/std", "crc32fast/std"]
 # Write support for all file formats, including libstd features.
 write = ["write_std", "coff", "elf", "macho", "pe", "xcoff"]
 

README.md

@@ -39,7 +39,7 @@ See [`crates/examples`](crates/examples) for more examples.
 Changes to MSRV are considered breaking changes. We are conservative about changing the MSRV,
 but sometimes are required to due to dependencies. The MSRV is:
 
-  * 1.60.0 for the `read` feature and its dependencies.
+  * 1.52.0 for the `read` feature and its dependencies.
   * 1.64.0 for the `write` feature and its dependencies.
 
 ## License

clippy.toml

@@ -1 +1 @@
-msrv = "1.60.0"
+msrv = "1.52.0"

crates/msrv-read/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "msrv-read"
+version = "0.1.0"
+edition = "2018"
+publish = false
+
+[dependencies.object]
+path = "../.."
+default-features = false
+features = ["read", "std"] 
+
+# Do not act as part of the root workspace, so we can
+# resolve the dependency tree without hashbrown, which
+# requires 1.60 for its dep syntax and 1.64 to build.
+[workspace]

crates/msrv-read/src/main.rs

@@ -0,0 +1 @@
+fn main() {}