Fix the scan for module usings field: use 4 as the step instead of 3 (#281)

qinsoon · web-flow · commit f299191f3238 · 2025-11-06T16:01:58.000+13:00
Related: JuliaLang/julia#59859
diff --git a/mmtk/Cargo.toml b/mmtk/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mmtk-julia"
-version = "0.31.0"
+version = "0.31.1"
 authors = ["Eduardo Souza <ledusou@gmail.com>", "Yi Lin <qinsoon@gmail.com>"]
 build = "build.rs"
 edition = "2018"
diff --git a/mmtk/src/julia_scanning.rs b/mmtk/src/julia_scanning.rs
@@ -164,7 +164,7 @@ pub unsafe fn scan_julia_object<SV: SlotVisitor<JuliaVMSlot>>(obj: Address, clos
                         println!(" - scan usings: {:?}\n", objary_begin);
                     }
                     process_slot(closure, objary_begin);
-                    objary_begin = objary_begin.shift::<Address>(3);
+                    objary_begin = objary_begin.shift::<Address>(4);
                 }
             }
         } else if vtag_usize == ((jl_small_typeof_tags_jl_task_tag as usize) << 4) {
diff --git a/mmtk/src/julia_types.rs b/mmtk/src/julia_types.rs

Original file line number	Diff line number	Diff line change
`@@ -164,7 +164,7 @@ pub unsafe fn scan_julia_object<SV: SlotVisitor<JuliaVMSlot>>(obj: Address, clos`
`164`	`164`	`println!(" - scan usings: {:?}\n", objary_begin);`
`165`	`165`	`}`
`166`	`166`	`process_slot(closure, objary_begin);`
`167`		`- objary_begin = objary_begin.shift::<Address>(3);`
	`167`	`+ objary_begin = objary_begin.shift::<Address>(4);`
`168`	`168`	`}`
`169`	`169`	`}`
`170`	`170`	`} else if vtag_usize == ((jl_small_typeof_tags_jl_task_tag as usize) << 4) {`