ARGF issue

luke-gruber · luke-gruber · commit dc94d3ca5443 · 2025-09-10T17:45:40.000-04:00
diff --git a/io.c b/io.c
@@ -10360,7 +10360,12 @@ static void
 argf_lineno_setter(VALUE val, ID id, VALUE *var)
 {
     VALUE argf = *var;
-    int n = NUM2INT(val);
+    int n;
+    RB_VM_UNLOCK();
+    {
+        n = NUM2INT(val); // can context switch
+    }
+    RB_VM_LOCK();
     ARGF.last_lineno = ARGF.lineno = n;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -10360,7 +10360,12 @@ static void`
`10360`	`10360`	`argf_lineno_setter(VALUE val, ID id, VALUE *var)`
`10361`	`10361`	`{`
`10362`	`10362`	`VALUE argf = *var;`
`10363`		`- int n = NUM2INT(val);`
	`10363`	`+ int n;`
	`10364`	`+ RB_VM_UNLOCK();`
	`10365`	`+ {`
	`10366`	`+ n = NUM2INT(val); // can context switch`
	`10367`	`+ }`
	`10368`	`+ RB_VM_LOCK();`
`10364`	`10369`	`ARGF.last_lineno = ARGF.lineno = n;`
`10365`	`10370`	`}`
`10366`	`10371`