[inspector] fixed crash on attempt to access empty scope_info on break

test/inspector/debugger/step-into-arrow-expected.txt

+Checks that stepInto nested arrow function doesn't produce crash.
+const mult = (x) => (y) =>
+  #y ? mult(x * y) : x;
+
+const mult = (x) => #(y) =>
+  y ? mult(x * y) : x;
+
+const mult = (x) => (y) =>
+  y ? mult(x * y) : x#;
+
+const mult = (x) => (y) =>
+  y ? mult(x * y) : x#;
+
+mult(5)(4)#()
+
+const mult = (x) => (y) =>
+  #y ? mult(x * y) : x;
+
+const mult = (x) => (y) =>
+  y ? mult(x * y) : x#;
+
+mult(5)(4)(#)
+