improve int/float type resolution

compiler/checker/checker.odin

@@ -4205,7 +4205,11 @@ record_field_expr_candidate :: proc(
 	}
 	expr := checker.ast_module.exprs[expr_id]
 	constraint := checker.record_field_constraints[slot]
-	if !numeric_operand_is_open(checker, expr_id, locals, pkg, file) {
+	open := numeric_operand_is_open(checker, expr_id, locals, pkg, file)
+	if open && is_runtime_type(checker, checker.module.types.fields[slot].type) {
+		return false
+	}
+	if !open {
 		concrete := types.constraint_target(constraint, inferred, &checker.module.types)
 		if is_runtime_type(checker, concrete) {
 			return merge_record_field_demand(checker, slot, concrete, expr.span)
@@ -4224,7 +4228,7 @@ record_field_expr_candidate :: proc(
 	if is_float_constant_expr(checker, expr_id) {
 		return merge_record_field_default(checker, slot, types.F64, expr.span)
 	}
-	if numeric_operand_is_open(checker, expr_id, locals, pkg, file) {
+	if open {
 		candidate := inferred
 		if constraint == types.FLOAT && types.is_concrete_integer(candidate) {
 			candidate = types.F64

compiler_tests.odin

@@ -14865,7 +14865,19 @@ exercise func(cursor usize, narrow i8, wider i16, count i32) i32 {
 	return 0
 }
 
-main func() i32 { return exercise(7, 1, 1000, 3) }
+scan_open_cursor func() void {
+	cursor := 0
+	first Token := Token{start = cursor}
+	second Token := Token{start = cursor}
+	_ = first
+	_ = second
+}
+
+main func() i32 {
+	result := exercise(7, 1, 1000, 3)
+	scan_open_cursor()
+	return result
+}
 `
 	source_file := source.Source{path="record_constraints.bro", text=text}
 	diagnostics := source.init_diagnostics(&source_file)