bugfix: endless loop in if stmt error recovery (#630)

kclvm/parser/src/parser/stmt.rs

@@ -137,6 +137,11 @@ impl<'a> Parser<'a> {
 
         self.bump_token(open_tok);
         loop {
+            if self.token.kind == TokenKind::Eof {
+                self.bump();
+                break;
+            }
+
             if self.token.kind == close_tok {
                 self.bump_token(close_tok);
                 break;

kclvm/parser/src/tests/error_recovery.rs

@@ -194,6 +194,7 @@ parse_module_snapshot! { if_stmt_recovery_3, r#"if True: a = 1 else b = 2"#}
 parse_module_snapshot! { if_stmt_recovery_4, r#"if True: else: b = 2"#}
 parse_module_snapshot! { if_stmt_recovery_5, r#"if"#}
 parse_module_snapshot! { if_stmt_recovery_6, r#"if else"#}
+parse_module_snapshot! { if_stmt_recovery_7, r#"if True:"#}
 parse_module_snapshot! { schema_stmt_recovery_0, r#"schema"#}
 parse_module_snapshot! { schema_stmt_recovery_1, r#"schema A"#}
 parse_module_snapshot! { schema_stmt_recovery_2, r#"schema A["#}

kclvm/parser/src/tests/snapshots/kclvm_parser__tests__error_recovery__if_stmt_recovery_7.snap

@@ -0,0 +1,39 @@
+---
+source: parser/src/tests/error_recovery.rs
+expression: "crate::tests::parsing_module_string(r#\"if True:\"#)"
+---
+Module {
+    filename: "",
+    pkg: "",
+    doc: "",
+    name: "",
+    body: [
+        Node {
+            node: If(
+                IfStmt {
+                    body: [],
+                    cond: Node {
+                        node: NameConstantLit(
+                            NameConstantLit {
+                                value: True,
+                            },
+                        ),
+                        filename: "",
+                        line: 1,
+                        column: 3,
+                        end_line: 1,
+                        end_column: 7,
+                    },
+                    orelse: [],
+                },
+            ),
+            filename: "",
+            line: 1,
+            column: 0,
+            end_line: 1,
+            end_column: 8,
+        },
+    ],
+    comments: [],
+}
+