Introduce mismatch (#62)

Cargo.lock

@@ -57,7 +57,7 @@ dependencies = [
 
 [[package]]
 name = "aquamarine"
-version = "0.3.0"
+version = "0.4.1"
 dependencies = [
  "fluence",
  "log",
@@ -1693,7 +1693,7 @@ dependencies = [
 
 [[package]]
 name = "stepper-lib"
-version = "0.4.0"
+version = "0.4.1"
 dependencies = [
  "air-parser",
  "aqua-test-utils",

crates/air-parser/src/parser/air.lalrpop

@@ -31,7 +31,15 @@ Instr: Box<Instruction<'input>> = {
 
     "(" xor <l:Instr> <r:Instr> ")" => Box::new(Instruction::Xor(Xor(l, r))),
 
-    "(" match_ <l:Matchable> <r:Matchable> <i:Instr> ")" => Box::new(Instruction::Match(Match(l, r, i))),
+    "(" match_ <l:Matchable> <r:Matchable> <i:Instr> ")" => {
+        let match_ = Match { left_value: l, right_value: r, instruction: i};
+        Box::new(Instruction::Match(match_))
+    },
+
+    "(" mismatch <l:Matchable> <r:Matchable> <i:Instr> ")" => {
+        let mismatch = MisMatch { left_value: l, right_value: r, instruction: i};
+        Box::new(Instruction::MisMatch(mismatch))
+     },
 
     ! => { errors.push(<>); Box::new(Instruction::Error) },
 }
@@ -112,5 +120,6 @@ extern {
         xor => Token::Xor,
         next => Token::Next,
         match_ => Token::Match,
+        mismatch => Token::MisMatch,
     }
 }

crates/air-parser/src/parser/ast.rs

@@ -28,6 +28,7 @@ pub enum Instruction<'i> {
     Par(Par<'i>),
     Xor(Xor<'i>),
     Match(Match<'i>),
+    MisMatch(MisMatch<'i>),
     Fold(Fold<'i>),
     Next(Next<'i>),
     Error,
@@ -91,11 +92,18 @@ pub struct Par<'i>(pub Box<Instruction<'i>>, pub Box<Instruction<'i>>);
 pub struct Xor<'i>(pub Box<Instruction<'i>>, pub Box<Instruction<'i>>);
 
 #[derive(Serialize, Debug, PartialEq, Eq)]
-pub struct Match<'i>(
-    pub MatchableValue<'i>,
-    pub MatchableValue<'i>,
-    pub Box<Instruction<'i>>,
-);
+pub struct Match<'i> {
+    pub left_value: MatchableValue<'i>,
+    pub right_value: MatchableValue<'i>,
+    pub instruction: Box<Instruction<'i>>,
+}
+
+#[derive(Serialize, Debug, PartialEq, Eq)]
+pub struct MisMatch<'i> {
+    pub left_value: MatchableValue<'i>,
+    pub right_value: MatchableValue<'i>,
+    pub instruction: Box<Instruction<'i>>,
+}
 
 #[derive(Serialize, Debug, PartialEq, Eq)]
 pub struct Fold<'i> {

crates/air-parser/src/parser/lexer/air_lexer.rs

@@ -181,6 +181,7 @@ fn string_to_token(input: &str, start_pos: usize) -> Result<Token, LexerError> {
         XOR_INSTR => Ok(Token::Xor),
         NEXT_INSTR => Ok(Token::Next),
         MATCH_INSTR => Ok(Token::Match),
+        MISMATCH_INSTR => Ok(Token::MisMatch),
 
         INIT_PEER_ID => Ok(Token::InitPeerId),
 
@@ -236,6 +237,7 @@ const FOLD_INSTR: &str = "fold";
 const XOR_INSTR: &str = "xor";
 const NEXT_INSTR: &str = "next";
 const MATCH_INSTR: &str = "match";
+const MISMATCH_INSTR: &str = "mismatch";
 
 const INIT_PEER_ID: &str = "%init_peer_id%";
 

crates/air-parser/src/parser/lexer/tests.rs

@@ -103,6 +103,32 @@ fn air_instructions() {
             Ok((5, Token::CloseRoundBracket, 6))
         ]
     );
+
+    let match_tokens = run_lexer("match");
+    assert_eq!(match_tokens, vec![Ok((0, Token::Match, 5))]);
+
+    let match_tokens = run_lexer("(match)");
+    assert_eq!(
+        match_tokens,
+        vec![
+            Ok((0, Token::OpenRoundBracket, 1)),
+            Ok((1, Token::Match, 6)),
+            Ok((6, Token::CloseRoundBracket, 7))
+        ]
+    );
+
+    let mismatch_tokens = run_lexer("mismatch");
+    assert_eq!(mismatch_tokens, vec![Ok((0, Token::MisMatch, 8))]);
+
+    let mismatch_tokens = run_lexer("(mismatch)");
+    assert_eq!(
+        mismatch_tokens,
+        vec![
+            Ok((0, Token::OpenRoundBracket, 1)),
+            Ok((1, Token::MisMatch, 9)),
+            Ok((9, Token::CloseRoundBracket, 10))
+        ]
+    );
 }
 
 #[test]

crates/air-parser/src/parser/lexer/token.rs

@@ -36,4 +36,5 @@ pub enum Token<'input> {
     Xor,
     Next,
     Match,
+    MisMatch,
 }

crates/air-parser/src/parser/tests.rs

@@ -244,6 +244,34 @@ fn parse_fold() {
     assert_eq!(instruction, expected);
 }
 
+#[test]
+fn parse_match() {
+    use ast::MatchableValue::Variable;
+
+    let source_code = r#"
+        (match v1 v2
+            (null)
+        )
+        "#;
+    let instruction = parse(&source_code.as_ref());
+    let expected = match_(Variable("v1"), Variable("v2"), null());
+    assert_eq!(instruction, expected);
+}
+
+#[test]
+fn parse_mismatch() {
+    use ast::MatchableValue::Variable;
+
+    let source_code = r#"
+        (mismatch v1 v2
+            (null)
+        )
+        "#;
+    let instruction = parse(&source_code.as_ref());
+    let expected = mismatch(Variable("v1"), Variable("v2"), null());
+    assert_eq!(instruction, expected);
+}
+
 fn source_fold_with(name: &str) -> String {
     f!(r#"(fold iterable i
             ({name} (null) (null))
@@ -516,18 +544,23 @@ fn comments() {
 fn seq<'a>(l: Instruction<'a>, r: Instruction<'a>) -> Instruction<'a> {
     Instruction::Seq(ast::Seq(Box::new(l), Box::new(r)))
 }
+
 fn par<'a>(l: Instruction<'a>, r: Instruction<'a>) -> Instruction<'a> {
     Instruction::Par(ast::Par(Box::new(l), Box::new(r)))
 }
+
 fn xor<'a>(l: Instruction<'a>, r: Instruction<'a>) -> Instruction<'a> {
     Instruction::Xor(ast::Xor(Box::new(l), Box::new(r)))
 }
+
 fn seqnn() -> Instruction<'static> {
     seq(null(), null())
 }
+
 fn null() -> Instruction<'static> {
     Instruction::Null(ast::Null)
 }
+
 fn fold<'a>(
     iterable: ast::IterableValue<'a>,
     iterator: &'a str,
@@ -539,6 +572,31 @@ fn fold<'a>(
         instruction: std::rc::Rc::new(instruction),
     })
 }
+
+fn match_<'a>(
+    left_value: ast::MatchableValue<'a>,
+    right_value: ast::MatchableValue<'a>,
+    instruction: Instruction<'a>,
+) -> Instruction<'a> {
+    Instruction::Match(ast::Match {
+        left_value,
+        right_value,
+        instruction: Box::new(instruction),
+    })
+}
+
+fn mismatch<'a>(
+    left_value: ast::MatchableValue<'a>,
+    right_value: ast::MatchableValue<'a>,
+    instruction: Instruction<'a>,
+) -> Instruction<'a> {
+    Instruction::MisMatch(ast::MisMatch {
+        left_value,
+        right_value,
+        instruction: Box::new(instruction),
+    })
+}
+
 fn binary_instruction<'a, 'b>(
     name: &'a str,
 ) -> impl Fn(Instruction<'b>, Instruction<'b>) -> Instruction<'b> {

stepper-lib/src/execution/air/compare_matchable/compare_matchable.rs

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2020 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use crate::contexts::execution::ExecutionCtx;
+use crate::execution::air::ExecutionResult;
+use crate::execution::utils::resolve_to_jvaluable;
+use crate::JValue;
+
+use air_parser::ast::MatchableValue;
+
+pub(crate) fn are_matchable_eq<'ctx>(
+    left: &MatchableValue<'_>,
+    right: &MatchableValue<'_>,
+    exec_ctx: &'ctx ExecutionCtx<'_>,
+) -> ExecutionResult<bool> {
+    use MatchableValue::*;
+
+    match (left, right) {
+        (Literal(name), matchable) => compare_matchable_and_literal(matchable, name, exec_ctx),
+        (matchable, Literal(name)) => compare_matchable_and_literal(matchable, name, exec_ctx),
+        (Variable(left_name), Variable(right_name)) => {
+            let left_jvaluable = resolve_to_jvaluable(left_name, exec_ctx)?;
+            let left_value = left_jvaluable.as_jvalue();
+
+            let right_jvaluable = resolve_to_jvaluable(right_name, exec_ctx)?;
+            let right_value = right_jvaluable.as_jvalue();
+
+            Ok(left_value == right_value)
+        }
+        (JsonPath { variable: lv, path: lp }, JsonPath { variable: rv, path: rp }) => {
+            let left_jvaluable = resolve_to_jvaluable(lv, exec_ctx)?;
+            let left_value = left_jvaluable.apply_json_path(lp)?;
+
+            let right_jvaluable = resolve_to_jvaluable(rv, exec_ctx)?;
+            let right_value = right_jvaluable.apply_json_path(rp)?;
+
+            Ok(left_value == right_value)
+        }
+        _ => Ok(false),
+    }
+}
+
+fn compare_matchable_and_literal<'ctx>(
+    matchable: &MatchableValue<'_>,
+    string_literal: &str,
+    exec_ctx: &'ctx ExecutionCtx<'_>,
+) -> ExecutionResult<bool> {
+    use std::borrow::Cow;
+    use MatchableValue::*;
+
+    fn compare_jvalue_and_literal(jvalue: Cow<'_, JValue>, string_literal: &str) -> bool {
+        use std::ops::Deref;
+
+        match jvalue.deref() {
+            JValue::String(value) => value == string_literal,
+            _ => false,
+        }
+    }
+
+    match matchable {
+        Literal(name) => Ok(name == &string_literal),
+        Variable(name) => {
+            let jvaluable = resolve_to_jvaluable(name, exec_ctx)?;
+            let jvalue = jvaluable.as_jvalue();
+            Ok(compare_jvalue_and_literal(jvalue, string_literal))
+        }
+        JsonPath { variable, path } => {
+            let jvaluable = resolve_to_jvaluable(variable, exec_ctx)?;
+            let jvalues = jvaluable.apply_json_path(path)?;
+            if jvalues.len() != 1 {
+                return Ok(false);
+            }
+
+            Ok(compare_jvalue_and_literal(Cow::Borrowed(jvalues[0]), string_literal))
+        }
+    }
+}

stepper-lib/src/execution/air/compare_matchable/mod.rs

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2020 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+mod compare_matchable;
+
+pub(super) use compare_matchable::are_matchable_eq;

stepper-lib/src/execution/air/match_.rs

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+use super::compare_matchable::are_matchable_eq;
 use super::ExecutionCtx;
 use super::ExecutionError;
 use super::ExecutionResult;
@@ -21,92 +22,18 @@ use super::ExecutionTraceCtx;
 use crate::log_instruction;
 
 use air_parser::ast::Match;
-use air_parser::ast::MatchableValue;
 
 impl<'i> super::ExecutableInstruction<'i> for Match<'i> {
     fn execute(&self, exec_ctx: &mut ExecutionCtx<'i>, trace_ctx: &mut ExecutionTraceCtx) -> ExecutionResult<()> {
         log_instruction!(match_, exec_ctx, trace_ctx);
 
-        let left_value = &self.0;
-        let right_value = &self.1;
-        let is_equal_values = compare_matchable(left_value, right_value, exec_ctx)?;
+        let are_values_equal = are_matchable_eq(&self.left_value, &self.right_value, exec_ctx)?;
 
-        if !is_equal_values {
+        if !are_values_equal {
             return Err(ExecutionError::MatchWithoutXorError);
         }
 
-        self.2.execute(exec_ctx, trace_ctx)
-    }
-}
-
-use crate::execution::utils::resolve_to_jvaluable;
-use crate::JValue;
-
-fn compare_matchable<'ctx>(
-    left: &MatchableValue<'_>,
-    right: &MatchableValue<'_>,
-    exec_ctx: &'ctx ExecutionCtx<'_>,
-) -> ExecutionResult<bool> {
-    use MatchableValue::*;
-
-    match (left, right) {
-        (Literal(name), matchable) => compare_matchable_and_literal(matchable, name, exec_ctx),
-        (matchable, Literal(name)) => compare_matchable_and_literal(matchable, name, exec_ctx),
-        (Variable(left_name), Variable(right_name)) => {
-            let left_jvaluable = resolve_to_jvaluable(left_name, exec_ctx)?;
-            let left_value = left_jvaluable.as_jvalue();
-
-            let right_jvaluable = resolve_to_jvaluable(right_name, exec_ctx)?;
-            let right_value = right_jvaluable.as_jvalue();
-
-            Ok(left_value == right_value)
-        }
-        (JsonPath { variable: lv, path: lp }, JsonPath { variable: rv, path: rp }) => {
-            let left_jvaluable = resolve_to_jvaluable(lv, exec_ctx)?;
-            let left_value = left_jvaluable.apply_json_path(lp)?;
-
-            let right_jvaluable = resolve_to_jvaluable(rv, exec_ctx)?;
-            let right_value = right_jvaluable.apply_json_path(rp)?;
-
-            Ok(left_value == right_value)
-        }
-        _ => Ok(false),
-    }
-}
-
-fn compare_matchable_and_literal<'ctx>(
-    matchable: &MatchableValue<'_>,
-    string_literal: &str,
-    exec_ctx: &'ctx ExecutionCtx<'_>,
-) -> ExecutionResult<bool> {
-    use std::borrow::Cow;
-    use MatchableValue::*;
-
-    fn compare_jvalue_and_literal(jvalue: Cow<'_, JValue>, string_literal: &str) -> bool {
-        use std::ops::Deref;
-
-        match jvalue.deref() {
-            JValue::String(value) => value == string_literal,
-            _ => false,
-        }
-    }
-
-    match matchable {
-        Literal(name) => Ok(name == &string_literal),
-        Variable(name) => {
-            let jvaluable = resolve_to_jvaluable(name, exec_ctx)?;
-            let jvalue = jvaluable.as_jvalue();
-            Ok(compare_jvalue_and_literal(jvalue, string_literal))
-        }
-        JsonPath { variable, path } => {
-            let jvaluable = resolve_to_jvaluable(variable, exec_ctx)?;
-            let jvalues = jvaluable.apply_json_path(path)?;
-            if jvalues.len() != 1 {
-                return Ok(false);
-            }
-
-            Ok(compare_jvalue_and_literal(Cow::Borrowed(jvalues[0]), string_literal))
-        }
+        self.instruction.execute(exec_ctx, trace_ctx)
     }
 }
 

stepper-lib/src/execution/air/mismatch.rs

@@ -0,0 +1,193 @@
+/*
+ * Copyright 2020 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use super::compare_matchable::are_matchable_eq;
+use super::ExecutionCtx;
+use super::ExecutionError;
+use super::ExecutionResult;
+use super::ExecutionTraceCtx;
+use crate::log_instruction;
+
+use air_parser::ast::MisMatch;
+
+impl<'i> super::ExecutableInstruction<'i> for MisMatch<'i> {
+    fn execute(&self, exec_ctx: &mut ExecutionCtx<'i>, trace_ctx: &mut ExecutionTraceCtx) -> ExecutionResult<()> {
+        log_instruction!(match_, exec_ctx, trace_ctx);
+
+        let are_values_equal = are_matchable_eq(&self.left_value, &self.right_value, exec_ctx)?;
+
+        if are_values_equal {
+            return Err(ExecutionError::MatchWithoutXorError);
+        }
+
+        self.instruction.execute(exec_ctx, trace_ctx)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::contexts::execution_trace::ExecutionTrace;
+    use crate::JValue;
+
+    use aqua_test_utils::call_vm;
+    use aqua_test_utils::create_aqua_vm;
+    use aqua_test_utils::echo_string_call_service;
+
+    use std::rc::Rc;
+
+    #[test]
+    fn mismatch_equal() {
+        use crate::contexts::execution_trace::CallResult::*;
+        use crate::contexts::execution_trace::ExecutedState::*;
+
+        let set_variable_peer_id = "set_variable_peer_id";
+        let mut set_variable_vm = create_aqua_vm(echo_string_call_service(), set_variable_peer_id);
+
+        let local_peer_id = "local_peer_id";
+        let mut vm = create_aqua_vm(echo_string_call_service(), local_peer_id);
+
+        let script = format!(
+            r#"
+            (seq
+                (seq
+                    (call "{0}" ("" "") ["value_1"] value_1)
+                    (call "{0}" ("" "") ["value_1"] value_2)
+                )
+                (xor
+                    (mismatch value_1 value_2
+                        (call "{1}" ("service_id_2" "local_fn_name") ["result_1"] result_1)
+                    )
+                    (call "{1}" ("service_id_2" "local_fn_name") ["result_2"] result_2)
+                )
+            )"#,
+            set_variable_peer_id, local_peer_id
+        );
+
+        let res = call_vm!(set_variable_vm, "asd", script.clone(), "", "");
+        let res = call_vm!(vm, "asd", script, "", res.data);
+
+        let actual_trace: ExecutionTrace = serde_json::from_slice(&res.data).expect("should be valid json");
+        let expected_executed_call_result = Call(Executed(Rc::new(JValue::String(String::from("result_2")))));
+
+        assert_eq!(actual_trace.len(), 3);
+        assert_eq!(actual_trace[2], expected_executed_call_result);
+    }
+
+    #[test]
+    fn mismatch_not_equal() {
+        use crate::contexts::execution_trace::CallResult::*;
+        use crate::contexts::execution_trace::ExecutedState::*;
+
+        let set_variable_peer_id = "set_variable_peer_id";
+        let mut set_variable_vm = create_aqua_vm(echo_string_call_service(), set_variable_peer_id);
+
+        let local_peer_id = "local_peer_id";
+        let mut vm = create_aqua_vm(echo_string_call_service(), local_peer_id);
+
+        let script = format!(
+            r#"
+            (seq
+                (seq
+                    (call "{0}" ("" "") ["value_1"] value_1)
+                    (call "{0}" ("" "") ["value_2"] value_2)
+                )
+                (xor
+                    (mismatch value_1 value_2
+                        (call "{1}" ("service_id_2" "local_fn_name") ["result_1"] result_1)
+                    )
+                    (call "{1}" ("service_id_2" "local_fn_name") ["result_2"] result_2)
+                )
+            )"#,
+            set_variable_peer_id, local_peer_id
+        );
+
+        let res = call_vm!(set_variable_vm, "asd", script.clone(), "", "");
+        let res = call_vm!(vm, "asd", script, "", res.data);
+
+        let actual_trace: ExecutionTrace = serde_json::from_slice(&res.data).expect("should be valid json");
+        let expected_executed_call_result = Call(Executed(Rc::new(JValue::String(String::from("result_1")))));
+
+        assert_eq!(actual_trace.len(), 3);
+        assert_eq!(actual_trace[2], expected_executed_call_result);
+    }
+
+    #[test]
+    fn mismatch_with_string() {
+        use crate::contexts::execution_trace::CallResult::*;
+        use crate::contexts::execution_trace::ExecutedState::*;
+
+        let set_variable_peer_id = "set_variable_peer_id";
+        let mut set_variable_vm = create_aqua_vm(echo_string_call_service(), set_variable_peer_id);
+
+        let local_peer_id = "local_peer_id";
+        let mut vm = create_aqua_vm(echo_string_call_service(), local_peer_id);
+
+        let script = format!(
+            r#"
+            (seq
+                (call "{0}" ("" "") ["value_1"] value_1)
+                (xor
+                    (mismatch value_1 "value_1"
+                        (call "{1}" ("service_id_2" "local_fn_name") ["result_1"] result_1)
+                    )
+                    (call "{1}" ("service_id_2" "local_fn_name") ["result_2"] result_2)
+                )
+            )"#,
+            set_variable_peer_id, local_peer_id
+        );
+
+        let res = call_vm!(set_variable_vm, "asd", script.clone(), "", "");
+        let res = call_vm!(vm, "asd", script, "", res.data);
+
+        let actual_trace: ExecutionTrace = serde_json::from_slice(&res.data).expect("should be valid json");
+        let expected_executed_call_result = Call(Executed(Rc::new(JValue::String(String::from("result_2")))));
+
+        assert_eq!(actual_trace.len(), 2);
+        assert_eq!(actual_trace[1], expected_executed_call_result);
+    }
+
+    #[test]
+    fn mismatch_without_xor() {
+        let set_variable_peer_id = "set_variable_peer_id";
+        let mut set_variable_vm = create_aqua_vm(echo_string_call_service(), set_variable_peer_id);
+
+        let local_peer_id = "local_peer_id";
+        let mut vm = create_aqua_vm(echo_string_call_service(), local_peer_id);
+
+        let script = format!(
+            r#"
+            (seq
+                (seq
+                    (call "{0}" ("" "") ["value_1"] value_1)
+                    (call "{0}" ("" "") ["value_1"] value_2)
+                )
+                (mismatch value_1 value_2
+                    (call "{1}" ("service_id_2" "local_fn_name") ["result_1"] result_1)
+                )
+            )"#,
+            set_variable_peer_id, local_peer_id
+        );
+
+        let res = call_vm!(set_variable_vm, "asd", script.clone(), "", "");
+        let res = call_vm!(vm, "asd", script.clone(), "", res.data);
+
+        assert_eq!(res.ret_code, 1015);
+
+        let res = call_vm!(vm, "asd", script, "", res.data);
+
+        assert_eq!(res.ret_code, 1015);
+    }
+}

stepper-lib/src/execution/air/mod.rs

@@ -15,8 +15,10 @@
  */
 
 mod call;
+mod compare_matchable;
 mod fold;
 mod match_;
+mod mismatch;
 mod null;
 mod par;
 mod seq;
@@ -46,6 +48,7 @@ impl<'i> ExecutableInstruction<'i> for Instruction<'i> {
             Instruction::Seq(seq) => seq.execute(exec_ctx, trace_ctx),
             Instruction::Xor(xor) => xor.execute(exec_ctx, trace_ctx),
             Instruction::Match(match_) => match_.execute(exec_ctx, trace_ctx),
+            Instruction::MisMatch(mismatch) => mismatch.execute(exec_ctx, trace_ctx),
             Instruction::Error => unreachable!("should not execute if parsing succeeded. QED."),
         }
     }