Fix regex matches runtime error to throw INVALID_ARGUMENT as an error code

PiperOrigin-RevId: 586062469

Author: l46kok

runtime/src/main/java/dev/cel/runtime/BUILD.bazel

@@ -61,6 +61,7 @@ java_library(
         "@maven//:com_google_guava_guava",
         "@maven//:com_google_protobuf_protobuf_java",
         "@maven//:com_google_protobuf_protobuf_java_util",
+        "@maven//:com_google_re2j_re2j",
         "@maven//:org_jspecify_jspecify",
     ],
 )

runtime/src/main/java/dev/cel/runtime/StandardFunctions.java

@@ -24,6 +24,7 @@
 import com.google.protobuf.Timestamp;
 import com.google.protobuf.util.Durations;
 import com.google.protobuf.util.Timestamps;
+import com.google.re2j.PatternSyntaxException;
 import dev.cel.common.CelErrorCode;
 import dev.cel.common.CelOptions;
 import dev.cel.common.annotations.Internal;
@@ -62,13 +63,31 @@ public static void add(Registrar registrar, DynamicProto dynamicProto, CelOption
         "matches",
         String.class,
         String.class,
-        (String string, String regexp) -> RuntimeHelpers.matches(string, regexp, celOptions));
+        (String string, String regexp) -> {
+          try {
+            return RuntimeHelpers.matches(string, regexp, celOptions);
+          } catch (PatternSyntaxException e) {
+            throw new InterpreterException.Builder(e.getMessage())
+                .setCause(e)
+                .setErrorCode(CelErrorCode.INVALID_ARGUMENT)
+                .build();
+          }
+        });
     // Duplicate receiver-style matches overload.
     registrar.add(
         "matches_string",
         String.class,
         String.class,
-        (String string, String regexp) -> RuntimeHelpers.matches(string, regexp, celOptions));
+        (String string, String regexp) -> {
+          try {
+            return RuntimeHelpers.matches(string, regexp, celOptions);
+          } catch (PatternSyntaxException e) {
+            throw new InterpreterException.Builder(e.getMessage())
+                .setCause(e)
+                .setErrorCode(CelErrorCode.INVALID_ARGUMENT)
+                .build();
+          }
+        });
     // In operator: b in a
     registrar.add(
         "in_list",

runtime/src/test/resources/regexpMatches_error.baseline

@@ -0,0 +1,11 @@
+Source: matches("alpha", "**")
+=====>
+bindings: {}
+error:    evaluation error: error parsing regexp: missing argument to repetition operator: `*`
+error_code:    INVALID_ARGUMENT
+
+Source: "alpha".matches("**")
+=====>
+bindings: {}
+error:    evaluation error: error parsing regexp: missing argument to repetition operator: `*`
+error_code:    INVALID_ARGUMENT

runtime/src/test/resources/regexpMatchingTests.baseline

@@ -316,4 +316,4 @@ declare s {
 }
 =====>
 bindings: {s=alpha, regexp=.*ha.$}
-result:   true
+result:   true

testing/src/main/java/dev/cel/testing/BaseInterpreterTest.java

@@ -1475,6 +1475,15 @@ public void regexpMatchingTests() throws Exception {
     runTest(Activation.copyOf(ImmutableMap.of("s", "alpha", "regexp", ".*ha.$")));
   }
 
+  @Test
+  public void regexpMatches_error() throws Exception {
+    source = "matches(\"alpha\", \"**\")";
+    runTest(Activation.EMPTY);
+
+    source = "\"alpha\".matches(\"**\")";
+    runTest(Activation.EMPTY);
+  }
+
   @Test
   public void int64Conversions() throws Exception {
     source = "int('-1')"; // string converts to -1

validator/src/test/java/dev/cel/validator/validators/RegexLiteralValidatorTest.java

@@ -96,7 +96,8 @@ public void regex_globalWithVariable_noOp() throws Exception {
             () -> CEL.createProgram(ast).eval(ImmutableMap.of("str_var", "**")));
     assertThat(e)
         .hasMessageThat()
-        .contains("evaluation error: Function 'matches' failed with arg(s) 'test, **'");
+        .contains(
+            "evaluation error: error parsing regexp: missing argument to repetition operator: `*`");
   }
 
   @Test
@@ -116,7 +117,8 @@ public void regex_receiverWithVariable_noOp() throws Exception {
             () -> CEL.createProgram(ast).eval(ImmutableMap.of("str_var", "**")));
     assertThat(e)
         .hasMessageThat()
-        .contains("evaluation error: Function 'matches_string' failed with arg(s) 'test, **'");
+        .contains(
+            "evaluation error: error parsing regexp: missing argument to repetition operator: `*`");
   }
 
   @Test
@@ -141,7 +143,8 @@ public void regex_globalWithFunction_noOp() throws Exception {
     // However, the same AST fails on evaluation when the function dispatch fails.
     assertThat(e)
         .hasMessageThat()
-        .contains("evaluation error: Function 'matches' failed with arg(s) 'test, **'");
+        .contains(
+            "evaluation error: error parsing regexp: missing argument to repetition operator: `*`");
   }
 
   @Test
@@ -166,7 +169,8 @@ public void regex_receiverWithFunction_noOp() throws Exception {
     // However, the same AST fails on evaluation when the function dispatch fails.
     assertThat(e)
         .hasMessageThat()
-        .contains("evaluation error: Function 'matches_string' failed with arg(s) 'test, **'");
+        .contains(
+            "evaluation error: error parsing regexp: missing argument to repetition operator: `*`");
   }
 
   @Test