Tweak impossible pattern error messages

lib/binding_web/binding.js

@@ -667,8 +667,8 @@ class Language {
       const errorId = getValue(TRANSFER_BUFFER + SIZE_OF_INT, 'i32');
       const errorByte = getValue(TRANSFER_BUFFER, 'i32');
       const errorIndex = UTF8ToString(sourceAddress, errorByte).length;
-      const suffix = source.substr(errorIndex, 100);
-      const word = suffix.match(QUERY_WORD_REGEX)[0];
+      const suffix = source.substr(errorIndex, 100).split('\n')[0];
+      let word = suffix.match(QUERY_WORD_REGEX)[0];
       let error;
       switch (errorId) {
         case 2:
@@ -681,10 +681,12 @@ class Language {
           error = new RangeError(`Bad capture name @${word}`);
           break;
         case 5:
-          error = new SyntaxError(`Impossible pattern at offset ${errorIndex}: '${suffix}'...`);
+          error = new TypeError(`Bad pattern structure at offset ${errorIndex}: '${suffix}'...`);
+          word = "";
           break;
         default:
           error = new SyntaxError(`Bad syntax at offset ${errorIndex}: '${suffix}'...`);
+          word = "";
           break;
       }
       error.index = errorIndex;

lib/binding_web/exports.json

@@ -15,7 +15,6 @@
   "__ZNSt3__212basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEED2Ev",
   "__ZdlPv",
   "__Znwm",
-  "___assert_fail",
   "_abort",
   "_iswalnum",
   "_iswalpha",
@@ -73,8 +72,6 @@
   "_ts_query_capture_count",
   "_ts_query_capture_name_for_id",
   "_ts_query_captures_wasm",
-  "_ts_query_context_delete",
-  "_ts_query_context_new",
   "_ts_query_delete",
   "_ts_query_matches_wasm",
   "_ts_query_new",

lib/binding_web/test/query-test.js

@@ -30,6 +30,9 @@ describe("Query", () => {
       assert.throws(() => {
         JavaScript.query("(function_declaration non_existent:(identifier))");
       }, "Bad field name 'non_existent'");
+      assert.throws(() => {
+        JavaScript.query("(function_declaration name:(statement_block))");
+      }, "Bad pattern structure at offset 22: 'name:(statement_block))'");
     });
 
     it("throws an error on invalid predicates", () => {