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-rw-r--r--src/librustdoc/html/static/.eslintrc.js1
-rw-r--r--src/librustdoc/html/static/css/rustdoc.css5
-rw-r--r--src/librustdoc/html/static/css/themes/ayu.css1
-rw-r--r--src/librustdoc/html/static/css/themes/dark.css1
-rw-r--r--src/librustdoc/html/static/css/themes/light.css1
-rw-r--r--src/librustdoc/html/static/js/search.js130
-rw-r--r--src/tools/rustdoc-js/tester.js14
-rw-r--r--tests/rustdoc-gui/search-error.goml39
-rw-r--r--tests/rustdoc-js-std/parser-errors.js4
9 files changed, 153 insertions, 43 deletions
diff --git a/src/librustdoc/html/static/.eslintrc.js b/src/librustdoc/html/static/.eslintrc.js
index fcd925bb358..1a34530c2d1 100644
--- a/src/librustdoc/html/static/.eslintrc.js
+++ b/src/librustdoc/html/static/.eslintrc.js
@@ -90,7 +90,6 @@ module.exports = {
         "no-return-assign": "error",
         "no-script-url": "error",
         "no-sequences": "error",
-        "no-throw-literal": "error",
         "no-div-regex": "error",
     }
 };
diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index d18b56eb19c..95528e70e35 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -1260,6 +1260,11 @@ a.tooltip:hover::after {
 	color: var(--search-tab-title-count-color);
 }
 
+#search .error code {
+	border-radius: 3px;
+	background-color: var(--search-error-code-background-color);
+}
+
 #src-sidebar-toggle {
 	position: sticky;
 	top: 0;
diff --git a/src/librustdoc/html/static/css/themes/ayu.css b/src/librustdoc/html/static/css/themes/ayu.css
index 472a725f053..90cf689ad33 100644
--- a/src/librustdoc/html/static/css/themes/ayu.css
+++ b/src/librustdoc/html/static/css/themes/ayu.css
@@ -43,6 +43,7 @@ Original by Dempfi (https://github.com/dempfi/ayu)
 	--search-result-link-focus-background-color: #3c3c3c;
 	--search-result-border-color: #aaa3;
 	--search-color: #fff;
+	--search-error-code-background-color: #4f4c4c;
 	--search-results-alias-color: #c5c5c5;
 	--search-results-grey-color: #999;
 	--search-tab-title-count-color: #888;
diff --git a/src/librustdoc/html/static/css/themes/dark.css b/src/librustdoc/html/static/css/themes/dark.css
index 5612bde96a8..e8cd0693139 100644
--- a/src/librustdoc/html/static/css/themes/dark.css
+++ b/src/librustdoc/html/static/css/themes/dark.css
@@ -38,6 +38,7 @@
 	--search-result-link-focus-background-color: #616161;
 	--search-result-border-color: #aaa3;
 	--search-color: #111;
+	--search-error-code-background-color: #484848;
 	--search-results-alias-color: #fff;
 	--search-results-grey-color: #ccc;
 	--search-tab-title-count-color: #888;
diff --git a/src/librustdoc/html/static/css/themes/light.css b/src/librustdoc/html/static/css/themes/light.css
index 34b35c405a8..5e3f14e483f 100644
--- a/src/librustdoc/html/static/css/themes/light.css
+++ b/src/librustdoc/html/static/css/themes/light.css
@@ -38,6 +38,7 @@
 	--search-result-link-focus-background-color: #ccc;
 	--search-result-border-color: #aaa3;
 	--search-color: #000;
+	--search-error-code-background-color: #d0cccc;
 	--search-results-alias-color: #000;
 	--search-results-grey-color: #999;
 	--search-tab-title-count-color: #888;
diff --git a/src/librustdoc/html/static/js/search.js b/src/librustdoc/html/static/js/search.js
index 6501d32531f..5a46729156d 100644
--- a/src/librustdoc/html/static/js/search.js
+++ b/src/librustdoc/html/static/js/search.js
@@ -144,7 +144,7 @@ function initSearch(rawSearchIndex) {
     function itemTypeFromName(typename) {
         const index = itemTypes.findIndex(i => i === typename);
         if (index < 0) {
-            throw new Error("Unknown type filter `" + typename + "`");
+            throw ["Unknown type filter ", typename];
         }
         return index;
     }
@@ -164,21 +164,21 @@ function initSearch(rawSearchIndex) {
      */
     function getStringElem(query, parserState, isInGenerics) {
         if (isInGenerics) {
-            throw new Error("`\"` cannot be used in generics");
+            throw ["Unexpected ", "\"", " in generics"];
         } else if (query.literalSearch) {
-            throw new Error("Cannot have more than one literal search element");
+            throw ["Cannot have more than one literal search element"];
         } else if (parserState.totalElems - parserState.genericsElems > 0) {
-            throw new Error("Cannot use literal search when there is more than one element");
+            throw ["Cannot use literal search when there is more than one element"];
         }
         parserState.pos += 1;
         const start = parserState.pos;
         const end = getIdentEndPosition(parserState);
         if (parserState.pos >= parserState.length) {
-            throw new Error("Unclosed `\"`");
+            throw ["Unclosed ", "\""];
         } else if (parserState.userQuery[end] !== "\"") {
-            throw new Error(`Unexpected \`${parserState.userQuery[end]}\` in a string element`);
+            throw ["Unexpected ", parserState.userQuery[end], " in a string element"];
         } else if (start === end) {
-            throw new Error("Cannot have empty string element");
+            throw ["Cannot have empty string element"];
         }
         // To skip the quote at the end.
         parserState.pos += 1;
@@ -257,7 +257,7 @@ function initSearch(rawSearchIndex) {
             return;
         }
         if (query.literalSearch && parserState.totalElems - parserState.genericsElems > 0) {
-            throw new Error("You cannot have more than one element if you use quotes");
+            throw ["You cannot have more than one element if you use quotes"];
         }
         const pathSegments = name.split("::");
         if (pathSegments.length > 1) {
@@ -266,17 +266,17 @@ function initSearch(rawSearchIndex) {
 
                 if (pathSegment.length === 0) {
                     if (i === 0) {
-                        throw new Error("Paths cannot start with `::`");
+                        throw ["Paths cannot start with ", "::"];
                     } else if (i + 1 === len) {
-                        throw new Error("Paths cannot end with `::`");
+                        throw ["Paths cannot end with ", "::"];
                     }
-                    throw new Error("Unexpected `::::`");
+                    throw ["Unexpected ", "::::"];
                 }
             }
         }
         // In case we only have something like `<p>`, there is no name.
         if (pathSegments.length === 0 || (pathSegments.length === 1 && pathSegments[0] === "")) {
-            throw new Error("Found generics without a path");
+            throw ["Found generics without a path"];
         }
         parserState.totalElems += 1;
         if (isInGenerics) {
@@ -308,15 +308,15 @@ function initSearch(rawSearchIndex) {
             if (!isIdentCharacter(c)) {
                 if (c === "!") {
                     if (foundExclamation !== -1) {
-                        throw new Error("Cannot have more than one `!` in an ident");
+                        throw ["Cannot have more than one ", "!", " in an ident"];
                     } else if (parserState.pos + 1 < parserState.length &&
                         isIdentCharacter(parserState.userQuery[parserState.pos + 1])
                     ) {
-                        throw new Error("`!` can only be at the end of an ident");
+                        throw ["Unexpected ", "!", ": it can only be at the end of an ident"];
                     }
                     foundExclamation = parserState.pos;
                 } else if (isErrorCharacter(c)) {
-                    throw new Error(`Unexpected \`${c}\``);
+                    throw ["Unexpected ", c];
                 } else if (
                     isStopCharacter(c) ||
                     isSpecialStartCharacter(c) ||
@@ -329,7 +329,7 @@ function initSearch(rawSearchIndex) {
                     }
                     if (foundExclamation !== -1) {
                         if (start <= (end - 2)) {
-                            throw new Error("Cannot have associated items in macros");
+                            throw ["Cannot have associated items in macros"];
                         } else {
                             // if start == end - 1, we got the never type
                             // while the never type has no associated macros, we still
@@ -340,7 +340,7 @@ function initSearch(rawSearchIndex) {
                     // Skip current ":".
                     parserState.pos += 1;
                 } else {
-                    throw new Error(`Unexpected \`${c}\``);
+                    throw ["Unexpected ", c];
                 }
             }
             parserState.pos += 1;
@@ -351,8 +351,13 @@ function initSearch(rawSearchIndex) {
             if (parserState.typeFilter === null) {
                 parserState.typeFilter = "macro";
             } else if (parserState.typeFilter !== "macro") {
-                throw new Error("Invalid search type: macro `!` and " +
-                    `\`${parserState.typeFilter}\` both specified`);
+                throw [
+                    "Invalid search type: macro ",
+                    "!",
+                    " and ",
+                    parserState.typeFilter,
+                    " both specified",
+                ];
             }
             end = foundExclamation;
         }
@@ -382,9 +387,9 @@ function initSearch(rawSearchIndex) {
             parserState.userQuery[parserState.pos] === "<"
         ) {
             if (isInGenerics) {
-                throw new Error("Unexpected `<` after `<`");
+                throw ["Unexpected ", "<", " after ", "<"];
             } else if (start >= end) {
-                throw new Error("Found generics without a path");
+                throw ["Found generics without a path"];
             }
             parserState.pos += 1;
             getItemsBefore(query, parserState, generics, ">");
@@ -428,21 +433,39 @@ function initSearch(rawSearchIndex) {
                 foundStopChar = true;
                 continue;
             } else if (c === ":" && isPathStart(parserState)) {
-                throw new Error("Unexpected `::`: paths cannot start with `::`");
+                throw ["Unexpected ", "::", ": paths cannot start with ", "::"];
             } else if (c === ":" || isEndCharacter(c)) {
                 let extra = "";
                 if (endChar === ">") {
-                    extra = "`<`";
+                    extra = "<";
                 } else if (endChar === "") {
-                    extra = "`->`";
+                    extra = "->";
+                } else {
+                    extra = endChar;
                 }
-                throw new Error("Unexpected `" + c + "` after " + extra);
+                throw ["Unexpected ", c, " after ", extra];
             }
             if (!foundStopChar) {
                 if (endChar !== "") {
-                    throw new Error(`Expected \`,\`, \` \` or \`${endChar}\`, found \`${c}\``);
+                    throw [
+                        "Expected ",
+                        ",", // comma
+                        ", ",
+                        "&nbsp;", // whitespace
+                        " or ",
+                        endChar,
+                        ", found ",
+                        c,
+                    ];
                 }
-                throw new Error(`Expected \`,\` or \` \`, found \`${c}\``);
+                throw [
+                    "Expected ",
+                    ",", // comma
+                    " or ",
+                    "&nbsp;", // whitespace
+                    ", found ",
+                    c,
+                ];
             }
             const posBefore = parserState.pos;
             getNextElem(query, parserState, elems, endChar === ">");
@@ -470,7 +493,7 @@ function initSearch(rawSearchIndex) {
 
         for (let pos = 0; pos < parserState.pos; ++pos) {
             if (!isIdentCharacter(query[pos]) && !isWhitespaceCharacter(query[pos])) {
-                throw new Error(`Unexpected \`${query[pos]}\` in type filter`);
+                throw ["Unexpected ", query[pos], " in type filter"];
             }
         }
     }
@@ -496,19 +519,19 @@ function initSearch(rawSearchIndex) {
                     if (isReturnArrow(parserState)) {
                         break;
                     }
-                    throw new Error(`Unexpected \`${c}\` (did you mean \`->\`?)`);
+                    throw ["Unexpected ", c, " (did you mean ", "->", "?)"];
                 }
-                throw new Error(`Unexpected \`${c}\``);
+                throw ["Unexpected ", c];
             } else if (c === ":" && !isPathStart(parserState)) {
                 if (parserState.typeFilter !== null) {
-                    throw new Error("Unexpected `:`");
+                    throw ["Unexpected ", ":"];
                 }
                 if (query.elems.length === 0) {
-                    throw new Error("Expected type filter before `:`");
+                    throw ["Expected type filter before ", ":"];
                 } else if (query.elems.length !== 1 || parserState.totalElems !== 1) {
-                    throw new Error("Unexpected `:`");
+                    throw ["Unexpected ", ":"];
                 } else if (query.literalSearch) {
-                    throw new Error("You cannot use quotes on type filter");
+                    throw ["You cannot use quotes on type filter"];
                 }
                 checkExtraTypeFilterCharacters(parserState);
                 // The type filter doesn't count as an element since it's a modifier.
@@ -521,9 +544,29 @@ function initSearch(rawSearchIndex) {
             }
             if (!foundStopChar) {
                 if (parserState.typeFilter !== null) {
-                    throw new Error(`Expected \`,\`, \` \` or \`->\`, found \`${c}\``);
+                    throw [
+                        "Expected ",
+                        ",", // comma
+                        ", ",
+                        "&nbsp;", // whitespace
+                        " or ",
+                        "->", // arrow
+                        ", found ",
+                        c,
+                    ];
                 }
-                throw new Error(`Expected \`,\`, \` \`, \`:\` or \`->\`, found \`${c}\``);
+                throw [
+                    "Expected ",
+                    ",", // comma
+                    ", ",
+                    "&nbsp;", // whitespace
+                    ", ",
+                    ":", // colon
+                    " or ",
+                    "->", // arrow
+                    ", found ",
+                    c,
+                ];
             }
             const before = query.elems.length;
             getNextElem(query, parserState, query.elems, false);
@@ -540,7 +583,7 @@ function initSearch(rawSearchIndex) {
                 getItemsBefore(query, parserState, query.returned, "");
                 // Nothing can come afterward!
                 if (query.returned.length === 0) {
-                    throw new Error("Expected at least one item after `->`");
+                    throw ["Expected at least one item after ", "->"];
                 }
                 break;
             } else {
@@ -694,7 +737,7 @@ function initSearch(rawSearchIndex) {
             }
         } catch (err) {
             query = newParsedQuery(userQuery);
-            query.error = err.message;
+            query.error = err;
             query.typeFilter = -1;
             return query;
         }
@@ -1760,7 +1803,16 @@ function initSearch(rawSearchIndex) {
 
         let output = `<h1 class="search-results-title">Results${crates}</h1>`;
         if (results.query.error !== null) {
-            output += `<h3>Query parser error: "${results.query.error}".</h3>`;
+            const error = results.query.error;
+            error.forEach((value, index) => {
+                value = value.split("<").join("&lt;").split(">").join("&gt;");
+                if (index % 2 !== 0) {
+                    error[index] = `<code>${value}</code>`;
+                } else {
+                    error[index] = value;
+                }
+            });
+            output += `<h3 class="error">Query parser error: "${error.join("")}".</h3>`;
             output += "<div id=\"search-tabs\">" +
                 makeTabHeader(0, "In Names", ret_others[1]) +
                 "</div>";
diff --git a/src/tools/rustdoc-js/tester.js b/src/tools/rustdoc-js/tester.js
index 3da4fed33e1..ea5780f66d7 100644
--- a/src/tools/rustdoc-js/tester.js
+++ b/src/tools/rustdoc-js/tester.js
@@ -138,8 +138,20 @@ function valueCheck(fullPath, expected, result, error_text, queryName) {
                 error_text.push('==> Unknown key "' + key + '"');
                 break;
             }
+            let result_v = result[key];
+            if (result_v !== null && key === "error") {
+                result_v.forEach((value, index) => {
+                    value = value.split("&nbsp;").join(" ");
+                    if (index % 2 === 1) {
+                        result_v[index] = "`" + value + "`";
+                    } else {
+                        result_v[index] = value;
+                    }
+                });
+                result_v = result_v.join("");
+            }
             const obj_path = fullPath + (fullPath.length > 0 ? '.' : '') + key;
-            valueCheck(obj_path, expected[key], result[key], error_text, queryName);
+            valueCheck(obj_path, expected[key], result_v, error_text, queryName);
         }
     } else {
         expectedValue = JSON.stringify(expected);
diff --git a/tests/rustdoc-gui/search-error.goml b/tests/rustdoc-gui/search-error.goml
new file mode 100644
index 00000000000..2a10a647b53
--- /dev/null
+++ b/tests/rustdoc-gui/search-error.goml
@@ -0,0 +1,39 @@
+// Checks that the crate search filtering is handled correctly and changes the results.
+goto: "file://" + |DOC_PATH| + "/test_docs/index.html?search=sa'%3Bda'%3Bds"
+show-text: true
+
+define-function: (
+    "check-colors",
+    (theme, error_background),
+    block {
+        // Setting the theme.
+        local-storage: {"rustdoc-theme": |theme|, "rustdoc-use-system-theme": "false"}
+        // We reload the page so the local storage settings are being used.
+        reload:
+
+        wait-for: "#search .error code"
+        assert-css: ("#search .error code", {"background-color": |error_background|})
+    }
+)
+
+call-function: (
+    "check-colors",
+    {
+        "theme": "ayu",
+        "error_background": "rgb(79, 76, 76)",
+    },
+)
+call-function: (
+    "check-colors",
+    {
+        "theme": "dark",
+        "error_background": "rgb(72, 72, 72)",
+    },
+)
+call-function: (
+    "check-colors",
+    {
+        "theme": "light",
+        "error_background": "rgb(208, 204, 204)",
+    },
+)
diff --git a/tests/rustdoc-js-std/parser-errors.js b/tests/rustdoc-js-std/parser-errors.js
index f82a2472063..6c5a7770283 100644
--- a/tests/rustdoc-js-std/parser-errors.js
+++ b/tests/rustdoc-js-std/parser-errors.js
@@ -67,7 +67,7 @@ const PARSED = [
         returned: [],
         typeFilter: -1,
         userQuery: "a<\"p\">",
-        error: "`\"` cannot be used in generics",
+        error: "Unexpected `\"` in generics",
     },
     {
         elems: [],
@@ -373,7 +373,7 @@ const PARSED = [
         returned: [],
         typeFilter: -1,
         userQuery: "a!a",
-        error: '`!` can only be at the end of an ident',
+        error: 'Unexpected `!`: it can only be at the end of an ident',
     },
     {
         elems: [],