Make syntaxError suppressable (fixes #5917 and #7076)

syntaxErrors were not suppressable, because they were treated as
InternalErrors which were thrown and catched during the checking,
and normal suppression rules were not applied for those.

We fix this by calling the normal reportErr() function that does
suppression matching.

lib/cppcheck.cpp

@@ -426,7 +426,7 @@ bool CppCheck::checkFile(const std::string &code, const char FileName[], std::se
                                                e.id,
                                                false);
 
-        _errorLogger.reportErr(errmsg);
+        reportErr(errmsg);
     }
     return true;
 }

test/testsuppressions.cpp

@@ -46,6 +46,8 @@ private:
         TEST_CASE(inlinesuppress_unusedFunction); // #4210 - unusedFunction
         TEST_CASE(globalsuppress_unusedFunction); // #4946
         TEST_CASE(suppressionWithRelativePaths); // #4733
+        TEST_CASE(suppressingSyntaxErrors); // #7076
+        TEST_CASE(suppressingSyntaxErrorsInline); // #5917
     }
 
     void suppressionsBadId1() const {
@@ -384,6 +386,30 @@ private:
         cppCheck.check("/somewhere/test.cpp", code);
         ASSERT_EQUALS("",errout.str());
     }
+
+    void suppressingSyntaxErrors() { // syntaxErrors should be suppressable (#7076)
+        std::map<std::string, std::string> files;
+        files["test.cpp"] = "if if\n";
+
+        checkSuppression(files, "syntaxError:test.cpp:1");
+        ASSERT_EQUALS("", errout.str());
+    }
+
+    void suppressingSyntaxErrorsInline() { // syntaxErrors should be suppressable (#5917)
+        std::map<std::string, std::string> files;
+        files["test.cpp"] = "double result(0.0);\n"
+                            "_asm\n"
+                            "{\n"
+                            "   // cppcheck-suppress syntaxError\n"
+                            "   push  EAX               ; save EAX for callers \n"
+                            "   mov   EAX,Real10        ; get the address pointed to by Real10\n"
+                            "   fld   TBYTE PTR [EAX]   ; load an extended real (10 bytes)\n"
+                            "   fstp  QWORD PTR result  ; store a double (8 bytes)\n"
+                            "   pop   EAX               ; restore EAX\n"
+                            "}";
+        checkSuppression(files, "");
+        ASSERT_EQUALS("", errout.str());
+    }
 };
 
 REGISTER_TEST(TestSuppressions)