diff -up highlight-3.42/src/core/platform_fs.cpp.list-available-langs highlight-3.42/src/core/platform_fs.cpp

--- highlight-3.42/src/core/platform_fs.cpp.list-available-langs	2019-01-11 11:42:30.948013206 +0100

+++ highlight-3.42/src/core/platform_fs.cpp	2019-01-11 11:44:25.206011626 +0100

@@ -222,8 +222,10 @@ void getFileNames ( const string &direct

     if ( errno ) return;

     // sort the current entries for fileName

-    if ( firstEntry < fileName.size() )

-        sort ( &fileName[firstEntry], &fileName[fileName.size() ] );

+    // https://gitlab.com/saalen/highlight/issues/84

+    // coredump with GLIBCXX_ASSERTIONS compiler option, use iterators if sort is needed

+    //if ( firstEntry < fileName.size() )

+    //    sort ( &fileName[firstEntry], &fileName[fileName.size() ] );

     // recurse into sub directories

     // if not doing recursive, subDirectory is empty