Workaround for: https://bugzilla.mozilla.org/show_bug.cgi?id=1450912 GCC libstdc++ should be fixed to support locales on Solaris so that std::regex functionality works. --- thunderbird-132.0/comm/mail/app/nsMailApp.cpp.old 2024-10-30 14:20:58.360153467 -0400 +++ thunderbird-132.0/comm/mail/app/nsMailApp.cpp 2024-10-30 14:21:53.737436238 -0400 @@ -254,6 +254,10 @@ #endif int main(int argc, char* argv[], char* envp[]) { + +// Workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1450912 +setenv("LC_ALL", "C", 1); + #ifdef MOZ_BROWSER_CAN_BE_CONTENTPROC if (argc > 1 && IsArg(argv[1], "contentproc")) { // Set the process type and gecko child id.