diff --git a/src/app.c b/src/app.c

index ba7d41d2..da6a343f 100644

--- a/src/app.c

+++ b/src/app.c

@@ -502,6 +502,8 @@ const iString *debugInfo_App(void) {

 iConstForEach(StringList, j, d->launchCommands) {

     appendFormat_String(msg, "%s\n", cstr_String(j.value));

 }

+ appendFormat_String(msg, "## MIME hooks\n");

+ append_String(msg, debugInfo_MimeHooks(d->mimehooks));

 return msg;

}



@@ -1034,7 +1036,13 @@ iBool willUseProxy_App(const iRangecc scheme) {



iBool handleCommand_App(const char *cmd) {

 iApp *d = &app_;

- if (equal_Command(cmd, "prefs.dialogtab")) {

+ if (equal_Command(cmd, "config.error")) {

+ makeMessage_Widget(uiTextCaution_ColorEscape "CONFIG ERROR",

+ format_CStr("Error in config file: %s\nSee "about:debug" for details.",

+ suffixPtr_Command(cmd, "where")));

+ return iTrue;

+ }

+ else if (equal_Command(cmd, "prefs.dialogtab")) {

     d->prefs.dialogTab = arg_Command(cmd);

     return iTrue;

 }

diff --git a/src/mimehooks.c b/src/mimehooks.c

index 8bb838ef..fd535643 100644

--- a/src/mimehooks.c

+++ b/src/mimehooks.c

@@ -1,6 +1,8 @@

#include "mimehooks.h"

+#include "app.h"



#include <the_Foundation/file.h>

+#include <the_Foundation/fileinfo.h>

#include <the_Foundation/path.h>

#include <the_Foundation/process.h>

#include <the_Foundation/stringlist.h>

@@ -23,6 +25,7 @@ void deinit_FilterHook(iFilterHook *d) {



void setMimePattern_FilterHook(iFilterHook *d, const iString *pattern) {

 iReleasePtr(&d->mimeRegex);

+ set_String(&d->mimePattern, pattern);

 d->mimeRegex = new_RegExp(cstr_String(pattern), caseInsensitive_RegExpOption);

}



@@ -105,6 +108,7 @@ iBlock *tryFilter_MimeHooks(const iMimeHooks *d, const iString *mime, const iBlo

static const char *mimeHooksFilename_MimeHooks_ = "mimehooks.txt";



void load_MimeHooks(iMimeHooks *d, const char *saveDir) {

+ iBool reportError = iFalse;

 iFile *f = newCStr_File(concatPath_CStr(saveDir, mimeHooksFilename_MimeHooks_));

 if (open_File(f, read_FileMode | text_FileMode)) {

     iBlock * src     = readAll_File(f);

@@ -124,6 +128,15 @@ void load_MimeHooks(iMimeHooks *d, const char *saveDir) {

             setRange_String(&hook->label, lines[0]);

             setMimePattern_FilterHook(hook, collect_String(newRange_String(lines[1])));

             setCommand_FilterHook(hook, collect_String(newRange_String(lines[2])));

+ /* Check if commmand is valid. */ {

+ iRangecc seg = iNullRange;

+ while (nextSplit_Rangecc(range_String(&hook->command), ";", &seg)) {

+ if (!fileExistsCStr_FileInfo(cstr_Rangecc(seg))) {

+ reportError = iTrue;

+ }

+ break;

+ }

+ }

             pushBack_PtrArray(&d->filters, hook);

             pos = 0;

         }

@@ -131,9 +144,37 @@ void load_MimeHooks(iMimeHooks *d, const char *saveDir) {

     delete_Block(src);

 }

 iRelease(f);

+ if (reportError) {

+ postCommand_App("~config.error where:mimehooks.txt");

+ }

}



void save_MimeHooks(const iMimeHooks *d) {

 iUnused(d);

}



+const iString *debugInfo_MimeHooks(const iMimeHooks *d) {

+ iString *str = collectNew_String();

+ size_t index = 0;

+ iConstForEach(PtrArray, i, &d->filters) {

+ const iFilterHook *filter = i.ptr;

+ appendFormat_String(str, "### %d: %s\n", index, cstr_String(&filter->label));

+ appendFormat_String(str, "MIME regex:\n\n%s\n\n", cstr_String(&filter->mimePattern));

+ iStringList *args = iClob(split_String(&filter->command, ";"));

+ if (isEmpty_StringList(args)) {

+ appendFormat_String(str, "\u26a0 Command not specified!\n");

+ continue;

+ }

+ const iString *exec = constAt_StringList(args, 0);

+ if (isEmpty_String(exec)) {

+ appendFormat_String(str, "\u26a0 Command not specified!\n");

+ }

+ else {

+ appendFormat_String(str, "Executable: %s\n\n%s\n\n",

+ fileExists_FileInfo(exec) ? "" : "\u26a0 FILE NOT FOUND",

+ cstr_String(exec));

+ }

+ index++;

+ }

+ return str;

+}

diff --git a/src/mimehooks.h b/src/mimehooks.h

index c78a3c86..7a8cd2c9 100644

--- a/src/mimehooks.h

+++ b/src/mimehooks.h

@@ -29,3 +29,5 @@ iBlock * tryFilter_MimeHooks (const iMimeHooks *, const iString *mime,



void load_MimeHooks (iMimeHooks *, const char *saveDir);

void save_MimeHooks (const iMimeHooks *);

+

+const iString *debugInfo_MimeHooks (const iMimeHooks *);