Setting an invalid proxy in GUI settings prevents program from starting #6749

Catch 22:

<arnep> hey guys i need some help, pls.
<arnep> trying to open bitcore, "error proxy adress 0.0.0.0 3888
<arnep> so i can't open the damn program
<buZz> oh you're using a proxy?
<buZz> maybe try disabling that
<arnep> can't get in the program, where i put it o

Bitcoin Core or bitcore?

Bitcoin Core.

Resolved this by making him remove the Bitcoin-Qt structure using regedit. Would be handy to have a command-line flag to reset the options at start.

Resolved this by making him remove the Bitcoin-Qt structure using regedit. Would be handy to have a command-line flag to reset the options at start.

Wouldn't -proxy=127.0.0.1:19999 overwrite the option at start?

Resolved this by making him remove the Bitcoin-Qt structure using regedit. Would be handy to have a command-line flag to reset the options at start.

Wouldn't -proxy=127.0.0.1:19999 overwrite the option at start?

Good point. It would not overwrite the setting (different layer), but temporarily allow to start bitcoin-qt and allow to change/reset the setting over the GUI.

Is there any priority when qt parses the args and config and overwrites the other?

E.g.

• -paytxfee is overwritten by qt
• -proxy overwrites qt

It uses SetSoftArg() = Set an argument if it doesn't already have a value for some shared parameters like -dbcache, -par, -spendzeroconfchange, -upnp, -listen, -proxy, -onion and -lang.

This means, the GUI settings can't override the command line startup or bitcoin.conf arguments.

Oh, it's updateGlobalFeeVariables() which does the overwrite. (Which it shouldn't do)

The priority for settings is supposed to be (from highest to lowest priority):

• Command line
• bitcoin.conf
• QSettings (in case of UI)
• Base defaults

For anyone who ends up here looking for the registry keys used by bitcoin-qt's settings, these are the following:

HKEY_CURRENT_USER\Software\Bitcoin\Bitcoin-Qt
HKEY_CURRENT_USER\Software\Bitcoin\Bitcoin-Qt-testnet