const: Assertion `m_ctx.size() == 1U' failed.

[df1paw]

Grive -a fails with the following error:

andreas@notebook:~/src/grive2/build/grive$ ./grive -a

Please go to this URL and get an authentication code:

Link removed

Please input the authentication code here:
code removed
grive: /home/andreas/src/grive2/libgrive/src/json/ValBuilder.cc:133: gr::Val gr::ValBuilder::Result() const: Assertion `m_ctx.size() == 1U' failed.
Abgebrochen (Speicherabzug geschrieben)

[vitalif]

Does it reproduce every time?

[efuquen]

I can confirm this is repeatedly happening for me, can't use grive2. Initially thought it might be related to me having 2 factor authentication enabled, but I disabled it and still got the same error:

grive: /home/efuquen/Code/oss/grive2/libgrive/src/json/ValBuilder.cc:133: gr::Val gr::ValBuilder::Result() const: Assertion `m_ctx.size() == 1U' failed.
Aborted (core dumped)

[vitalif]

I've just reimplemented HTTP response logging in grive, so please check grive -a --log-http http with the latest master version. httpXXX.txt file will be created with the full communication transcript.
In fact it seems I've also reproduced your issue by repeating auth request many times, and now Google always says to me:
{ "error" : "invalid_grant", "error_description" : "Code was already redeemed." }
Don't yet know how to fix it though O_o it repeats every time for me now.
Also, the "assertion failed" tells us that ValBuilder fails to parse this JSON response. This is also a bug and I'll fix it shortly...

[vitalif]

Oh, that's not ValBuilder, it's just OAuth2 not handling error responses. Fixed in master, now it will print "Failed to obtain auth token".

[vitalif]

The problem was that google for some occasion was giving me the same oauth2 code every time. Of course it was "already redeemed". So I believe the bug is fixed, please reopen it if you still have the problem.