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file-cache: use the right exception type for parse error #23

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merged 1 commit into from Jan 31, 2019

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samueldr
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@samueldr samueldr commented Jan 31, 2019

error: [json.exception.parse_error.101] parse error at 195: syntax error - invalid string: ill-formed UTF-8 byte; last read: '"bokml'; expected string literal

This is most probably caused by the upgrade in nixos-org-configurations/1b74e019b166d37a1510a99aeea86a0fa656854a
that, in turn, caused nlohmann_json to go from 2.1.0 -> 3.2.0

I haven't found concrete evidence in the changelog as to a change
changing the exception type. Though, the timing for failures matches
with this update.

Furthermore, once this fix is applied, launching the update locally
works fine.


This was tested by neutering the S3 stuff and running

$ nix-build && nix-shell -p ./result
$ mirror-nixos-branch nixos-18.09 https://hydra.nixos.org/job/nixos/release-18.09/tested/latest-finished

Do note that this doesn't seem affect the -small channels, while affecting the "big" channels.

```
error: [json.exception.parse_error.101] parse error at 195: syntax error - invalid string: ill-formed UTF-8 byte; last read: '"bokml'; expected string literal
```

This is most probably caused by the upgrade in nixos-org-configurations/1b74e019b166d37a1510a99aeea86a0fa656854a
that, in turn, caused nlohmann_json to go from 2.1.0 -> 3.2.0

I haven't found concrete evidence in the changelog as to a change
changing the exception type. Though, the timing for failures matches
with this update.

Furthermore, once this fix is applied, launching the update locally
works fine.
@matthewbauer
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/cc @edolstra

@grahamc
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grahamc commented Jan 31, 2019

https://github.com/nlohmann/json/releases/tag/v3.0.0 has a section called "Moving from 2.x.x to 3.0.0"

@grahamc grahamc merged commit d7a903d into NixOS:master Jan 31, 2019
@samueldr samueldr deleted the fix/json-error-handling branch August 15, 2019 04:32
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3 participants