Semi-frequent timeouts in test-unicode_all with 3.6.1 (aarch64)

[grahamc]

On a semi-regular basis, the test-unicode_all test times out in the NixOS build farm.

This is running NixOS on the host, with GCC 8.3.0.

Full build log available: https://hydra.nixos.org/build/103809502/nixlog/1

Log snippet:

88/88 Test #80: test-unicode_all ....................***Timeout 1500.01 sec
100000 of 8860608 UTF-8 strings checked
[...]
8200000 of 8860608 UTF-8 strings checked


99% tests passed, 1 tests failed out of 88

Label Time Summary:
all        = 1627.51 sec*proc (41 tests)
default    =  25.67 sec*proc (41 tests)

Total Test time (real) = 1548.32 sec

The following tests FAILED:
         80 - test-unicode_all (Timeout)

[t-b]

In travis we use a custom timeout, see

json/.travis.yml

Line 336 in f272ad5

- ctest -C Release --timeout 2700 -V -j

. Not sure if we can add that kind of setting into the test code itself which would be less error prone.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[grahamc]

This is not stale.

[nickaein]

The test-unicode_all is known to take a long time to run. Based on the logs, it was nearly finished when the timeout occurred (around 92%). Can the time limit be slightly increased to avoid such errors?

The long-term solution is probably breaking down such tests into smaller chunks.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[grahamc]

This is not stale.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[dota17]

The problem is still not fixed, i think.
Currently, the test-unicode_all is always not finished because times out.
This often happens in Xcode 9.2 C++ and before.