Who contributed to Elixir & Phoenix on May 16, 2026?

4 developers shipped this update, including jonatanklosko, dl-alexandre, evadne, and lukaszsamson.

What were the notable Elixir & Phoenix updates?

Respect --raise when mix test --warnings-as-errors passes with warnings, Redact repo config from SASL progress reports (#4718), and Scope ExUnit diff width tests.

Elixir & Phoenix

Elixir, Phoenix, LiveView, and Ecto - the BEAM web stack

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The Wire · Showcase

ELIXIR PATCHES TEST BEHAVIOR AND DATABASE SECRETS LEAKS

By RepoJournal · Filed 06:05 UTC on May 16, 2026 · About Elixir & Phoenix

4 people shipped this

evadne @evadne 2 cited

jonatanklosko @jonatanklosko 1 cited

dl-alexandre @dl-alexandre 1 cited

lukaszsamson @lukaszsamson 1 cited

Mix test now respects the --raise flag when warnings are treated as errors, closing a consistency gap in CI pipelines, while Ecto fixes a critical bug that exposed database credentials in SASL progress reports.

The Elixir team tightened `mix test --warnings-as-errors` behavior [1] so the --raise flag now triggers an exception when warnings occur, matching its existing behavior for test failures and pattern mismatches. This closes a gap where CI systems could miss warnings-as-errors without explicit exit codes. On the Ecto side, `Ecto.Repo.Supervisor` was dumping plaintext credentials into SASL progress reports when logger's handle_sasl_reports was enabled [2], a vulnerability that mirrors an earlier db_connection fix. The patch redacts sensitive config values from the child spec MFA before supervisor inspection. Elsewhere, ExUnit's diff formatter now uses infinity width by default [3] with explicit terminal-width overrides for layout tests, fixing a latent wrapping issue introduced in earlier changes. Documentation clarifications landed for `File.cp_r/3` [4] to explicitly note that directory permissions only copy when the `:preserve_directory_permissions` option is set, and `Mix.Task.requirements/1` got a spec fix [5] to correctly reflect its list-of-strings return type.

Action items

→ Upgrade Ecto immediately to patch database credential leaks in logs elixir-ecto/ecto [immediate]
→ Review CI configurations using mix test --warnings-as-errors for correct exit handling elixir-lang/elixir [plan]
→ Update code using File.cp_r to explicitly set preserve_directory_permissions if needed elixir-lang/elixir [monitor]

References

[1] Respect --raise when mix test --warnings-as-errors passes with warnings ↗ elixir-lang/elixir
[2] Redact repo config from SASL progress reports (#4718) ↗ elixir-ecto/ecto
[3] Scope ExUnit diff width tests ↗ elixir-lang/elixir
[4] Clarify File.cp_r directory permission docs ↗ elixir-lang/elixir
[5] Fix `Mix.Task.requirements/1` spec ↗ elixir-lang/elixir

Quick answers

What shipped in Elixir & Phoenix on May 16, 2026?: Mix test now respects the --raise flag when warnings are treated as errors, closing a consistency gap in CI pipelines, while Ecto fixes a critical bug that exposed database credentials in SASL progress reports. In total, 5 commits and 5 pull requests landed.
Who contributed to Elixir & Phoenix on May 16, 2026?: 4 developers shipped this update, including jonatanklosko, dl-alexandre, evadne, and lukaszsamson.
What were the notable Elixir & Phoenix updates?: Respect --raise when mix test --warnings-as-errors passes with warnings, Redact repo config from SASL progress reports (#4718), and Scope ExUnit diff width tests.

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