`swift repl` suppresses warnings

[MahdiBM]

Description

~ swift repl
Welcome to Apple Swift version 5.9.2 (swiftlang-5.9.2.2.56 clang-1500.1.0.2.5).
Type :help for assistance.
  1> #warning("test")
  2> let a = "sdad""
error: error while processing module import: error: repl.swift:5:15: error: unterminated string literal
let a = "sdad""
              ^

#warning at line #1 is suppressed but the error at line #2 is not.

Reproduction

[Provided in the previous section]

Expected behavior

I expect warnings to be emitted as well.

Environment

Swift 5.9.2, current 5.10 nightly, current main toolchain, none work as expected as of writing this issue.

Additional information

No response

[MahdiBM]

Use-case: checking to see if a nightly image actually solves a warning (like the Sendable warnings).
I just use swift -e for that right now.

[rjmansfield]

In swift repl mode, lldb will only output errors. One workaround is to use LLDB_SWIFT_DUMP_DIAGS=1 to see all diagnostics. e.g.

$ LLDB_SWIFT_DUMP_DIAGS=1 swift repl
Welcome to Apple Swift version 5.10 (swiftlang-5.10.0.6.3 clang-1500.3.3.3.999).
Type :help for assistance.
  1> #warning("warn")
repl.swift:1:10: warning: warn
#warning("warn")

[MahdiBM]

Perhaps that should change?