pipe error messages to stderr

[returntocorp]

pipe error messages to stderr

[aryx]

I can't reproduce either, or maybe I misunderstood.
But for me the error does go on stderr.

$ yy -lang c -e 'XXXXX' -r2c .

• /home/pad/github/sgrep/_build/default/bin/main_sgrep.exe -lang c -e XXXXX -r2c .
  (ONCE) skipping: #if PY_MAJOR_VERSION < 3

(ONCE) skipping: #ifdef _MSC_VER
PB: Ast_c_build, on /tmp/pyyaml/ext/_yaml.h (exn = (Failure "/tmp/pyyaml/ext/_yaml.h:23:0: no ifdef"))
{ "results": [] }
pad@yrax:/tmp/pyyaml$ yy -lang c -e 'XXXXX' -r2c . > /tmp/res

• /home/pad/github/sgrep/_build/default/bin/main_sgrep.exe -lang c -e XXXXX -r2c .
  (ONCE) skipping: #if PY_MAJOR_VERSION < 3

(ONCE) skipping: #ifdef _MSC_VER
PB: Ast_c_build, on /tmp/pyyaml/ext/_yaml.h (exn = (Failure "/tmp/pyyaml/ext/_yaml.h:23:0: no ifdef"))
pad@yrax:/tmp/pyyaml$ cat /tmp/res
{ "results": [] }