crox --dir generates empty json array

[bugadani]

I might be doing something incorrectly, but maybe not. I've been following the original article over at brlo, which generated 371 mm_profiledata files (a total of around 4GB of data, including event args) into my profiles folder. However, running crox --dir profiles from the project root (i.e. pointing at the correct directory), the resulting chrome_profiler.json contains only [].

Converting a single profiledata file works as expected.

I'm using crox 9.1.0 with rustc -vV:

rustc 1.52.0-nightly (476acbf1e 2021-03-03)
binary: rustc
commit-hash: 476acbf1e9965b5e95c90f0d7d658709812b7003
commit-date: 2021-03-03
host: x86_64-unknown-linux-gnu
release: 1.52.0-nightly
LLVM version: 11.0.1