bwrap: Can\'t find source path /home/sccache/build/builds/[ID]/target: Permission denied

[cr]

After finding the fix for #531 the same system seems to be working on some compile jobs now, but among the trace there are other errors now. It looks like there's a permission issue around the target folder and (possibly as a result) bubblewrap trying to access non-existing MacOS user paths:

TRACE 2019-10-09T14:51:59Z: sccache_dist::build: compile_output: Output { status: ExitStatus(ExitStatus(256)), stdout: "", stderr: "bwrap: Can\'t find source path /home/sccache/build/builds/85832d30d43683eac2f22f69c3ca00c6a2d1b1c218fd396de414450e0
9ebf0ad582a7274b904641974294cc7f099241268a6cee1afa12ff2c470dbea5ed8ea0d-167/target: Permission denied\n" }
TRACE 2019-10-09T14:51:59Z: sccache_dist::build: retrieving ["/Users/tomtung/Work/mozilla-central/objdir/dom/base/Unified_cpp_dom_base2.o"]
DEBUG 2019-10-09T14:51:59Z: sccache_dist::build: Missing output path "/Users/tomtung/Work/mozilla-central/objdir/dom/base/Unified_cpp_dom_base2.o"
DEBUG 2019-10-09T14:51:59Z: sccache_dist::build: Finishing with overlay
TRACE 2019-10-09T14:51:59Z: sccache_dist::build: creating output directories
TRACE 2019-10-09T14:51:59Z: sccache_dist::build: performing compile
DEBUG 2019-10-09T14:51:59Z: sccache_dist::build: Returning result
TRACE 2019-10-09T14:51:59Z: sccache::dist::http::server: Res 336: Response { status_code: 200, headers: [("Content-Type", "application/octet-stream")] }

[cr]

I might have solved this problem by chmod go+rx /home/sccache, because that was still mode 0700. Would be strange though if a root process can't step into that user directory.

However, this error remains:

Output { status: ExitStatus(ExitStatus(256)), stdout: "", stderr: "bwrap: Can\'t chdir to /Users/tomtung/Work/mozilla-central/objdir/gfx/thebes: Permission denied\n" }

[Logarithmus]

@cr how did you solve it? I'm struggling with it too!