sccache does not work with docker build

[BenD0G]

Edit: this appears to be a symptom of #887 - changing the first line of the dockerfile to FROM rust:1.47 fixes the issue. Leaving open as I imagine the recent change to latest tag on rust images will catch others out too.

sccache does not appear to work at all in build instructions of dockerfiles - depending on what I try I get errors about sending data to the server, connecting to the server or timeouts waiting for the sccache server to start.

I could have sworn this used to work, but I've tried many variations, and building on both WSL (Docker version 19.03.12, build 48a66213fe) and on Docker Desktop for Windows (Docker version 19.03.13, build 4484c46d9d), all with the same output as below.

sccache --version: sccache 0.2.13

Any help would be greatly appreciated!

Sample Dockerfile and Output

Dockerfile:

FROM rust
RUN cargo install sccache
ENV RUSTC_WRAPPER=/usr/local/cargo/bin/sccache
RUN USER=root cargo init hello_world
WORKDIR /hello_world
RUN cargo build

Output:

<snip>
#8 [5/5] RUN cargo build
#8 0.365 error: failed to run `rustc` to learn about target-specific information
#8 0.365
#8 0.365 Caused by:
#8 0.365   process didn't exit successfully: `/usr/local/cargo/bin/sccache rustc - --crate-name ___ --print=file-names --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=cfg` (exit code: 2)
#8 0.365   --- stderr
#8 0.365   error: failed to execute compile
#8 0.365   caused by: Failed to send data to or receive data from server
#8 0.365   caused by: Failed to read response header
#8 0.365   caused by: failed to fill whole buffer
#8 ERROR: executor failed running [/bin/sh -c cargo build]: runc did not terminate sucessfully

[martin-foerster-rhebo]

We face exactly the same problem and in our case this was also a symptom of #887.

[glandium]

Duplicate of #875