ERROR: compilation failed for package 'b64' version 0.1.6

vkatti · July 11, 2025, 3:19pm

Hi team.
Following is the output when I try to deploy my shinyApp to ShinyApps.io. I've deployed this app multiple times and faced no issues ever. Today is the first time I am facing deployment issues. This is critical as this is client-facing app.

── Preparing for deployment ────────────────────────────────────────────────────
✔ Re-deploying "TRCStoreApp" using "server: shinyapps.io / username: zukti"
ℹ Looking up application with id "14342304"...
✔ Found application <https://zukti.shinyapps.io/TRCStoreApp/>
ℹ Bundling 31 files: '.Renviron', '__TODO__.txt', '_auth0.yml', 'app.R', 'config.yml', 'R/functions.R', 'R/rbac_functions.R', 'R/rbac_permissions.R', 'www/custom_styles.css', 'www/print_gt_table.js', 'www/TRC LOGO.jpg', 'modules/000_home_module.R', 'modules/100_inwards_module.R', 'modules/101_inwards_new_row_module.R', 'modules/200_indents_module.R', 'modules/201_indents_new_row_module.R', 'modules/300_production_module.R', 'modules/400_wastage_module.R', …, 'modules/907_wastage_costing_report.R', and 'modules/999_user_module.R'
ℹ Capturing R dependencies
✔ Found 121 dependencies
✔ Created 235,483b bundle
ℹ Uploading bundle...
✔ Uploaded bundle with id 10600914
── Deploying to server ─────────────────────────────────────────────────────────
Waiting for task: 1567165377
  building: Parsing manifest
  building: Building image: 13035767
  building: Installing system dependencies
  building: Building package: b64
## Begin Task Log ##############################################################
Quarto not found.
[2025-07-11T15:00:18.411451565+0000] Execute script: packages/build/V8.sh
W: http://cran.rstudio.com/bin/linux/ubuntu/jammy-cran40/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
Reading package lists...
Building dependency tree...
Reading state information...
The following additional packages will be installed:
  libc-ares2 libnode72 libuv1-dev
The following NEW packages will be installed:
  libc-ares2 libnode-dev libnode72 libuv1-dev
0 upgraded, 4 newly installed, 0 to remove and 227 not upgraded.
Need to get 11.6 MB of archives.
After this operation, 48.1 MB of additional disk space will be used.
Get:1 http://us-east-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/main amd64 libuv1-dev amd64 1.43.0-1ubuntu0.1 [130 kB]
Get:2 http://us-east-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/main amd64 libc-ares2 amd64 1.18.1-1ubuntu0.22.04.3 [45.1 kB]
Get:3 http://us-east-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/universe amd64 libnode72 amd64 12.22.9~dfsg-1ubuntu3.6 [10.8 MB]
Get:4 http://us-east-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/universe amd64 libnode-dev amd64 12.22.9~dfsg-1ubuntu3.6 [609 kB]
debconf: delaying package configuration, since apt-utils is not installed
Fetched 11.6 MB in 0s (75.6 MB/s)
Selecting previously unselected package libuv1-dev:amd64.	
(Reading database ... 	(Reading database ... 5%	(Reading database ... 10%	(Reading database ... 15%	(Reading database ... 20%	(Reading database ... 25%	(Reading database ... 30%	(Reading database ... 35%	(Reading database ... 40%	(Reading database ... 45%	(Reading database ... 50%	(Reading database ... 55%	(Reading database ... 60%	(Reading database ... 65%	(Reading database ... 70%	(Reading database ... 75%	(Reading database ... 80%	(Reading database ... 85%	(Reading database ... 90%	(Reading database ... 95%	(Reading database ... 100%	(Reading database ... 293173 files and directories currently installed.)	
Preparing to unpack .../libuv1-dev_1.43.0-1ubuntu0.1_amd64.deb ...	
Unpacking libuv1-dev:amd64 (1.43.0-1ubuntu0.1) ...	
Selecting previously unselected package libc-ares2:amd64.	
Preparing to unpack .../libc-ares2_1.18.1-1ubuntu0.22.04.3_amd64.deb ...	
Unpacking libc-ares2:amd64 (1.18.1-1ubuntu0.22.04.3) ...	
Selecting previously unselected package libnode72:amd64.	
Preparing to unpack .../libnode72_12.22.9~dfsg-1ubuntu3.6_amd64.deb ...	
Unpacking libnode72:amd64 (12.22.9~dfsg-1ubuntu3.6) ...	
Selecting previously unselected package libnode-dev.	
Preparing to unpack .../libnode-dev_12.22.9~dfsg-1ubuntu3.6_amd64.deb ...	
Unpacking libnode-dev (12.22.9~dfsg-1ubuntu3.6) ...	
Setting up libuv1-dev:amd64 (1.43.0-1ubuntu0.1) ...	
Setting up libc-ares2:amd64 (1.18.1-1ubuntu0.22.04.3) ...	
Setting up libnode72:amd64 (12.22.9~dfsg-1ubuntu3.6) ...	
Setting up libnode-dev (12.22.9~dfsg-1ubuntu3.6) ...	
Processing triggers for libc-bin (2.35-0ubuntu3.7) ...	
Quarto not found.
[2025-07-11T15:01:17.804659454+0000] Installing R package: DBI (1.2.3)
* installing to library ‘/usr/lib/R’
* installing *binary* package ‘DBI’ ...
* DONE (DBI)
[2025-07-11T15:01:18.601156317+0000] Installing R package: MASS (7.3-60.2)
* installing to library ‘/usr/lib/R’
* installing *binary* package ‘MASS’ ...
* DONE (MASS)
[2025-07-11T15:01:19.363351971+0000] Installing R package: R6 (2.6.1)
* installing to library ‘/usr/lib/R’
* installing *binary* package ‘R6’ ...
* DONE (R6)
[2025-07-11T15:01:20.049020712+0000] Installing R package: RColorBrewer (1.1-3)
* installing to library ‘/usr/lib/R’
* installing *binary* package ‘RColorBrewer’ ...
* DONE (RColorBrewer)
[2025-07-11T15:01:20.733418353+0000] Installing R package: Rcpp (1.0.14)
* installing to library ‘/usr/lib/R’
* installing *binary* package ‘Rcpp’ ...
* DONE (Rcpp)
[2025-07-11T15:01:22.172078643+0000] Building R package: b64 (0.1.6)
/mnt/packages/build /mnt
gcc -I"/opt/R/4.4.1/lib/R/include" -DNDEBUG   -I/usr/local/include    -fpic  -g -O2  -c entrypoint.c -o entrypoint.o
if [ -f ./rust/vendor.tar.xz ]; then \
	tar xf rust/vendor.tar.xz && \
	mkdir -p /tmp/Rtmp9ihIu9/R.INSTALLb1305cbc83/b64/src/.cargo && \
	cp rust/vendor-config.toml /tmp/Rtmp9ihIu9/R.INSTALLb1305cbc83/b64/src/.cargo/config.toml; \
fi
export CARGO_HOME=/tmp/Rtmp9ihIu9/R.INSTALLb1305cbc83/b64/src/.cargo && \
export PATH="/opt/R/4.4.1/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/.cargo/bin" && \
RUSTFLAGS=" --print=native-static-libs" cargo build -j 2 --offline --lib --release --manifest-path=./rust/Cargo.toml --target-dir ./rust/target 
* installing to library ‘/usr/lib/R’
* installing *source* package ‘b64’ ...
** package ‘b64’ successfully unpacked and MD5 sums checked
** using staged installation
Using cargo 1.75.0
Using rustc 1.75.0 (82e1608df 2023-12-21) (built from a source tarball)
Building for CRAN.
Writing `src/Makevars`.
`tools/config.R` has finished.
** libs
using C compiler: ‘gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0’
   Compiling proc-macro2 v1.0.94
   Compiling unicode-ident v1.0.18
   Compiling build-print v0.1.1
   Compiling extendr-ffi v0.8.0 (https://github.com/extendr/extendr#1a8fe422)
   Compiling paste v1.0.15
   Compiling extendr-api v0.8.0 (https://github.com/extendr/extendr#1a8fe422)
   Compiling quote v1.0.40
   Compiling syn v2.0.100
   Compiling either v1.15.0
   Compiling once_cell v1.21.3
   Compiling itertools v0.12.1
   Compiling base64 v0.21.7
   Compiling extendr-macros v0.8.0 (https://github.com/extendr/extendr#1a8fe422)
   Compiling b64 v0.1.0 (/tmp/Rtmp9ihIu9/R.INSTALLb1305cbc83/b64/src/rust)
error[E0658]: use of unstable library feature 'result_option_inspect'
   --> src/lib.rs:219:26
    |
219 |                         .inspect_err(|_| throw_r_error("Failed to decode split"))
    |                          ^^^^^^^^^^^
    |
    = note: see issue #91345 <https://github.com/rust-lang/rust/issues/91345> for more information

error[E0658]: use of unstable library feature 'result_option_inspect'
   --> src/lib.rs:223:26
    |
223 |                         .inspect_err(|_| throw_r_error("Failed to parse decoded bytes as a string"))
    |                          ^^^^^^^^^^^
    |
    = note: see issue #91345 <https://github.com/rust-lang/rust/issues/91345> for more information

error[E0658]: use of unstable library feature 'result_option_inspect'
   --> src/lib.rs:232:18
    |
232 |                 .inspect_err(|_| throw_r_error("Failed to decode input string"))
    |                  ^^^^^^^^^^^
    |
    = note: see issue #91345 <https://github.com/rust-lang/rust/issues/91345> for more information

error[E0658]: use of unstable library feature 'result_option_inspect'
   --> src/lib.rs:235:18
    |
235 |                 .inspect_err(|_| throw_r_error("Failed to parse decoded bytes to a string"))
    |                  ^^^^^^^^^^^
    |
    = note: see issue #91345 <https://github.com/rust-lang/rust/issues/91345> for more information

For more information about this error, try `rustc --explain E0658`.
error: could not compile `b64` (lib) due to 4 previous errors
make: *** [Makevars:26: rust/target/release/libb64.a] Error 101
ERROR: compilation failed for package ‘b64’
* removing ‘/usr/lib/R/b64’## End Task Log ################################################################
Error: Unhandled Exception: child_task=1567165392 child_task_status=failed: Error building image: Error building b64 (0.1.6). Build exited with non-zero status: 1
Execution halted

mbaynton · July 11, 2025, 4:20pm

Hi @vkatti ,
I've been investigating this a bit. Could you share your manifest.json file or the portion of it referencing the b64 package?

I noticed that the code in your error message,

error[E0658]: use of unstable library feature 'result_option_inspect'
   --> src/lib.rs:219:26
    |
219 |                         .inspect_err(|_| throw_r_error("Failed to decode split"))
    |                          ^^^^^^^^^^^
    |

is referencing code in b64 that only exists in b64 version 0.1.6, the very latest release. But the log says Compiling b64 v0.1.0 so I am curious which version is in fact being requested by your manifest.json

vkatti · July 13, 2025, 7:04am

OK, so i checked to see if there is a manifest.json file in my app folder and there wasn't. This is weird because when I checked the documentation, it said that this file gets created automatically when publish to shinyapp[dot]io from RStudio Desktop.

So I created one manually using rsconnect::writeManifest(). Viewing this file showed me that b64 was added as a dependency for the downloadthis package.

I quickly checked if I am really using this package or was it loaded as an experiment. Turns out I didn't really need this package. So I took outdownloadthis and recreated the manifest.json and voila!

I was able to successfully deploy to Shinyapps[dot]io

Thank you for pointing me in the right direction. Issue resolved.

system · October 11, 2025, 7:04am

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