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# error kind ExecutionFailed
# pre-build errors command failed: exit status: 101
# rustc version rustc 1.101.0-nightly (5d8fec066 2026-10-16)
# docs.rs version docsrs 0.0.0 (4259a798bb58835b634f4d75c4481f2f17bdb1d5 2026-10-17 )
# build log [INFO] adding target x86_64-unknown-linux-gnu for toolchain nightly [INFO] running `"rustup" "target" "add" "--toolchain" "nightly" "x86_64-unknown-linux-gnu"` [INFO] [stderr] info: component rust-std is up to date [INFO] running `"docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-w" "/opt/rustwide/workdir" "--user" "1001:1001" "f14a9e25f7a74a872ff6e95576292a0b99acb3c7feb8988bf4b34d2c18d56202" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=html-non-static-files\", \"--resource-suffix\", \"-20261016-1.101.0-nightly-5d8fec066\", \"--static-root-path\", \"/-/rustdoc.static/\", \"--extern-html-root-takes-precedence\"]" "--offline" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-j12" "--target" "x86_64-unknown-linux-gnu" "-Zrustdoc-scrape-examples"` [INFO] [stderr] warning: target filter specified, but no targets matched; this is a no-op [INFO] [stderr] Compiling bmux_mermaid_render v0.0.1-alpha.4 [INFO] [stderr] error: failed to run custom build command for `bmux_mermaid_render v0.0.1-alpha.4` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/bmux_mermaid_render/92f5f6a987ed921c/out/build_script_build` (exit status: 101) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/Cargo.lock.in [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/Cargo.toml.in [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/README.md [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/fonts [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/fonts/JETBRAINS_MONO_OFL.txt [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/fonts/JetBrainsMonoNerdFont-Regular.ttf [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/src [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/src/lib.rs [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/tests [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/guest/tests/abi.cjs [INFO] [stderr] cargo:rerun-if-changed=/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/wasm_config.rs [INFO] [stderr] cargo:rustc-env=BMUX_MERMAID_WASM_TARGET=x86_64-unknown-linux-gnu [INFO] [stderr] cargo:rerun-if-env-changed=CARGO [INFO] [stderr] cargo:rerun-if-env-changed=RUSTC [INFO] [stderr] cargo:rerun-if-env-changed=CARGO_HOME [INFO] [stderr] cargo:rerun-if-env-changed=CARGO_NET_OFFLINE [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] [INFO] [stderr] thread 'main' (4833) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bmux_mermaid_render-0.0.1-alpha.4/build.rs:24:9: [INFO] [stderr] could not build embedded Mermaid guest: guest Cargo failed (exit status: 101). Ensure the selected Rust compiler has the wasm32-unknown-unknown standard library installed. [INFO] [stderr] [INFO] [stderr] Updating git repository `https://github.com/BSteffaniak/mermaid-rs-renderer` [INFO] [stderr] error: failed to get `mermaid-rs-renderer` as a dependency of package `bmux-mermaid-guest v0.1.0 (/opt/rustwide/target/x86_64-unknown-linux-gnu/debug/build/bmux_mermaid_render/182f124ad1a7ec5e/out/guest)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] failed to load source for dependency `mermaid-rs-renderer` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] unable to update https://github.com/BSteffaniak/mermaid-rs-renderer?branch=wasm-portability#7c06c9ab [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] failed to create directory `/opt/rustwide/cargo-home/git/db/mermaid-rs-renderer-354b99861d3bc8af` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] Read-only file system (os error 30) [INFO] [stderr] [INFO] [stderr] note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace [INFO] running `"docker" "inspect" "f14a9e25f7a74a872ff6e95576292a0b99acb3c7feb8988bf4b34d2c18d56202"`