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Allow usage of Rust 1.91.1 and later patch releases #1576

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Merged
kpfleming merged 2 commits into from
Nov 12, 2025
Merged

Allow usage of Rust 1.91.1 and later patch releases #1576

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aab79e2
Allow usage of Rust 1.91.1 and later patch releases
kpfleming Nov 10, 2025
3e35b08
Add PR number to CHANGELOG entry.
kpfleming Nov 12, 2025
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2 changes: 1 addition & 1 deletion .fastly/config.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ toolchain_constraint = ">= 1.21" # Go toolchain constraint for use wit
toolchain_constraint_tinygo = ">= 1.18" # Go toolchain constraint for use with TinyGo.

[language.rust]
toolchain_constraint = ">= 1.78.0, < 1.91.0" # Rust 1.91.0 produces broken WASM packages which crash when handling requests
toolchain_constraint = ">= 1.78 != 1.91.0 < 1.92" # Rust 1.91.0 produces broken WASM packages which crash when handling requests
wasm_wasi_target = "wasm32-wasip1"

[wasm-tools]
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -6,6 +6,7 @@

### Enhancements:
- feat(service-version): Add JSON support to service-version clone command ([#1550](https://github.com/fastly/cli/pull/1550))
- feat(compute/build): Allow usage of Rust 1.91.1 and later patch releases ([#1576](https://github.com/fastly/cli/pull/1576)

### Bug fixes:

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6 changes: 6 additions & 0 deletions pkg/commands/compute/language_rust.go
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Expand Up @@ -361,6 +361,12 @@ func (r *Rust) toolchainConstraint() (*semver.Version, error) {
if strings.Contains(e.Error(), "is greater than") {
err = fmt.Errorf("version '%s' of Rust has not been validated for use with Fastly Compute", v)
}
// if an 'exact version' constraint was
// violated, generate an error message
// specific to that situation
if strings.Contains(e.Error(), "is equal to") {
err = fmt.Errorf("version '%s' of Rust is not compatible with Fastly Compute", v)
}
}
if err == nil {
err = fmt.Errorf("the Rust version requirement was not satisfied: '%w'", errors.Join(errs...))
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