Fix local deploy compilation for large module templates#19754
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When `targetScope = 'local'`, module `properties.template` was emitted via `EmitProperty(string, string)`, which serialized it as an ARM expression string literal and hit the 131072-character literal limit for large modules. This change emits the nested module template as a plain JSON string value in `TemplateWriter.EmitModuleForLocalDeploy`, avoiding expression literal serialization and preventing the internal `ExpressionException`. Also adds regression test `Test_Issue19750` in `ScenarioTests` to verify large local module templates compile successfully and are emitted as valid JSON string content.
Co-authored-by: Anthony Martin <38542602+anthony-c-martin@users.noreply.github.com>
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Jun 30, 2026
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Thanks for fixing this!
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Test this change out locally with the following install scripts (Action run 28413748873) VSCode
Azure CLI
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Fixes #19750
Description
Removes the 132k characters limit for compiled modules in local deploys by using the JSON writer instead of the text writer.
Tested against a production bicep file blocked by this issue and no side effects have been noticed.
Checklist