feat: --debug-app enables jsii stack traces#1623
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Recent Python and Java jsii clients can capture stack traces and send them to the JavaScript side, to end up in CDK stack captures. Because this has performance implications, this is not done by default but requires the environment variable `JSII_HOST_STACK_TRACES=1` to be set. `cdk --debug[-app]` will now set this environment variable if it isn't already set, so that in debug mode the stack traces are captured appropriately. We leave the environment variable alone if it's already set, so that the user can explicitly opt out of this behavior by setting it to `0` beforehand.
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Dependency Review✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.Scanned FilesNone |
otaviomacedo
approved these changes
Jun 12, 2026
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #1623 +/- ##
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Coverage 88.73% 88.73%
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Files 77 77
Lines 11359 11359
Branches 1585 1585
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Hits 10079 10079
Misses 1250 1250
Partials 30 30
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Recent Python and Java jsii clients can capture stack traces and send them to the JavaScript side, to end up in CDK stack captures.
Because this has performance implications, this is not done by default but requires the environment variable
JSII_HOST_STACK_TRACES=1to be set.cdk --debug[-app]will now set this environment variable if it isn't already set, so that in debug mode the stack traces are captured appropriately. We leave the environment variable alone if it's already set, so that the user can explicitly opt out of this behavior by setting it to0beforehand.By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license