Error on excessively large control flow graphs #18246
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RyanCavanaugh
approved these changes
Sep 5, 2017
mhegazy
reviewed
Sep 6, 2017
src/compiler/checker.ts
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| // excessive amount of time and possibly overflowing the call stack, we report an error and disable | ||
| // further control flow analysis in the containing function or module body. | ||
| flowAnalysisDisabled = true; | ||
| error(reference, Diagnostics.The_body_of_the_containing_function_or_module_is_too_large_for_control_flow_analysis); |
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we talked about putting this on the containing function if one exists. this way ppl have a consistent place to see the error, instead of it jumping around as they add/remove lines.
mhegazy
approved these changes
Sep 6, 2017
mhegazy
approved these changes
Sep 11, 2017
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This PR improves our handling of excessively large control flow graphs: If control flow analysis leads to a stack depth of 2500 recursive calls, we now issue an error and disable control flow analysis for the remainder of the containing function or module body. Previously we'd simply overflow the call stack.
The 2500 recursive call limit was experimentally determined. Control flow patterns that cause recursion in the control flow analyzer (such as #11432) overflow the stack somewhere between 2500 and 5000 calls.
No RWC tests are affected by this change.
Fixes #14314 in the sense that it doesn't overflow the stack. However, #14314 still takes >80s to compile.