carbon-lang

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Dave Abrahams 2afbfd6146 [executable semantics] silence known, and detect new, crashes (#312 )

* Add assertion to detect UB in interpreter.cpp

This change, applied to 6e5070d ("Adapting jsiek's executable semantics tooling
for commit. (#237)"), causes the if2.6c test to segfault.  Becase the assertion
fires only when `stmt == nullptr` and no code has permission to change `stmt`
(it is `const`) before it is dereferenced in the `switch`, and nothiing in
`PrintStatement` is supposed to exit the program, the assertion is a valid
change that detects a bug.

The crash was originally manifest in 29a5994 ("Executable Semantics: 1st-class
stacks (#296)").

* Temporarily disable the if2 test pending #311

See https://github.com/carbon-language/carbon-lang/issues/311

* [executable semantics] Record exit code on expected error.

This will prevent a final segfault from sneaking by, detected as a passing test.
A more principled follow-up commit would bottleneck detected error exit
reporting and have it write something to std::cerr that can be recognized.

2021-02-27 18:52:22 -08:00

action.cpp

Executable Semantics: 1st-class stacks (#296 )

2021-02-26 09:46:32 -08:00

action.h

Executable Semantics: 1st-class stacks (#296 )

2021-02-26 09:46:32 -08:00

assoc_list.h

Adapting jsiek's executable semantics tooling for commit. (#237 )

2021-02-19 15:25:43 -08:00

BUILD

Executable Semantics: 1st-class stacks (#296 )