Global variable globalDebuggingNames in the front-end can accumulate a
lot of garbage (all ASTs) if toString() is called from an AST node.
Bytecode generator uses Expression.getStaticType a lot, which calls
Expression.getStaticTypeAsInstanceOf, which sometimes calls toString()
when it throws an error (these crashes are tracked in
https://github.com/dart-lang/sdk/issues/34496 and bytecode generator
has a workaround to catch them).
As a result, after bytecode generation all ASTs were hanging out of
globalDebuggingNames, which leaks a lot of memory.
Fixes https://github.com/dart-lang/sdk/issues/38553
Change-Id: Ic1516d5ec9bf60861ae678e150c66d2e9394e2cd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/118914
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Alexander Markov
dd65f97118