R version 4.0.1 Patched (2020-06-08 r78667) -- "See Things Now"
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Platform: x86_64-pc-linux-gnu (64-bit)

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> #### STRICT test suite in the spirit of no-segfaults,
> #### but with explicit statements.
> 
> options(error=expression(NULL))
> stop("test of `options(error=expression(NULL))'")
Error: test of `options(error=expression(NULL))'
> 
> if(FALSE) {
+ ## these ought to work on machines with enough memory
+ ## These segfaulted in 1.3.x ,  give "could not allocate" errors now
+   integer(2^30+1)
+    double(2^30+1)
+   complex(2^30+1)
+ character(2^30+1)
+ vector("list", 2^30+2)
+ }
> 
> ## bad infinite recursion / on.exit / ... interactions
> ##   catch the error to permit different error messages emitted
> ##   (handling of infinite recursion is different in the AST interpreter
> ##   and the byte-code interpreter)
> 
> bar <- function() 1+1
> foo <- function() { on.exit(bar()); foo() }
> tryCatch(foo(), error=function(x) TRUE) # now simple "infinite recursion"
[1] TRUE
>