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When compiling a try/catch statement with an exception variable, the catch
skip jump incorrectly pointed to the POP instruction popping the exception
variable off the stack, leading to a stack position mismatch between
compiler and vm, causing local variables to yield wrong values at runtime.
-- Expect stdout --
1
-- End --
-- Testcase --
{%
function f() {
let x;
try {
x = 1;
}
catch(e) {
}
// Before the fix, `x` incorrectly yielded the print function value
print(x, "\n");
}
f()
%}
-- End --
When compiling a try/catch statement with local variable declearations
within the try block, the catch skip jump incorrectly happened before the
local try block variables were popped off the stack, leading to a stack
position mismatch between compiler and vm, causing local variables to
yield wrong values at runtime.
-- Expect stdout --
1
-- End --
-- Testcase --
{%
try {
let a;
}
catch {}
let b = 1;
print(b, "\n");
%}
-- End --
|
