Fix stack overflow in tst-setcontext9 (bug 23717)
The function f1a, executed on a stack of size 32k, allocates an object of size 32k on the stack. Make the stack variables static to reduce excessive stack usage.
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The function f1a, executed on a stack of size 32k, allocates an object of size 32k on the stack. Make the stack variables static to reduce excessive stack usage.