Paul Smith 04f4c2b8d9
[SV 64124] Avoid stack overflows for large command lines ...
Modify areas dealing with large command lines to use the heap rather
than relying on alloca / stack space.
* src/main.c (main): Allocate potentially large buffers with xmalloc.
(decode_env_switches): Ditto.
* src/function.c (func_error): Replace alloca with xmalloc/free.
* tests/scripts/features/expand: Add a newline for readable diffs.
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