Sara Golemon 868930e079 Fix potential crash when setting invalid declare value ...

Using a non-literal expression in a declare value can cause the
compiler to crash trying to turn that AST node into a usable zval.

There was an existing test for such values using 'encoding',
but that didn't crash because it's handled by the lexer
rather than being compiled.

Trying to use a non-literal with ticks reproduces the crash.

2017-02-28 17:08:23 -08:00

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