compile error with #define, which previously compiled

i have line

code: [select]

#define datapin 4

about ide gives me error: "expected ',' or '...' before numeric constant".

the exact same line in previous sketch 1 derived from, , there compiled without problems. using different name solves it, seems ide bug, right?

we need see of code preprocessor directives screwed depending on place in source file.

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