Auto: Return cor & converge errors earlier than at the end

[SimonDedman]

glm.fit: algorithm did not converge (bin only?) if (!conv) warning("glm.fit: algorithm did not converge", call. = FALSE)

glm.fit: fitted probabilities numerically 0 or 1 occurred (bin only) if (any(mu > 1 - eps) || any(mu < eps)) warning("glm.fit: fitted probabilities numerically 0 or 1 occurred", call. = FALSE)

In cor(y_i, u_i) : the standard deviation is zero (gaus only?) from cor, base function

http://blog.obeautifulcode.com/R/A-Warning-About-Warning/ question asked here

Can just use warnings() or print(warnings()) ? After gbm.steps so L393 & 440. Tried