This is %-interp-buffer-overflow-when-compiling-rn-PL-40-under-1.0-a-gcc-bug in view mode; [Up]
Date: Sun 15-Dec-1989 14:45:52 From: eps@toaster.SFSU.EDU (Eric P. Scott) Subject: % interp buffer overflow when compiling rn PL 40 under 1.0 a gcc bug When this machine was upgraded from 0.9 to 1.0 we recompiled all the local software. rn patchlevel 40 started generating "% interp buffer overflow!" aborts when attempting to follow up to articles. The problem has been traced to the gcc optimizer: *** intrp.c Fri Nov 21 14:26:45 1986 834 i = metabit; /* maybe get into register */ 835 if (s == dest) { 836 while (*dest) { 837 if (--destsize <= 0) 838 abort_interp(); 839 *dest++ |= i; ^^ this increment lost in optimization 840 } 841 } 842 else { 843 while (*s) { 844 if (--destsize <= 0) 845 abort_interp(); 846 *dest++ = *s++ | i; 847 } 848 } Compiling intrp.c without -O "works" ok. -=EPS=-
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