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std.debug: fix stack trace iteration code

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Previously, the stack trace iteration code was using the number of
frames collected as the number of frames to print, not recognizing the
fixed size of the buffer. So it would redundantly print items, matching
the total number of frames ever collected.

Now the iteration code is limited to the actual stack trace frame count,
and will not print duplicate frames.

Closes #2447
Closes #2151
This commit is contained in:
Andrew Kelley 2019-05-08 19:11:01 -04:00
parent a4aee8b24d
commit 9c12237d2d
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1 changed files with 1 additions and 1 deletions
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std/debug.zig
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@ -214,7 +214,7 @@ pub fn writeStackTrace(
tty_color: bool,
) !void {
var frame_index: usize = 0;
var frames_left: usize = stack_trace.index;
var frames_left: usize = std.math.min(stack_trace.index, stack_trace.instruction_addresses.len);
while (frames_left != 0) : ({
frames_left -= 1;