[Issue 3520] New: std.numeric.CustomFloat horribly broken
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Mon Nov 16 19:54:21 PST 2009
http://d.puremagic.com/issues/show_bug.cgi?id=3520
Summary: std.numeric.CustomFloat horribly broken
Product: D
Version: 2.036
Platform: Other
OS/Version: Windows
Status: NEW
Severity: normal
Priority: P2
Component: Phobos
AssignedTo: nobody at puremagic.com
ReportedBy: dsimcha at yahoo.com
--- Comment #0 from David Simcha <dsimcha at yahoo.com> 2009-11-16 19:54:20 PST ---
Filing these as one bug report since they probably have the same underlying
cause (can't tell for sure since CustomFloat relies on BitFields, and debugging
string mixins that I didn't write myself is incredibly hard)
import std.stdio, std.numeric;
alias CustomFloat!(1, 13, 2) F;
void main() {
F num = F(0.314);
writeln(num.get!float);
}
Compile w/ -O -inline -release. Result: Compile time error:
numeric.d(206): Error: variable result used before set
Compile with default compiler settings. Result: Compiles, assert failure:
core.exception.AssertError at std.numeric(115): Assertion failure
Compile with -release to disable asserts but without -O to prevent compiler
from noticing variable used before set. Runs, produces incorrect result.
Prints:
1.74431e-39
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