[metapost] mpost assertion failure

[Werner LEMBERG]

> And with rev. 30652, everything works fine again, thanks.

Alas, I spoke too soon.  While it doesn't crash any more, some of of
the resulting glyphs are heavily distorted.

Attached are the necessary input files to provide one of those glyphs,
together with mpost's PS output from r26509 (good) and r30634 (bad).
Sorry for not having more time to reduce the sample code even more.

Folks, this isn't production code...


    Werner


PS: Comparing the i386-linux mpost binaries of r26509 (for TeXLive
    2012) and the current one (r30634) I notice that the former has a
    size of about 506kByte, while the latter is almost 13 times
    larger, having 6474kByte!  How comes?  While I agree that disk
    space is cheap today, such an increase looks, well, heavy.


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%!PS
%%BoundingBox: -28 0 301 786 
%%HiResBoundingBox: -27.503 0 300.8456 785.82744 
%%Creator: MetaPost 1.504
%%CreationDate: 2013.05.23:1045
%%Pages: 1
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% MF2PT1: bbox 0 -160.88312 365.11708 160.88312
% MF2PT1: glyph_dimensions 0 -160.88312 365.11708 160.88312
% MF2PT1: font_size 0
% MF2PT1: font_slant 0
% MF2PT1: font_identifier UNSPECIFIED
% MF2PT1: font_coding_scheme UNSPECIFIED
% MF2PT1: font_fixed_pitch 0
% MF2PT1: charwd 3.66487
% MF2PT1: glyph_name flags.d3
% MF2PT1: bbox 0 -802.38164 300.8456 27.503
% MF2PT1: glyph_dimensions 0 -802.38164 300.8456 27.503
% MF2PT1: font_size 11.22
% MF2PT1: font_slant 0
% MF2PT1: font_identifier feta11.22
% MF2PT1: font_coding_scheme asis
% MF2PT1: font_fixed_pitch 0
% MF2PT1: charwd 3.01974
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% MF2PT1: font_size 11.22
% MF2PT1: font_slant 0
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% MF2PT1: font_coding_scheme asis
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-------------- next part --------------
%!PS
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%%CreationDate: 2013.05.23:1014
%%Pages: 1
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% MF2PT1: font_fixed_pitch 0
% MF2PT1: charwd 3.66487
% MF2PT1: glyph_name flags.d3
% MF2PT1: bbox 0 -802.38164 300.8456 27.503
% MF2PT1: glyph_dimensions 0 -802.38164 300.8456 27.503
% MF2PT1: font_size 11.22
% MF2PT1: font_slant 0
% MF2PT1: font_identifier feta11.22
% MF2PT1: font_coding_scheme asis
% MF2PT1: font_fixed_pitch 0
% MF2PT1: charwd 3.01974
% MF2PT1: bbox 0 -27.503 300.8456 802.38164
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% MF2PT1: font_size 11.22
% MF2PT1: font_slant 0
% MF2PT1: font_identifier feta11.22
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